Tuesday, December 13, 2011

Few managed servers automatically disconnect from datasource

Of the many managed servers from a single box targeted onto a datasource, a few would automatically
disconnect suddenly.


<Error> <Deployer> <BEA-149205> <Failed to initialize the application '*' due to error weblogic.application.ModuleException: .
weblogic.application.ModuleException:
      at weblogic.jdbc.module.JDBCModule.prepare(JDBCModule.java:302)
      at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:199)
      at weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:517)
      at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:52)
      at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:159)
      Truncated. see log file for complete stacktrace
Caused By: weblogic.common.ResourceException: weblogic.common.ResourceException: Could not create pool connection. The DBMS driver exception was: IO Error: Connection reset
      at weblogic.jdbc.common.internal.ConnectionEnvFactory.createResource(ConnectionEnvFactory.java:276)
      at weblogic.common.resourcepool.ResourcePoolImpl.makeResources(ResourcePoolImpl.java:1249)
      at weblogic.common.resourcepool.ResourcePoolImpl.makeResources(ResourcePoolImpl.java:1166)
      at weblogic.common.resourcepool.ResourcePoolImpl.start(ResourcePoolImpl.java:249)
      at weblogic.jdbc.common.internal.ConnectionPool.doStart(ConnectionPool.java:1154)
      Truncated. see log file for complete stacktrace


Enabled the parameter "Connection Creation Retry Frequency" to 60 in all the servers. which solved the issue, it will keep trying to reestablish connection every 60 secs, after there has been a disconnection of DB with weblogic. So every time DB gets disconnected, the weblogic reconnects to it within 60secs.

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