SA-3326

Summary

User has configured File Listener to monitor and process files from UNIX NFS mount. This File Listener is running on multi-nodes crashes quite frequently and requires manual restart.

Error Messages

2014-09-18 10:10:16,045 [node02,maxpri=10]] [ STANDARD] [ ] ( services.file.FileListener) ERROR File.BulkUploadFile [email protected] - Unexpected exception caught during processing.
java.lang.Exception: [/transfer/files/inbound] exists, but it is not a directory.
at com.pega.pegarules.integration.engine.internal.services.file.FileListener.initialize(FileListener.java:1829)
at com.pega.pegarules.integration.engine.internal.services.file.FileListener.run_(FileListener.java:1899)
at com.pega.pegarules.integration.engine.internal.services.listener.ServiceListenerBaseImpl.run(ServiceListenerBaseImpl.java:445)
at com.pega.pegarules.session.internal.engineinterface.etier.impl.AsyncServant.processAsyncTask(AsyncServant.java:186)
at com.pega.pegarules.session.internal.engineinterface.etier.impl.AsyncServant.invoke(AsyncServant.java:151)
at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl._invokeEngine_privact(EngineImpl.java:315)
at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl.invokeEngine(EngineImpl.java:266)
at com.pega.pegarules.session.internal.engineinterface.etier.ejb.EngineBean.invokeEngine(EngineBean.java:239)
at sun.reflect.GeneratedMethodAccessor51.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:619)
at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethod(PRBootstrap.java:348)
at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethodPropagatingThrowable(PRBootstrap.java:389)
at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethodPropagatingException(PRBootstrap.java:411)
at com.pega.pegarules.internal.etier.ejb.EngineBeanBoot.invokeEngine(EngineBeanBoot.java:171)
at com.pega.pegarules.internal.etier.interfaces.EJSLocalStatelessEngineBMT_f2439d86.invokeEngine(Unknown Source)
at com.pega.pegarules.session.internal.engineinterface.etier.mdb.PRAsync.processRequest(PRAsync.java:154)
at com.pega.pegarules.session.internal.engineinterface.etier.asynchbeans.AsyncTask.run(AsyncTask.java:63)
at com.pega.pegarules.session.internal.engineinterface.etier.asynchbeans.RunnableWrapper.run(RunnableWrapper.java:70)
at com.ibm.ws.asynchbeans.J2EEContext$RunProxy.run(J2EEContext.java:261)
at java.security.AccessController.doPrivileged(AccessController.java:297)
at javax.security.auth.Subject.doAs(Subject.java:495)
at com.ibm.websphere.security.auth.WSSubject.doAs(WSSubject.java:118)
at com.ibm.ws.asynchbeans.J2EEContext$DoAsProxy.run(J2EEContext.java:328)
at java.security.AccessController.doPrivileged(AccessController.java:326)
at com.ibm.ws.asynchbeans.J2EEContext.run(J2EEContext.java:757)
at com.ibm.ws.asynchbeans.WorkWithExecutionContextImpl.go(WorkWithExecutionContextImpl.java:218)
at com.ibm.ws.asynchbeans.ABWorkItemImpl.run(ABWorkItemImpl.java:158)
at java.lang.Thread.run(Thread.java:813)

Root Cause

File Listener polling interval in PRPC by default has been set as 60 seconds which may not be suitable for multi-node environment. When the File Listener is up and running, each time, configured Polling interval lapses, it checks the folder location for files to process. If it finds any file(s), it picks them up for processing. Lower polling interval caused the breaking of threads resulting File Listener crash in multi-node environment.

Resolution

Suggested user to increase the File Listener polling interval to a higher value (say 900 seconds) suitable to the File Listener processing on a multi-node environment.