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Support Article

RequestorLockException - Running Post Upgrade tools



After performing upgrade from PRPC 5.5 to Pega 7.1.5, Pega admin has run into "Internal Server Error" on the UI while running the following post upgrade tools:
  •  Lock and Roll
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Error Messages

[8/25/14 12:30:00:390 CDT] 00000011 SystemOut    O 2014-08-25 12:30:00,390 [  WebContainer : 12] [          ] [                    ] [                    ] (ngineinterface.service.HttpAPI) ERROR | Unable to synchronize on requestor H1FA3BBC1C4AA375146F1BB10106D0FE3 within 120 seconds: (thisThread = WebContainer : 12) (originally locked by = WebContainer : 5) (finally locked by = WebContainer : 0) 
  at com.pega.pegarules.session.internal.PRSessionProviderImpl.getLockOnRequestor( 
  at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked( 
  at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked( 
  at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequest( 
  at com.pega.pegarules.session.internal.engineinterface.service.HttpAPI.invoke( 
  at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl._invokeEngine_privact( 
  at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl.invokeEngine( 
  at com.pega.pegarules.session.internal.engineinterface.etier.ejb.EngineBean.invokeEngine( 
  at sun.reflect.GeneratedMethodAccessor55.invoke(Unknown Source) 
  at sun.reflect.DelegatingMethodAccessorImpl.invoke( 
  at java.lang.reflect.Method.invoke(

Root Cause

Root cause of the problem lies in Websphere plugin configuration causing a refresh on timeout before Pega finishes its backend processing.


ServerIOTimeout parameter is set to a value of 60 on Websphere plugin.
 As a result,  timeout errors occur while running post upgrade tools.
Change the IOServerOutput=1800 to resolve the issue.

Published October 19, 2015 - Updated October 8, 2020

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