Print PDF and RQM Server Health/Performance - what is the relation

We started noticing lot of Out of memory errors and Print PDF errors in our RQM logs. Some of them are

ERROR com.ibm.rqm.print.service.engine.PrintEngine - the command "----.pdf" reports that it has failed.

javax.print.PrintException: The print command (----.pdf) completed successfully, but the PrintEngine was unable to save the results to the repository

at com.ibm.rqm.print.service.engine.PrintEngine.executionSucceeded(PrintEngine.java:333)

        at com.ibm.rqm.print.service.engine.command.PrintCommand.notifyExeSucceeded(PrintCommand.java:330)

        at com.ibm.rqm.print.service.engine.command.PrintCommand.run(PrintCommand.java:249)

        at com.ibm.rqm.print.service.engine.command.PrintCommandTask.transactionSucceeded(PrintCommandTask.java:59)

        at sun.reflect.GeneratedMethodAccessor484.invoke(Unknown Source)

        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

        at java.lang.reflect.Method.invoke(Method.java:600)

        at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord.invoke(ExportProxyServiceRecord.java:370)

        at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord.access$0(ExportProxyServiceRecord.java:356)

        at org.eclipse.soda.sat.core.internal.record.ExportProxyServiceRecord$ExportedServiceInvocationHandler.invoke(ExportProxyServiceRecord.java:56)

        at $Proxy1635.transactionSucceeded(Unknown Source)

        at com.ibm.team.repository.service.internal.AsynchronousTaskSchedulerService$2.transactionSucceeded(AsynchronousTaskSchedulerService.java:825)

        at com.ibm.team.repository.service.internal.AsynchronousTaskSchedulerService$2.executeTask(AsynchronousTaskSchedulerService.java:834)

        at com.ibm.team.repository.service.internal.scheduler.AsynchronousTaskRunner.runTask(AsynchronousTaskRunner.java:136)

        at com.ibm.team.repository.service.internal.scheduler.AsynchronousTaskRunner.run(AsynchronousTaskRunner.java:99)

        at java.lang.Thread.run(Thread.java:736)

Caused by:

com.ibm.team.repository.common.ItemNotFoundException: CRJAZ0215I The following record was not found in the database: com.ibm.rqm.print.common.model.impl.PrintJobHandleImpl@3e563e56 (stateId: <unset>, ite

mId: [UUID _M6t0EGDzEeKwXZQOK2LTtQ], origin: null, immutable: <unset>)

======================================

[jazz: AsynchronousTaskRunner-13] WARN org.apache.fop.apps.FOUserAgent - The following feature isn't implemented by Apache FOP, yet: table-layout="auto" (on f

o:table) (No context info available)

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00032326 SystemErr R (Location of error unknown)java.lang.StringIndexOutOfBoundsException: String index out of range: 4

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We Do see lot many instances of these errors. What might be causing these.

I also see From the RQM server statistics page, some of the “Print” services and tasks stays very high. All these parameters stay high.

Is there any baseline of these numbers to compare with?

What is the relationship between Print PDF tasks and RQM server health and perfroamnce?

Any suggestions to resolve these?