2042646 - IDOCs are not sent to PI intermittently

IDOCs can't be sent from an external system to PI using IDOC AAE.  This happens randomly on different server nodes. Every time it happens, a server restart is required in order to get rid of it. You may notice the following error in the corresponding default trace:

com.sap.conn.jco.JCoException: (104) JCO_ERROR_SYSTEM_FAILURE: Commit fault: ASJ.ejb.005043 (Failed in component: sap.com/com.sap.aii.adapter.idoc.app, BC-XI-CON-IDO) Exception raised from invocation of public void com.sap.aii.af.idoc.inbound.IDocReceiverBean.onCommit(java.lang.String) method on bean instance com.sap.aii.af.idoc.inbound.IDocReceiverBean@1bfafc25for bean sap.com/com.sap.aii.adapter.idoc.app*xml|com.sap.aii.adapter.idoc.ejb.jar*xml|IDocReceiverBean in application sap.com/com.sap.aii.adapter.idoc.app.; nested exception is: com.sap.conn.idoc.IDocRuntimeException (raised by system [xxxxxxxxx|xxxxxxxxxx]) 
at com.sap.conn.jco.rt.MiddlewareJavaRfc.generateJCoException(MiddlewareJavaRfc.java:678) 
at com.sap.conn.jco.rt.MiddlewareJavaRfc$JavaRfcServer.listen(MiddlewareJavaRfc.java:2513) 
at com.sap.conn.jco.rt.DefaultServerWorker.dispatch(DefaultServerWorker.java:254) 
at com.sap.conn.jco.rt.DefaultServerWorker.loop(DefaultServerWorker.java:345) 
at com.sap.conn.jco.rt.DefaultServerWorker.run(DefaultServerWorker.java:232) 
at com.sap.mw.jco.jra.JRA$ReaderThread.run(JRA.java:8628)
at com.sap.engine.services.connector.jca15.work.TaskImpl.run(TaskImpl.java:245) 
at com.sap.engine.core.thread.execution.Executable.run(Executable.java:122) 
at com.sap.engine.core.thread.execution.Executable.run(Executable.java:101) 
at com.sap.engine.core.thread.execution.CentralExecutor$SingleThread.run(CentralExecutor.java:328)

The below error may also appear in the dev_jco_rfc trace:

RfcException raised by system [xxxxxxxxx|xxxxxxxxxx]:    message: Commit fault: ASJ.ejb.005043 (Failed in component: sap.com/com.sap.aii.adapter.idoc.app, BC-XI-CON-IDO) Exception raised from invocation of public void com.sap.aii.af.idoc.inbound.IDocReceiverBean.onCommit(java.lang.String) method on bean instance com.sap.aii.af.idoc.inbound.IDocReceiverBean@4480901e for bean sap.com/com.sap.aii.adapter.idoc.app*xml|com.sap.aii.adapter.idoc.ejb.jar*xml|IDocReceiverBean in application sap.com/com.sap.aii.adapter.idoc.app.; nested exception is: com.sap.conn.idoc.IDocRuntimeException
return code: RFC_FAILURE (1)    error group: 104    key: RFC_ERROR_SYSTEM_FAILURE

• SAP NetWeaver 7.3
• SAP enhancement package 1 for SAP NetWeaver 7.3