How to read weblogic tlog files ?

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Maxence Button's Blog | March 26, 2008   6:30 AM | Comments (5)

What are tlog files ?

Tlog files are the files used by weblogic to keep a trace of current transactions.

For example, when an instance is restarted, the tlog files are used to perform the second step of a two-phase commit on a transaction that was in progress.

Sometimes, when a transaction is corrupted, you've got to delete thes files to get rid of the phantom transaction.

There is no need to restart a server to have them recreated.

Where are they located ?

Tlog files are created for every server. You can thus find some in your server directory.

Ex : myDomain / servers / myServer / logs

How to read them ?

These files are not human-readable. But BEA provides a tool to decrypt them.

This tool is very useful to have a trace of running transactions, and know what's going on on your server.

Like every other tool BEA provides, it's part of the package "weblogic".

It can be found :

• on WLS 8.1 and below, in the weblogic.jar
• on WLS 9 and above, in the module com.bea.core.transaction_2.0.1.0.jar

Usage: java weblogic.transaction.internal.TransactionLoggerImpl <server_tlog_path>
    <server_tlog_path> - path of server transaction log files
    e.g. /weblogic/config/mydomain/myserver/myserver

To use it, I would advise to go directly where the tlog files are and type the following command :

\user_projects\sample\myserver > java weblogic.transaction.internal.TransactionLoggerImpl myserver

The result of this command should display something like that :

If available, the information will be displayed like shown below :

Comments

• Hi

  Maybe you should try to run setWLSEnv.sh first. ($WL_HOME/server/bin/setWLSEnv.sh)

  Tell me whether it works or not.

  Posted by: mbutton on May 28, 2008 at 4:40 AM

• Hi, I got error message when try following command: 1) root@vantage:/opt/bea70/user_projects/mydomain/node2# java weblogic.transaction.internal.TransactionLoggerImpl node2 or 2) root@vantage:/opt/bea70/user_projects/mydomain/node2# java weblogic.transaction.internal.TransactionLoggerImpl /opt/bea70/user_projects/mydomain/node2/ "Exception in thread "main" java.lang.NoClassDefFoundError: weblogic/transaction/internal/TransactionLoggerImpl" - Im using WLS70 SP7 (clustring server) on Ubuntu 710 - tlog file at /opt/bea70/user_projetcs/mydomain/node2 Please help!

  Posted by: penril01 on May 28, 2008 at 12:42 AM

• Thanks for the constructive input ! :)
  

  Posted by: mbutton on March 27, 2008 at 5:41 AM

• With well formatted tags ;-) On WebLogic 9.2 tlogs are in a file store. So the command is: cd yourDomainRootDirectory\bin setDomainEnv.cmd java weblogic.transaction.internal.StoreTransactionLoggerImpl .\servers\MywlsServerName\data\store\default MywlsServerName Yann

  Posted by: lodhas on March 27, 2008 at 4:16 AM

• On WebLogic 9.2 tlogs are in a file store. So the command is: cd yourDomainRootDirectory\bin setDomainEnv.cmd java weblogic.transaction.internal.StoreTransactionLoggerImpl .\servers\MywlsServerName\data\store\default MywlsServerName Yann

  Posted by: lodhas on March 27, 2008 at 4:14 AM