A blog on Weblogic Server by upillai

Tuning JRockit

2011-05-24T06:30:00.000+05:30

Tuning the Heap Size:

A large heap decreases the garbage collection frequency but may take slightly longer to garbage collect.
Typically a heap should be at least twice the size of the live objects in the heap.
Should set the heap as large as the PHYSICAL memory in your system will allow, as long as it doesn’t cause paging.
-Xms:, which sets the initial and minimum heap size.
-Xmx:, which sets the maximum heap size.
Set the initial/minimum heap size (-Xms) to the same value as the maximum heap size (-Xmx).

Tuning the Garbage Collection

JRockit offers three garbage collection modes and a number of static garbage collection strategies. You can tune the garbage collection to suit your application’s needs.
-XgcPrio:throughput: Defines that the garbage collection should be optimized for application throughput. This is the default garbage collection mode.
-XgcPrio:pausetime : Defines that the garbage collection should be optimized for short garbage collection pauses.
-XgcPrio:deterministic {Only with JRockit Real-Time}: Defines that GC should be optimized for very short and deterministic garbage collection pauses.

Tuning the Pause Target

This parameter is used to tune JVMs which host ‘time critical applications’ (Ex: A banking application that normally take 100 ms to complete and times out after 400 ms, cannot afford a GC pause time of 500ms)
The pause time mode uses a pause target for optimizing the pause times; pause target should be as high as your application can tolerate
This parameter is coupled and used with ‘-XgcPrio:pausetime’ (ex: java -XgcPrio:pausetime -XpauseTarget:300ms weblogic.Server); default ‘pauseTarget’ is not specified is 500ms

# Below given parameters should not be changes until you

feel a real need to tune your Weblogic server; incorrect

 tuning may lead to uneven performance degradation.

Tuning Compaction

Whenever GC(old collection) runs it defragments the heap, making object allocation easier for the JVM this process is called heap compaction; compaction may lead to long pauses in GC because it takes up the CPU time to arrange and defragment the heap
-XXcompactRatio:centage> : this specifies the percentage of heap which will be defragmented when GC runs; a good value for the compact ratio is usually between 1 and 20; a too low value can also invite trouble as it slows down defragmentation and increases the amount of dark matter(“Dark matter” is wasted heap memory and fragments the heap)
-XXcompactSetLimit:<references> : When compaction has moved objects, the references to these objects must be updated. JVM has to do this before threads have access to those memory references; this parameter defines how many references GC can compact within the compaction area (Ex: java -XXcompactSetLimit:20000 MyApplication)

Tuning the TLA (Thread Local Area)

It is the chunk of memory reserved in the heap for a thread for its exclusive use.
When this TLA gets filled up we see the ‘java.lang.OutOfMemoryError: nativeGetNewTLA’, to fix this we can tune the ‘-XXtlaSize:min=e>,preferred=’ parameter increase the TLA (Ex: -XXtlasize:min=8k,preferred=512k)
Increasing the TLA size is beneficial for multi threaded applications; however increasing it too much may result in more fragmentation and more frequent garbage collections.

Weblogic Server Administration Server Interview Questions 1 of 6

2010-08-04T01:48:00.000+05:30

What are clusters?

Ø Cluster is a logical set of multiple Weblogic Server instances running simultaneously across different geographies and working together to achieve high availability and scalability

Ø Weblogic Server clusters support multiple algorithms for load balancing and failover: round-robin, weight-based, random, round-robin-affinity, weight-based-affinity, and random-affinity(By default, a Weblogic Server cluster will use the round-robin method)

What is session replication?

Ø Weblogic Server provides clustering support for servlets and JSPs by replicating 'HTTP session state' of clients that access servlets and JSPs through a cluster service

Ø Weblogic Server can use 'memory, file based and database' persistence for storing session information

How you deploy your applications on weblogic server?

Ø Auto Deployment

Ø Console

Ø Command line – weblogic.deployer

Ø ANT / WLST

What are stating modes are available in Weblogic Server ?

Ø Stage mode: Administration Server copies the deployment files from their original location on the Administration Server machine to the staging directories of each target server

Ø External Stage: target servers deploy using local copies of the deployment files, here the Administration Server does not automatically copy the deployment files to targeted servers in external_stage mode ; instead, you must copy the files to the staging directory of each target server before deployment.

Ø No Stage: The Administration Server does not copy deployment unit files; instead, all servers deploy using the same physical copy of the deployment files, which must be directly accessible by the Administration Server and target servers.

What is a Thread dump? How will you take in unix/linux and windows?

Ø A Java thread dump is a way of finding out what every thread in the JVM is doing at a particular point in time. This is especially useful if your Java application sometimes seems to hang when running under load, as an analysis of the dump will show where the threads are stuck.

Ø Linux : kill -3 <ps_id>

Ø Windows (console mode) : crtl+break

Ø Windows (service) : beasvc -dump -svcname:mydomain_myserver

How should u look for in a Thread Dump?

Ø Always have 7-10 thread dumps taken in an interval of 5 seconds each

Ø A thread dump will give you an insight on what every thread in the JVM is currently doing

Ø While analyzing the thread dump you should be looking for stuck threads (threads which have not moved from a long time) – could be a resource (file / db) lock not allowing the thread to complete the task and free the monitor

Ø Look for thread locsk(if two threads store references to different objects into the same reference value, the variable will subsequently contain a reference to one object or the other, not a reference to some other object or a corrupted reference value)

Ø Look for recursive loops in application / server code traces, usually hampers server performance by utilizing CPU

What is difference between 8.1 and 9.2, 10.x versions?

Ø 8.1 uses JDK 1.4.2 ; 9.2/10.0 uses JDK 1.5 ; 10.3 uses JDK 1.6

Ø 8.1 uses execute worker threads ; 9.2/10/10.3 uses work manager for work load distribution within the server

Ø Directory structures

Ø Console applet bases in 8.1 ; while it is portlet based in later versions

Ø 8.1 has one big config.xml ; later versions have basic info in config.xml and subsystem level info in different directories(jms, jdbc, etc)

What are multi pools / multi data sources?

Ø MultiPools are 'pools of connection pools' that you can set up according to either a high availability or load balancing algorithm

Ø You can use a MultiPool in the same manner that you use a connection pool.

Ø When an application requests a connection, the MultiPool determines which connection pool will provide a connection, based on the selected algorithm

What is IIS server?

Ø IIS is a webserver developed by Microsoft which is shipped with Windows NT/2000/2003 +

Ø Available versions : 5, 6, 7

Ø Usually used for hosting static HTML pages and used as an aplkication server for ASP.NET application developed using DOT NET framework 1+.

Ø Can be used as a proxy server for routing requests to weblogic server

Where are user credentials stored?

Ø User credentials are stored in the 'boot.properties' file , which has its encryption key in the 'SerializedSystemIni.dat'

Ø If you use a script to start a server instance, it is recommended that you do not use this technique because it requires you to store an unencrypted password in the startup script.

Suggest few JVM tuning parameters.

Ø Initial heap size and maximum heap size to be same (-xms and –xmx):T his ensures less is spend by the CPU to allocate memory in rutime

Ø Young generation (-XX:MaxNewSize): The bigger the young generation, the less often minor collections occur. However, for a bounded heap size a larger young generation implies a smaller tenured generation, which will increase the frequency of major collections. The optimal choice depends on the lifetime distribution of the objects allocated by the application.

Do forget to leave your comments

Part 2 coming soon... keep posted for further updates....

--
Regards,
Unni

Add and Remove targets

2010-06-01T22:27:00.005+05:30

Add and Remove targets from a Deploy-able system resource:

@Deepti : i wrote this post for you babie...

• Any deploy-able weblogic system resource (JDBC Data Source, JMS Connection Factory, JMS Servers, JDBC Multi Pools, Web deployment, etc) implement the 'DeploymentMBean' interface.

• A deploy-able Systme resource is any MBean that may be deployed on one or more targets, such as a JMS Front-end or back-end or a JDBC connection pool.

• Any deploy-able resource (MBean) has targets, which specify which servers the deployment should be deployed / pinned on.

• All these deploy-able resources (MBean) leverage 'addTarget' and 'removeTarget' methods , which they inherit from the 'DeploymentMBean' interface.

o addTarget(target)

- This method adds a target to specify additional servers / clusters on which the deployable Mbean can be deployed

- here, target - is the reference variable of type: TargetMBean, [a server MBean is acceptable], see example below

o removeTarget(target)

- This method removes the value of the addTarget attribute

- here, target - is the reference variable of type: TargetMBean, [a server MBean is acceptable], see example below

o In this example we will use a JDBC Data Source to demonstrate this:

o Prerequisites

- WebLogic Domain with an admin server and a managed server named 'MS1'

- Create a JDBC Datasource named 'DS1', and deploy it ONLY on 'Admin Server'

- Make sure that both the servers are running and DS1 is also running

o Demonstration for adding a target to a Data Source:

- open a command window (CMD)

- set the environment by running the 'setdomainenv.cmd' from the 'domain\bin' dir

- execute 'java weblogic.WLST'

- connect to the Admin Server using 'connect' command

Code written using online editor Pastebin.com - Download Raw
##      Written by Unni -- don't hesitate to add a comment to this post incase you have any queries or sugessions
##      you can even write to me at unni@unnikrishnanpillai.tk
##      please leave a comment if u find this post helpfull
edit()
startEdit()
cd('/JDBCSystemResources/DS1')
jdbcDS1=cmo
cd("/Servers/MS1")
target=cmo  
jdbcDS1.addTarget(target)
save()
activate()

o You should be able to see the new target in the Admin Console (Service > JDBC > DataSources > DS1 > Targets Tab)

o Demonstration for removing a target to a Data Source:

- open a command window (CMD)

- set the environment by running the 'setdomainenv.cmd' from the 'domain\bin' dir

- execute 'java weblogic.WLST'

- connect to the Admin Server using 'connect' command

Code written using online editor Pastebin.com - Download Raw
##      Written by Unni -- don't hesitate to add a comment to this post incase you have any queries or sugessions
##      you can even write to me at unni@unnikrishnanpillai.tk
##      please leave a comment if u find this post helpfull
edit()
startEdit()
cd('/JDBCSystemResources/DS1')
jdbcDS1=cmo
cd("/Servers/MS1")
target=cmo  
jdbcDS1.removeTarget(target)
save()
activate()

• You should be able to see the new target in the Admin Console (Service > JDBC > DataSources > DS1 > Targets Tab)

Holla :)

Unni,

unni@unnikrishnanpillai.tk

Configuring JMS Bridges on Weblogic Server

2010-04-07T17:46:00.001+05:30

Configuring JMS Bridges on Weblogic Server

Some background on JSM Bridges:

· The bridge allows you to configure a forwarding mechanism between any two messaging products (WLS-WLS-any version, WLS to any 3rd party JMS vendor, any 3rd party vendor - anyother 3rd party vendor)

· A messaging bridge connects two actual destinations that are mapped to bridge destinations: a source destination from which messages are received, and a target destination to which messages are sent.

Advantages of using a Messaging Bridge:

A messaging bridge provides high availability for remote destinations. Store and forward messaging enables a local client to produce to a local destination and have those messages automatically forwarded to the remote destination when it is available
This allows a local client to continue to produce messages when a remote destination is not available
Allowing transparency
Replicating a Topic
A messaging bridge can be used to replicate a topic, similar to using the distributed topics feature

WLS Bridges support these three types of QOS(Quality of Service) levels:

Exactly-once—The highest QOS guarantees that a message is sent to the remote endpoint once and only once. With Exactly-once, messages survive server crashes and network down time, while guaranteeing one occurrence of each message at the endpoint.
At-least-once—Guarantees that a message is sent to the remote endpoint, but with the possibility of duplicates. With At-least-once, multiple copies of a message might show up on the remote endpoint because of network failures or server crashes that occur when the message is in transit.
At-most-once—The lowest QOS guarantees that each message is sent to the remote endpoint only once, if at all. It does not guarantee that a message is sent to the endpoint. With At-most-once, messages may get lost because of network failures or server crashes. No duplicate messages will reach the endpoint.

Architecture for this PoC:

Step by Step Instructions:

1. Create new domain named 'LocalDomain' with admin server listening on 7001

2. Follow the below steps to create WLS resources in the domain:

i. **Local and Edit**

ii. Create a JMS Server (LocalJMSServer)

iii. Create a new store(FileStore0)

iv. Associate JMS Server to FileStore0

v. Target to Admin Server

vi. Create a new JMS Module

vii. Deploy it to the Admin Server

viii. Create new Connection Factory (JNDI: JMS/LocalCF)

ix. Create a new source Queue (JNDI: JMS/LocalQ)

x. Click on New Sub Deployment -> name it LocalQSub -> target it to LocalJMSServer

xi. **Activate Changes**

xii. Restart for changes to come into effect

3. Create new domain named 'RemoteDomain' with admin server listening on 8001

4. Follow the below steps to create WLS resources in this domain:

xiii. **Local and Edit**

xiv. Create a JMS Server (RemoteJMSServer)

xv. Create a new store(FileStore0)

xvi. Associate JMS Server to FileStore0

xvii. Target to Admin Server

xviii. Create a new JMS Module

xix. Deploy it to the Admin Server

xx. Create new Connection Factory (JNDI: JMS/RemoteCF)

xxi. Create a new source Queue (JNDI: JMS/RemoteQ)

xxii. Click on New Sub Deployment -> name it RemoteQSub -> target it to RemoteJMSServer

xxiii. **Activate Changes**

xxiv. Restart for changes to come into effect

xxv. Click on Services > Messaging > Bridges > JMS Bridge Destinations

xxvi. **Local and Edit**

xxvii. Create a New JMS Bridge Destination >> Name: LocalQ >> Connection URL: t3://LocallIP:7001 >> Connection Factory JNDI Name: JMS/LocalCF >> Destination JNDI Name: JMS/LocalQ

xxviii. Create a New JMS Bridge Destination >> Name: RemoteQ >> Connection URL: t3://RemoteIP:8001 >> Connection Factory JNDI Name: JMS/RemoteCF >> Destination JNDI Name: JMS/RemoteQ

xxix. **Activate Changes**

xxx. **Local and Edit**

xxxi. Click on Services > Messaging > Bridges

xxxii. Create New JMS Bridge >> Name: JMSBridge >> Quality Of Service: Almost-once >> Check Started >> Existing Source Destination: LocalQ >> Existing Target Destination: RemoteQ >> Target it AdminServer

xxxiii. **Activate Changes**

5. Make your producer listen on t3:// LocalIP:7001 and Connection Factory: JMS.LocalCF and Destination Queue: LocalQ

6. Make your consumer listen on t3:// RemoteIP:8001 and Connection Factory: JMS.RemoteCF and Destination Queue: RemoteQ

Producer / Consumer Screenshots:

Using WLS 8.1 Threading Model in WLS 9.x / 10.x

2010-03-26T13:33:00.003+05:30

If in the past (versions prior to WLS 9.x) you have been using execute queues to improve performance of your applications , you may still continue avail the flexibility of 8.1 style execute queues by following the below given steps:

1. manually add the following in the config.xml:

<server>
<name>AdminServer</name>
<use81-style-execute-queues>true</use81-style-execute-queues>
<listen-address/>
</server>

<OR>

1. Add the following in JAVA_OPTIONS : -Dweblogic.Use81StyleExecuteQueues=true

2. Start the weblogic server

On adding this parameter you will see a tab names 'QUEUES' under 'Server > configuration' in the administration console
Create a new Queue named : weblogic.kernel.defaultNow you can edir the properties of the Queue in the similar manner you use to do it in WLS 8.1
This may come handy: http://download.oracle.com/docs/cd/E11035_01/wls100/perform/appb_queues.html#wp1048423

Cheers :)
Unni

Why sub-deployments are used?

2010-03-26T13:18:00.002+05:30

Ever wondered why sub-deployments are used for deploying JMS resources ?

A sub-deployment is a mechanism by which JMS module resources like 'queues, topics, and connection factories' can be grouped and targeted to a server resource like 'JMS servers, server instances, SAF agents, or a cluster'.
You can group a connection factory with stand-alone queues or topics in a sub-deployment targeted to a specific JMS server, which guarantees that all these resources are co-located to avoid extra network traffic.
Another advantage of such a configuration would be if the targeted JMS server needs to be migrated to another Weblogic server instance, then the connection factory and all its connections will also migrate along with the JMS server's destinations.

Delete Admin Server for a running Weblogic domain

2010-03-24T20:32:00.001+05:30

There would be scenarios in prod/dev environments which warrants us to create a new / stand by AdminServer, you may follow the below gives steps to achive the same.

You cannot use the Administration Console to delete the Administration Server as the admin console runs on the Administration Server

Try these steps:

Create a new server name: newAdminServer (say port number: 8001)
Stop all running servers in the domain on which you are working on
Start the new server as admin server: java -Dweblogic.Name= newAdminServer weblogic.Server
Start the Administration Console for the newly-started server http://ip:8001/console
Delete the default admin server form the console

Cheers :)
Unni

Use 'userConfigFile' for connecting to weblogic

2010-02-25T02:53:00.001+05:30

We can use the 'storeUserConfig' command to create a user configuration file that contains your credentials in an encrypted form and a key file that Weblogic Server uses to unencrypted credentials.

And on subsequent WLST sessions (or in WLST scripts), supply the name of the user configuration file and key file instead of entering the credentials on the command line. This option is recommended if you use WLST in script mode because it prevents you from storing unencrypted user credentials in your scripts.

## This script creates a user config file

wls:/offline> connect('weblogic','weblogic',url='10.10.71.94:7001')

wls:/Distributed_Domain/serverConfig> storeUserConfig('d:/DeeptiPY/Unni-WebLogicConfig.properties', 'd:/DeeptiPY/Unni-WebLogicKey.properties')

## This will create two files 'Unni-WebLogicConfig.properties' and 'Unni-WebLogicKey.properties'

## WebLogicConfig has the encrypted username and password, WebLogicKey has the logic to decrypt them

## End the current WLST session

wls:/Distributed_Domain/serverConfig> exit()

## Sample Script to monitor state of the server:

## This demonstrates how we can connect to a server without using clear text credentials

wls:/offline> connect(userConfigFile='d:/DeeptiPY/Unni-WebLogicConfig.properties',userKeyFile='d:/DeeptiPY/Unni-WebLogicKey.properties',url='t3://10.10.71.94:7001')

wls:/Distributed_Domain/serverConfig> state('MSLocal')

Current state of 'MSLocal' : RUNNING

Please post your queries / comments.

Cheers:)

Unni

Basic Unix commands

2010-02-06T23:39:00.001+05:30

DOS Command	Unix Command	Descriptions
CD	cd	Change directory
CHKDSK	du	Disk usage
CLS	clear	Clear the current screen
COPY	cp	Copying files
DEL	rm	Removing files or directories
DIR	ls	File listing of directories
MD	mkdir	Create a directory
MORE	more	Type out a file with paging
PRINT	lpr	Print out a file
RD	rmdir	Remove a directory
RENAME	mv	Moving files around
TYPE	cat	Type out files

Unix Command	Descriptions
rm file	Remove a file
rm file1 file2 …	Remove a number of files
rm -r directory	Remove a directory include the sub-directory
rmdir directory	Remove a directory

Unix Command	Descriptions
man cp	Display on-line manual for the "cp" command
man -k keyword	Display manual help file related to the keyword
passwd	Change your login password
pwd	Display the path name of where you are
uptime	Tell you how long the machine has been up and running
users	Tell you who is logging in
who	Tell you who is logging-in in detail
w	Tell you who is logging in and doing what!
whoami	Show you the owner of this account
finger user	Find out the personal information of a user
finger name	Try to find the person's info. by his/her name
finger email-address	Try to find the person's info across the network
write user	Write a message on somebody's screen
talk user	Talk to the person logging in the same system with you
talk email-address	Talk to somebody logging in the network
date	Display today's time and date
cal year	Display the calendar of the specified year (e.g. 1997)

WLST Script to enabe Log4j Logger on a weblogic server

2010-01-18T22:18:00.000+05:30

WebLogic logging services use an implementation based on the Java Logging APIs, by default. Using the LogMBean.isLog4jLoggingEnabled attribute, you can direct the logging services to use Log4j instead.

Posted by Unni# Start WLST

C:\>java weblogic.WLST
 
# connect Administration Server
wls:/offline> connect('uname','password')
 
# Start an edit session and navigating to the logging mbean for the server names myserver
wls:/mydomain/serverConfig> edit()
wls:/mydomain/edit> startEdit()
wls:/mydomain/edit !> cd("Servers/myserver/Log/myserver")
 
# enable log4j
wls:/mydomain/edit/Servers/myserver/Log/myserver !> cmo.setLog4jLoggingEnabled(true)
 
#save and activate the changes
wls:/mydomain/edit/Servers/myserver/Log/myserver !> save()
wls:/mydomain/edit/Servers/myserver/Log/myserver !> activate()

Java Logging is the default for client and server-side logging; Log4j is available only for server-side and not client-side logging.

A Collection of SUN JVM Options

2009-12-07T10:04:00.003+05:30

A Collection of JVM Options
compiled by: Joseph D. Mocker (Sun Microsystems, Inc.)

http://blogs.sun.com/watt/resource/jvm-options-list.html

This document is a compilation of all the JVM options for various versions of the JVM on primarily SPARC/Solaris Platform. The descriptions for each option are taken mostly verbatim from the reference documents

BEA-000388 - JVM called WLS shutdown hook. The server will force shutdown now

2009-12-07T09:56:00.002+05:30

Issue:

The WLS shuts down with the similar errors in log files:

Possible Cause and Solution:

I have the following suggestion for you for the below error:

1.) It seems like some component is sending the wrong signal to the JVM and this issue is occurring. JVM monitors and catches OS signals, like: CTRL +C event, Log off event, shutdown event.When JVM catches one of the stated above signals, it shutdowns all java processes.

Please try these possible solutions of this problem:

· Specify -Xrs parameter in the JAVA startup arguments and start the admin server

· -Xrs

· Note: -Xrs is a non-standard option developed by Sun Microsystems for their HotSpot JVM. BEA JRockit continues to support this option; however the BEA JRockit non-standard option -XnoHup provides the same functionality. -Xrs reduces usage of operating-system signals by the JVM. If the JVM is run as a service (for example, the servlet engine for a web server), it can receive CTRL_LOGOFF_EVENT but should not initiate shutdown since the operating system will not actually terminate the process. To avoid possible interference such as this, the -Xrs command-line option does not install a console control handler, implying that it does not watch for or process CTRL_C_EVENT, CTRL_CLOSE_EVENT, CTRL_LOGOFF_EVENT, or CTRL_SHUTDOWN_EVENT Operation.

2.) If the issue recurs again even after trying the above option then can you please apply thefollowing JAVA_OPTION:

· Depending on the JVM version, it may be possible to get a thread dump before the process exits

· HotSpot supports the command-line option -XX:+ShowMessageBoxOnError

· The corresponding JRockit option is -Djrockit.waitonerror

· While the JVM< goes down, it may prompt the user: "Do you want to debug the problem?"

· This pauses the JVM, thereby creating an opportunity to generate a thread dump (a stack trace of every thread in the JVM), attach a debugger, or perform some other debugging activity.

Infinite loop in hasmap.put caused high CPU usage stuck threads

2009-12-07T09:43:00.002+05:30

Issue:

Weblogic threads going into a hang/ locked / stuck state with the following stack trace in thread dumps:

at java/util/HashMap.put(HashMap.java:1657)[optimized]

at java/util/HashSet.add(HashSet.java:194)[inlined]

at weblogic/rmi/internal/dgc/DGCServerImpl.addPhantomRef(DGCServerImpl.java:136)[inlined]

at weblogic/rmi/internal/BasicServerRef.getLocalRef(BasicServerRef.java:729)[inlined]

at weblogic/rmi/internal/BasicServerRef.getStubReference(BasicServerRef.java:709)[optimized]

at weblogic/rmi/cluster/ClusterableServerRef.getStubReference(ClusterableServerRef.java:193)[optimized]

at weblogic/rmi/internal/OIDManager.getReplacement(OIDManager.java:172)[optimized]

at weblogic/rmi/utils/io/RemoteObjectReplacer.replaceRemote(RemoteObjectReplacer.java:123)[inlined]

at weblogic/rmi/utils/io/RemoteObjectReplacer.replaceObject(RemoteObjectReplacer.java:104)[optimized]

at weblogic/rmi/utils/io/InteropObjectReplacer.replaceObject(InteropObjectReplacer.java:62)

at weblogic/utils/io/ChunkedObjectOutputStream.replaceObject(ChunkedObjectOutputStream.java:42)

at weblogic/utils/io/ChunkedObjectOutputStream$NestedObjectOutputStream.replaceObject(ChunkedObjectOutputStream.java:151)

at java/io/ObjectOutputStream.writeObject0(ObjectOutputStream.java:1045)[inlined]

at java/io/ObjectOutputStream.writeObject(ObjectOutputStream.java:302)[optimized]

at weblogic/jms/client/JMSConnectionFactory.writeExternal(JMSConnectionFactory.java:359)

at java/io/ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1310)

at java/io/ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1288)[inlined]

at java/io/ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)[inlined]

at java/io/ObjectOutputStream.writeObject(ObjectOutputStream.java:302)[optimized]

at weblogic/rjvm/MsgAbbrevOutputStream.writeObject(MsgAbbrevOutputStream.java:614)

at weblogic/utils/io/ChunkedObjectOutputStream.writeObject(ChunkedObjectOutputStream.java:73)

at weblogic/jndi/internal/RootNamingNode_WLSkel.invoke(ILweblogic/rmi/spi/InboundRequest;Lweblogic/rmi/spi/OutboundResponse;Ljava/lang/Object;)Lweblogic/rmi/spi/OutboundResponse;(Unknown Source)

at weblogic/rmi/internal/BasicServerRef.invoke(BasicServerRef.java:553)[optimized]

at weblogic/rmi/cluster/ClusterableServerRef.invoke(ClusterableServerRef.java:224)

at weblogic/rmi/internal/BasicServerRef$1.run(BasicServerRef.java:443)[inlined]

at weblogic/security/acl/internal/AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)[inlined]

at weblogic/security/service/SecurityManager.runAs(SecurityManager.java:147)[inlined]

at weblogic/rmi/internal/BasicServerRef.handleRequest(BasicServerRef.java:439)[inlined]

at weblogic/rmi/internal/BasicServerRef.access$300(BasicServerRef.java:61)[inlined]

at weblogic/rmi/internal/BasicServerRef$BasicExecuteRequest.run(BasicServerRef.java:983)[optimized]

at weblogic/work/ExecuteRequestAdapter.execute(ExecuteRequestAdapter.java:21)[optimized]

at weblogic/kernel/ExecuteThread.execute(ExecuteThread.java:145)[optimized]

Explanation:

- This issue is a resultant of a Hashmap.put() going into a recursive loop causing the weblogic thread going into a stuck state and eventually causing the CPU utilization for the process to increase resulting in an unresponsive

Solution:

- Oracle forums say that this to be BUG in the weblogic server, and has released a patch for the same

- To get a fix for this issue: Open a support ticket with support along with the latest thread dumps so that they can diagnose the issue and provide relevant fixes

< Reached maximum capacity of pool "MyPoolDS", making "0" new resource instances instead of "10".>

2009-12-07T09:18:00.001+05:30

What to do when you see a similar message in weblogic server logs:

<BEA-000627> < Reached maximum capacity of pool "MyPoolDS", making "0" new resource instances instead of "10".>

Suggestions:

1. What is the right thing to after Reached maximum capacity of pool?

· You can get this message, in many scenarios

i. When the number of connections configured for the connection pool using MaxCapacity is not sufficient for the application use. In this case, it is suggested to increase the no: of connections.

ii. When there is no available thread to get the connection. As a thumb rule, it is always recommended to keep the execute thread size equal to the max number of connection.

2. You can tune the 'InactiveConnectionTimeoutSeconds' parameter:

· InactiveConnectionTimeoutSeconds refers to the number of inactive seconds on a reserved connection before Weblogic Server reclaims the connection and releases it back into the connection pool.

· You can use the Inactive Connection Timeout feature to reclaim leaked connections - connections that were not explicitly closed by the application. Note that this feature is not intended to be used in place of properly closing connections.

· When set to 0, the feature is disabled

· In addition to all the above information, it is always recommended to follow the following settings for your connection pool in your production environment to improve performance:

i. set <InitialCapacity> = <MaxCapacity>

ii. This will ensure that all connections are opened during Weblogic Server start. As creation of a physical database connection is very expensive, all needed connections should be opened immediately and kept open

iii. disable shrinking by setting <ShrinkingEnabled> to false

iv. As mentioned above, creation of physical database connections is expensive, connections should be established once and kept during the complete lifetime of the Weblogic Server instance

v. Set <TestConnectionsOnReserve> to true, this will ensure that connections are tested before they go to the application and are reopened if needed set <TestConnectionsOnRelease> to false.

vi. As connection testing is an overhead that should be avoided where possible, connection testing for connections that an application gives back to the pool is an unnecessary effort. As long as connections are tested during a getConnection, this is not needed.

vii. Using 'TestConnectionsOnReserve' and 'TestConnectionsOnRelease' may have an impact on performance.

Weblogic side by side deployment

2009-12-06T03:40:00.002+05:30

Weblogic Server supports a nice feature called side-by-side deployment (or versioned deployment). This function is extremely usefull when you need to deploy a new version of an application and still keep the old one up and running. So the running instances will still use the current version and all new instances will be able to invoke the new deployed version of the application.
As soon as all the sessions who're using the old version of the application are expired, Weblogic will recognize it and will deactivate the old version. So at this moment only the new deployed version is active and all new sessions will make us of it.

So how does this work.

You could either use wlst to deploy the application and specifiy the versionnumber on deployment as one of the parameters or you can use the manifest.mf file. We'll be using the last one.

Create a webservice project
Edit to manifest file located in WebContent > META-INF and add the next on a new row : 'WebLogic-Application-Version: v1′
Package the service and deploy it in the console

Deployment

Go to the Weblogic Console > Deployments. Click 'Lock & Edit' and in the deployments part click Install
Select the just created archive
Install this deployment as an application
Optional Settings. And in here we will see the 'Archive Version' of our application. Change the name to 'MyService' and leave the rest on default value

If you look in the list of deployments we will see our application is labeled with a version indication (v1).

The current version is still active.

Now create a new version of the application and change the v1 in the manifest file to v2, and package it.

Update Deployment

Go to the Weblogic Console > Deployments. Click 'Lock & Edit', select the application we want to update (MyService) and in the deployments part click Update
Click Change Path of the source path and select the just created archive (v2), the application will be deployed as version v2

If we now look in the list of deployments, we will see 2 versions of our application deployed.

Version v1 gets status 'Retired' and the new version v2 will get status 'Active'.

Running instances
We have the next scenarios

Version v1 is deployed. Deploy version v2. The new version v2 will get status 'Active' and the old version v1 will get status 'Retired'.
Since there aren't any open sessions Weblogic will recognize this and changed the status of the version v1
Version v1 is deployed and has open sessions. Deploy version v2. The new version v2 will get status 'Active' and the old version v1 will stay on status 'Active' untill all sessions to it will be closes. After that, Weblogic will change the status to 'Retired' and the only 'Active' version will be v2

Text borrowed from:

- Eric Elzinga's blog (http://eelzinga.wordpress.com/)

A video tutorial on:

- http://download.oracle.com/otn_hosted_doc/wls/redeployment/wls-side-by-side-non-annotation_viewlet_swf.html

Offline WLST script to create domain in WLS 11gR1

2009-10-04T15:48:00.004+05:30

---

Posted by Unni on Sun 4 Oct 11:15
download

# This is an Offline  WLST script to create a WLS 10.3.1 (Oracle Weblogic Server 11gR1) Domain
#
# Domain consists of:
# 1. Admin Server
# 2. Two Managed Servers
# 3. A Cluster with Two Managed Server
# 4. An application deployed to the cluster
 
# Read a domain template
 
print('Reading Template - D:/Oracle/11gR1/one/wlserver_10.3/common/templates/domains/wls.jar')
readTemplate('D:/Oracle/11gR1/one/wlserver_10.3/common/templates/domains/wls.jar')
 
# Admin Server
print('Creating Server - Admin Server')
cd('Servers/AdminServer')
set('ListenAddress','localhost')
set('ListenPort', 7001)
 
create('AdminServer','SSL')
cd('SSL/AdminServer')
set('Enabled', 'True')
set('ListenPort', 7002)
 
# Security
print('Creating Password')
cd('/')
cd('Security/base_domain/User/weblogic')
cmo.setPassword('welcome1')
 
# Start Up
print('Setting StartUp Options')
setOption('CreateStartMenu', 'false')
setOption('ServerStartMode', 'dev')
setOption('JavaHome','D:/Oracle/11gR1/one/jrockit_160_05_R27.6.2-20')
setOption('OverwriteDomain', 'true')
 
# Create Domain to File System
print('Writing Domain To File System')
writeDomain('D:/Oracle/11gR1/one/user_projects/domains/OfflineDomain_WLST')
closeTemplate()
 
# Read the Created Domain
print('Reading the Domain from In Offline Mode')
readDomain('D:/Oracle/11gR1/one/user_projects/domains/OfflineDomain_WLST')
 
# Creating Managed Servers
print('Creating Server - MS1 on Port # 8001')
cd('/')
create('MS1', 'Server')
cd('Server/MS1')
set('ListenPort', 8001)
set('ListenAddress', 'localhost')
 
print('Creating Server - MS2 on Port # 8011')
cd('/')
create('MS2', 'Server')
cd('Server/MS2')
set('ListenPort', 8011)
set('ListenAddress', 'localhost')
 
# Create and configure a cluster and assign the Managed Servers to that cluster.
print('Creating Cluster - WLSTCluster and adding MS1, MS2')
cd('/')
create('WLSTCluster', 'Cluster')
assign('Server', 'MS1,MS2','Cluster','WLSTCluster')
cd('Cluster/WLSTCluster')
set('MulticastAddress', '237.0.0.101')
set('MulticastPort', 8050)
set('WeblogicPluginEnabled', 'true')
 
 
# Create a new application deployment - Deployment Archive : "d:/Lou/VersionInfo.war"
print('Deploying application named VersionInfo from d:\Lou\VersionInfo.war')
cd('/')
myApp=create('VersionInfo', 'AppDeployment')
myApp.setSourcePath('d:/Lou/VersionInfo.war')
assign('AppDeployment', 'VersionInfo', 'Target', 'WLSTCluster')
 
# updating the changes
print('Finalizing the changes')
updateDomain()
closeDomain()
 
# Exiting
print('Exiting...')
exit()
 
# Code written by:
# Unnikrishnan Pillai

---

WLST on Weblogic 8.1

2009-07-08T18:09:00.003+05:30

This posting is a reply to the below query which was asked to me sometime back by one of my virtual friends (Karoly Nador).

In WLS 9.0 onwards WLST in inbuild with weblogc.jar, but for WLS 8.1 you would need use the jython.jar and wlst.jar files in order to run WLST.

Download link : http://www.4shared.com/file/116721496/8c3533ea/WLST_WLS_81.html

You will have to add both these files in the beginning of the CLASSPATH varibale in setWLSenv.cmd/.sh

Eg: set CLASSPATH=C:\Installer\wlst_v62\jython.jar;C:\Installer\wlst_v62\wlst.jar;C:\Installer\wlstExplorer\wlstExplorer.jar;%WEBLOGIC_CLASSPATH%;%CLASSPATH%

How to run:

1. Open a new command window

2. Run the 'setWLSenv.cmd/.sh' script to set the enviroment variables

3. invoke WLST in interavtive mode using the follwowing command : 'java weblogic.WLST'

---------- Forwarded message ----------

From: Karoly Nador(xxx@googlemail.com);

Date: Wed, Jul 8, 2009 at 2:04 PM

Subject: Wlst.jar for Weblogic 8.1

To: unni@unnikrishnanpillai.tk

Hi Unni,

i read your blog, and you make a really good job.

We would solve many of our problems, if we would use the wlst utility, but i can't find it for the Weblogic 8.1

We use PeopleSoft 8.48, and with this is weblogic 8.1 delivered. The old bea-Sites are down, from there i can't download it.

Do you have any idea, where can i download it?

Thanks in advance.

Best regards from Germany

Karoly Nador

WLST script to change logging setting for all server in the domain

2009-04-17T06:22:00.006+05:30

A continuation of previous post … with a logic which would make changes to all the servers in the domain

Written by Unni on Fri 17 Apr 06:30(IST)
download

connect('weblogic','weblogic','t3://localhost:7001')
 
edit()
startEdit()
 
svrs = adminHome.getMBeansByType('Server')
for s in svrs:
   name = s.getName()
           cd('/Servers/' + name + '/Log/' + name) 
   cmo.setNumberOfFilesLimited(true)
   cmo.setFileCount(100)
   cmo.setDomainLogBroadcastSeverity('Warning')
   cmo.setMemoryBufferSeverity('Warning')
   cmo.setLogFileSeverity('Warning')
   cmo.setStdoutSeverity('Warning')
 
activate()
disconnect()

Time to sleep... Gud Nite :)

Unni

WLST script to change logging setting for AdminServer

2009-04-16T06:38:00.008+05:30

This posting answers the questions asked in http://forums.oracle.com/forums/thread.jspa?forumID=570&threadID=886625

Written by Unni on Thu 16 Apr 18:55(IST)
download

print('Connectting to Admin Server')
connect('weblogic','weblogic','t3://localhost:7001')
 
print('Stating a New Edit Session')
edit()
startEdit()
 
print('Navigating to Servers/AdminServer/Log/AdminServer MBean')
cd('/Servers/AdminServer/Log/AdminServer')
 
print('Setting NumberOfFilesLimited to true')
cmo.setNumberOfFilesLimited(true)
 
print('Setting FileCount to 10')
cmo.setFileCount(10)
 
print('Setting DomainLogBroadcastSeverity to Critical')
cmo.setDomainLogBroadcastSeverity('Critical')
 
print('Setting MemoryBufferSeverity to Critical')
cmo.setMemoryBufferSeverity('Critical')
 
print('Setting LogFileSeverity to Info')
cmo.setLogFileSeverity('Info')
 
print('Setting StdoutSeverity to Error')
cmo.setStdoutSeverity('Error')
print('\n\n --- \n\n')
print('Navigating to Servers/AdminServer/WebServer/AdminServer/WebServerLog/AdminServer\n')
cd('/Servers/AdminServer/WebServer/AdminServer/WebServerLog/AdminServer')
 
print('Setting NumberOfFilesLimited to true')
cmo.setNumberOfFilesLimited(true)
 
print('Setting FileCount to 10\n\n')
cmo.setFileCount(15)
 
# Activate changes to the Domin Cofiguration
activate()
 
# Disconnect from Admin Server
disconnect()
 
# Exiting WLST
exit()

Cheers :)
Unni

A Motivational Quote - A Carrot, An Egg, & a Cup of Coffee - Reflections of True meaning of Life

2009-04-02T18:39:00.001+05:30

A Carrot, An Egg, & a Cup of Coffee-

Reflections of True meaning of Life

A young woman went to her mother and told her about her life and how things were so hard for her. She did not know how she was going to make it and wanted to give up, She was tired of fighting and struggling. It seemed as one problem was solved, a new one arose.

Her mother took her to the kitchen. She filled three pots with water and placed each on a high fire. Soon the pots came to boil. In the first she placed carrots, in the second she placed eggs, and in the last she placed ground coffee beans. She let them sit and boil; without saying a word.

In about twenty minutes she turned off the burners. She fished the carrots out and placed them in a bowl. She pulled the eggs out and placed them in a bowl. Then she ladled the coffee out and placed it in a bowl. Turning to her daughter, she asked, ' Tell me what you see.'

'Carrots, eggs, and coffee,' she replied.

Her mother brought her closer and asked her to feel the carrots. She did and noted that they were soft. The mother then asked the daughter to take an egg and break it. After pulling off the shell, she observed the hard boiled egg.

Finally, the mother asked the daughter to sip the coffee. The daughter smiled as she tasted its rich aroma. The daughter then asked, 'What does it mean, mother?'

Her mother explained that each of these objects had faced the same adversity: boiling water. Each reacted differently. The carrot went in strong, hard, and unrelenting. However, after being subjected to the boiling water, it softened and became weak. The egg had been fragile. Its thin outer shell had protected its liquid interior, but after sitting through the boiling water, its inside became hardened. The ground coffee beans were unique, however. After they were in the boiling water, they had changed the water.

'Which are you?' she asked her daughter. 'When adversity knocks on your door, how do you respond? Are you a carrot, an egg or a coffee bean?

Think of this: Which am I? Am I the carrot that seems strong, but with pain and adversity do I wilt and become soft and lose my strength?

Am I the egg that starts with a malleable heart, but changes with the heat? Did I have a fluid spirit, but after a death, a breakup, a financial hardship or some other trial, have I become hardened and stiff? Does my shell look the same, but on the inside am I bitter and tough with a stiff spirit and hardened heart?

Or am I like the coffee bean? The bean actually changes the hot water, the very circumstance that brings the pain. When the water gets hot, it releases the fragrance and flavor. If you are like the bean, when things are at their worst, you get better and change the situation around you. When the hour is the darkest and trials are their greatest do you elevate yourself to another level? How do you handle adversity?

Are you a carrot, an egg or a coffee bean?

The happiest of people don't necessarily have the best of everything; they just make the most of everything that comes along their way. The brightest future will always be based on a forgotten past; you can't go forward in life until you let go of your past failures and heartaches.

-Author Unknown

Multi Data Source using WLST

2009-03-02T19:35:00.003+05:30

A multi data source can be thought of as a pool of data sources. Multi data sources are best used for failover or load balancing between nodes of a highly available database system, such as redundant databases or Oracle Real Application Clusters (RAC).

Note that multi data sources do not provide any synchronization between databases. It is assumed that database synchronization is handled properly outside of WebLogic Server so that data integrity is maintained.

All data sources used by a multi data source to satisfy connection requests must be deployed on the same servers and clusters as the multi data source. A multi data source always uses a data source deployed on the same server to satisfy connection requests. Multi data sources do not route connection requests to other servers in a cluster or in a domain.

This script creates a Multi Datasource (MDS1) with two DataSources (DS1 and DS2) and deploys it to a server 'AdminServer'.

Written by Unni on Mon 2 Mar 13:48
download

# File name: MDS-Create.py
# This python program would create a MultiDataSource - 'MDS1'
# and adds two datasources -'DS1' and 'DS2'
# and targets its to a Server - 'AdminServer'
# Please change the code as per your environment and needs
 
connect('weblogic','weblogic','t3://localhost:7001')
edit()
startEdit()
cd('/')
# creates a MultiDataSource named ‘MDS1’
cmo.createJDBCSystemResource('MDS1')
cd('/JDBCSystemResources/MDS1/JDBCResource/MDS1')
cmo.setName('MDS1')
cd('/JDBCSystemResources/MDS1/JDBCResource/MDS1/JDBCDataSourceParams/MDS1')
# sets the JNDI name of the multi datasource to 'MDS1'
set('JNDINames',jarray.array([String('MDS1')], String))
# sets the algorithm type to failover
# Refer this link for valid values
# http://edocs.bea.com/wls/docs100/wlsmbeanref/mbeans/JDBCDataSourceParamsBean.html#AlgorithmType
cmo.setAlgorithmType('Failover')
# IMPORTANT -> Adds two datasources 'DS1' and 'DS2'  to the multi datasource
cmo.setDataSourceList('DS1,DS2')
cd('/JDBCSystemResources/MDS1')
# targets the MDS Server - 'AdminServer'
set('Targets',jarray.array([ObjectName('com.bea:Name=AdminServer,Type=Server')], ObjectName))
activate()
 
print('Exiting...')
 
exit()
 
# Code written by:
# Unnikrishnan Pillai

Hope this helps :)

Unni

unni@unnikrishnanpillai.tk

Session Counts using WLST

2009-02-22T00:07:00.003+05:30

Someone asked me this question few days back:
Is there a way to find out the number of http sessions using WLST? I can query this information by clicking on Deployments and then clicking on Monitoring tab in Admin console.

Here's the answer:

There is a MBEAN in the 'RunTimeMbeans' named 'WebAppComponentRuntimeMBean', which has these three attributes for retrieving session count related info:

OpenSessionsCurrentCount: Provides a count of the current total number of open sessions in this module.
SessionsOpenedTotalCount: Provides a count of the total number of sessions opened.
OpenSessionsHighCount: Provides the high water mark of the total number of open sessions in this server.This count starts at zero each time the server is activated.
-

Written by Unni on Sat 21 Feb 18:27 (IST)
download

 # File Name : 'SessionCount.py'
 # Set the enviroment using 'setDomainEnv.cmd/sh'
 # Run the script using this command;
 # java weblogic.WLST SessionCount.py
 # Here - 'inmemrep' is the name of the app ; 'AdminServer' is the name of the server on which the app is deployed
 
 print 'Start of script...'
connect('weblogic','weblogic','t3://localhost:7001')
serverRuntime()
cd('/ApplicationRuntimes/inmemrep/ComponentRuntimes/AdminServer_/inmemrep')
n = get('Name')
x = get('OpenSessionsHighCount')
y = get('OpenSessionsCurrentCount')
z = get('SessionsOpenedTotalCount')
 
print 'Session Counts for ',n
print '\n------------'
print '\nOpenSessionsHighCount: ',x
print '\nOpenSessionsCurrentCount: ',y
print '\nSessionsOpenedTotalCount: ',z
 
print 'End of script...'
 
# Code written by:
# Unnikrishnan Pillai,
# Engineer,
# Oracle Global Support

Signing off...

Unni

unni@unnikrishnanpillai.tk

Creating a JDBC Data Source using WLST

2009-02-20T21:46:00.017+05:30

Hiya,

Last night I was trying to create a JDBC Data Source using WLST for one of my colleagues.
After a lot of hit-n-trial I was able to do it, so thought I would share it here.
May come handing sometime while writing scripts to automate domain creations. ;)

-

Written by Unni on Fri 20 Feb 15:13 (IST)
download

 # This python program would create a DataSource named 'DS1' and targets it to (AdminServer and MS).
# Please change the code as per your environment and needs:
# Change the username and password with admin username and password.
 
#please change the localhost:7001 with he ip address:portnumber
 
print('Starting...')
connect('weblogic','weblogic','t3://localhost:7001')
print('Starting a edit session')
edit()
startEdit()
 
# Create a new Mbean ( a JDBC resource)
cd('/')
cmo.createJDBCSystemResource('DS1')
 
#Naming the datasource
cd('/JDBCSystemResources/DS1/JDBCResource/DS1')
cmo.setName('DS1')
 
#Setting JNDI name
cd('/JDBCSystemResources/DS1/JDBCResource/DS1/JDBCDataSourceParams/DS1')
set('JNDINames',jarray.array([String('DS1')], String))
 
cd('/JDBCSystemResources/DS1/JDBCResource/DS1/JDBCDriverParams/DS1')
cmo.setUrl('jdbc:pointbase:server://localhost:9092/demo')
cmo.setDriverName('com.pointbase.xa.xaDataSource')
cmo.setPassword('PBPUBLIC')
 
 
 #Set Connection Pool specific parameters
 # refer: e-docs.bea.com/wls/docs92/wlsmbeanref/mbeans/JDBCConnectionPoolParamsBean.html
cd('/JDBCSystemResources/DS1/JDBCResource/DS1/JDBCConnectionPoolParams/DS1')
cmo.setTestConnectionsOnReserve(true)
cmo.setTestTableName('SYSTABLES')
cmo.setConnectionReserveTimeoutSeconds(25)
cmo.setMaxCapacity(20)
cmo.setConnectionReserveTimeoutSeconds(10)
cmo.setTestFrequencySeconds(360)
 
# Setting the user name
cd('/JDBCSystemResources/DS1/JDBCResource/DS1/JDBCDriverParams/DS1/Properties/DS1')
cmo.createProperty('user')
cd('/JDBCSystemResources/DS1/JDBCResource/DS1/JDBCDriverParams/DS1/Properties/DS1/Properties/user')
cmo.setValue('PBPUBLIC')
 
# Setting the database name
cd('/JDBCSystemResources/DS1/JDBCResource/DS1/JDBCDriverParams/DS1/Properties/DS1')
cmo.createProperty('databaseName')
cd('/JDBCSystemResources/DS1/JDBCResource/DS1/JDBCDriverParams/DS1/Properties/DS1/Properties/databaseName')
cmo.setValue('jdbc:pointbase:server://localhost:9092/demo')
 
# Transaction
cd('/JDBCSystemResources/DS1/JDBCResource/DS1/JDBCDataSourceParams/DS1')
cmo.setGlobalTransactionsProtocol('TwoPhaseCommit')
 
cd('/JDBCSystemResources/DS1')
# targets the DS1 to Servers(AdminServer,MS)
set('Targets',jarray.array([ObjectName('com.bea:Name=AdminServer,Type=Server'), ObjectName('com.bea:Name=MS,Type=Server')], ObjectName))
 
 
 activate()
  
 
print('Exiting...')
 
exit()
 
# Code written by:
# Unnikrishnan Pillai,
# Engineer,
# Oracle Global Support

-
MultiDataSources coming soon....

Now have 2 get back to work ;)

Unni

unni@unnikrishnanpillai.tk

WLST made easy ... easeSyntax() ...

2009-02-08T01:33:00.007+05:30

Are you frustrated of adding ‘( )’ to the end of ‘ls’ every time you had to view the list of ‘Child MBeans and Attributes’ or when using ‘cd’ to navigate through Mbeans ?

SATYA (WLST’s author) recently relieved a new (he kept it a secret till now) feature which can help you in reducing all that keystrokes which you waste when typing the '(' and ')' 's

Introducing the easeSyntax() command

You can supply the easeSyntax() command after starting WLST in interactive mode to ease the python syntax.

How To | List the attributes, operations, and cmo's

Without easeSyntax() | ls()

After Turning ON easeSyntax | ls

How To | Navigate Mbean the hierarchy

Without easeSyntax() | cd('ApplicationRuntimes/inmemrep/ComponentRuntimes')

After Turning ON easeSyntax | cd ApplicationRuntimes/inmemrep/ComponentRuntimes

How To | Navigate back to a parent Mbean

Without easeSyntax() | cd('..')

After Turning ON easeSyntax | cd ..

How To | Get / Retrieve the value of an Attribute

Without easeSyntax() | get('SessionTimeoutSecs')

After Turning ON easeSyntax | get SessionTimeoutSecs

Easy syntax will not function properly in script mode and when used in loops. You can still use the regular jython syntax although you have opted for easy syntax ... says Satya :)

So Bye bye... ‘( )'

Welcome... ‘easeSyntax()’

Thank u Satya :)

Happy scripting… :)

Unni

unni@unnikrishnanpillai.tk

How To: Configure a Managed Server as a Windows Service in 5 Simple Steps

2009-02-07T20:56:00.005+05:30

1. Create a copy of 'installSvc.cmd' and name it 'installSvcMS.cmd'

2. Replace the line in the file which calls the 'beasvc' command with the below given line:

"%WL_HOME%\server\bin\beasvc" -install -svcname:"%DOMAIN_NAME%_%SERVER_NAME%" -depend:"domain92_AdminServer" -delay:"120000" -javahome:"%JAVA_HOME%" -execdir:"%USERDOMAIN_HOME%" -extrapath:"%WL_HOME%\server\bin" -password:"%WLS_PW%" -cmdline:%CMDLINE%

3. Here,

i. '-depend:"domain92_AdminServer"' is the name of the Administration Server Windows service. To verify the service name, look on the Windows Services Control Panel.('services.msc')

ii. '-delay:"120000"' is the time delay you want between the starting of admin server and managed server.

4. Open a text editor and Copy – Paste the text given below into the editor:

SETLOCAL

set WL_HOME=C:\bea\weblogic92

set DOMAIN_NAME=domain92

set USERDOMAIN_HOME=C:\bea\user_projects\domains\domain92_JDK5

set SERVER_NAME= ManagedServer

set WLS_USER=weblogic

set WLS_PW=weblogic

set PRODUCTION_MODE=false

set ADMIN_URL=http://10.10.10.71:7001

call "C:\bea\weblogic92\server\bin\installSvcMS.cmd"

ENDLOCAL

Here,

i. WL_HOME is the directory in which you have installed Weblogic

ii. DOMAIN_NAME is the name for your WLS domain

iii. SERVER_NAME is the name of an existing Managed Server that you want set up as a Windows service.

iv. WLS_USER and WLS_PASS are the credentials you pass for staring the server

v. PRODUCTION_MODE is the mode in which want to start the server (if true server starts in production ; if false it would start in development)

vi. ADMIN_URL is the path to admin server

5. Save the file as 'myScriptMS.cmd' in'C:\bea\weblogic92\server\bin' and Run the 'myScriptMS.cmd'.

Open 'services.msc' and select the service named something like 'beasvc domain92_ManagedServer' and start it, if it starts fine it means that the Weblogic Server as started fine.

Official documentation : http://e-docs.bea.com/wls/docs100/server_start/winservice.html

I hope it helps :)

Unni

unni@unnikrishnanpillai.tk

A blog on Weblogic Server by upillai

Tuning JRockit

Weblogic Server Administration Server Interview Questions 1 of 6

Add and Remove targets

Configuring JMS Bridges on Weblogic Server

Using WLS 8.1 Threading Model in WLS 9.x / 10.x

Why sub-deployments are used?

Delete Admin Server for a running Weblogic domain

Use 'userConfigFile' for connecting to weblogic

Basic Unix commands

WLST Script to enabe Log4j Logger on a weblogic server

Posted by Unni# Start WLST

A Collection of SUN JVM Options

BEA-000388 - JVM called WLS shutdown hook. The server will force shutdown now

Infinite loop in hasmap.put caused high CPU usage stuck threads

< Reached maximum capacity of pool "MyPoolDS", making "0" new resource instances instead of "10".>

Weblogic side by side deployment

Offline WLST script to create domain in WLS 11gR1

Posted by Unni on Sun 4 Oct 11:15download

WLST on Weblogic 8.1

WLST script to change logging setting for all server in the domain

Written by Unni on Fri 17 Apr 06:30(IST)download

WLST script to change logging setting for AdminServer

Written by Unni on Thu 16 Apr 18:55(IST)download

A Motivational Quote - A Carrot, An Egg, & a Cup of Coffee - Reflections of True meaning of Life

A Carrot, An Egg, & a Cup of Coffee-

Reflections of True meaning of Life

Multi Data Source using WLST

Written by Unni on Mon 2 Mar 13:48download

Session Counts using WLST

Written by Unni on Sat 21 Feb 18:27 (IST)download

Creating a JDBC Data Source using WLST

Written by Unni on Fri 20 Feb 15:13 (IST)download

WLST made easy ... easeSyntax() ...

How To: Configure a Managed Server as a Windows Service in 5 Simple Steps

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Written by Unni on Fri 20 Feb 15:13 (IST)
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