Limiting the growth of Java virtual machine log files using scripting

 

Procedure

1. Start wsadmin

2. Identify the application server and assign it to the server1 variable, for example:

   • Jacl

     set s1 [$AdminConfig getid /Cell:mycell/Node:mynode/Server:server1/]
     

   • Jython

     s1 = AdminConfig.getid('/Cell:mycell/Node:mynode/Server:server1/')
     print s1
     

   where:

   set	is a Jacl command
   s1	is a variable name
   $	is a Jacl operator for substituting a variable name with its value
   AdminConfig	is an object representing the WAS configuration
   getid	is an AdminConfig command
   Cell	is the object type
   mycell	is the name of the object that will be modified
   Node	is the object type
   mynode	is the name of the object that will be modified
   Server	is the object type
   server1	is the name of the object that will be modified
   print	a Jython command

   Example output

   server1(cells/mycell/nodes/mynode/servers/server1|server.xml#Server_1)
   

3. Identify the stream log and assign it to the log variable, for example:

   • The following example identifies the output stream log:

     • Using Jacl

       set log [$AdminConfig showAttribute $s1 outputStreamRedirect]
       

     • Using Jython

       log = AdminConfig.showAttribute(s1, 'outputStreamRedirect')
       

   • The following example identifies the error stream log:

     • Using Jacl

       set log [$AdminConfig showAttribute $s1 errorStreamRedirect]
       

     • Using Jython

       log = AdminConfig.showAttribute(s1, 'errorStreamRedirect')
       

   Example output

   (cells/mycell/nodes/mynode/servers/server1|server.xml#StreamRedirect_2)
   

4. List the current values of the stream log, for example:

   • Using Jacl

     $AdminConfig show $log
     

   • Using Jython

     AdminConfig.show(log)
     

   Example output

   {baseHour 24}
   {fileName ${SERVER_LOG_ROOT}/SystemOut.log}
   {formatWrites true}
   {maxNumberOfBackupFiles 1}
   {messageFormatKind BASIC}
   {rolloverPeriod 24}
   {rolloverSize 1}
   {rolloverType SIZE}
   {suppressStackTrace false}
   {suppressWrites false}
   

5. Modify the rotation policy for the stream log.

   • The following example sets the rotation log file size to two megabytes:

     • Using Jacl

       $AdminConfig modify $log {{rolloverSize 2}}
       

     • Using Jython

       AdminConfig.modify(log, ['rolloverSize', 2])
       

   • The following example sets the rotation policy to manage itself. It is based on the age of the file with the rollover algorithm loaded at midnight, and the log file rolling over every 12 hours:

     • Using Jacl

       $AdminConfig modify $log {{rolloverType TIME} {rolloverPeriod 12} {baseHour 24}}
       

     • Using Jython

       AdminConfig.modify(log, [['rolloverType', 'TIME'] ['rolloverPeriod', 12] ['baseHour', 24]])
       

   • The following example sets the log file to roll over based on both time and size:

     • Using Jacl

       $AdminConfig modify $log {{rolloverType BOTH} {rolloverSize 2} {rolloverPeriod 12} {baseHour 24}}
       $AdminConfig save
       

     • Using Jython

       AdminConfig.modify(log, [['rolloverType', 'BOTH'] ['rolloverSize', 2] ['rolloverPeriod', 12] ['baseHour', 24]])
       

6. In a network deployment environment only, synchronize the node.

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See Also

AdminConfig object for scripted administration

 

See Also

Commands for the AdminConfig object

 

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