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Application down frequently

SA-75765

Summary



Multiple threads are generated, maximum heap is utilized, and nodes are terminated. Hence, the application stops working frequently.


Error Messages



one of the thread dump from 15th logs -- Thread Dump Complete --- [ttp-apr-8080-exec-13] [ ] [ ] [ ] (ngineinterface.service.HttpAPI) ERROR abc-stg2.pegacloud.io|127.0.0.1 - : com.pega.pegarules.pub.context.RequestorLockException com.pega.pegarules.pub.context.RequestorLockException: Unable to synchronize on requestor HDC9C5215C9315B390DAC721E7662F17D within 120 seconds: (thisThread = http-apr-8080-exec-13) (originally locked by = http-apr-8080-exec-24) (finally locked by = http-apr-8080-exec-24) at com.pega.pegarules.session.internal.PRSessionProviderImpl.getLockOnRequestor(PRSessionProviderImpl.java:1479) at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:1024) at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:893) at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequest(EngineAPI.java:331) at com.pega.pegarules.session.internal.engineinterface.service.HttpAPI.invoke(HttpAPI.java:825) at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl._invokeEngine_privact(EngineImpl.java:327) at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl.invokeEngine(EngineImpl.java:270) at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl.invokeEngine(EngineImpl.java:247) at com.pega.pegarules.priv.context.JNDIEnvironment.invokeEngineInner(JNDIEnvironment.java:278) at com.pega.pegarules.priv.context.JNDIEnvironment.invokeEngine(JNDIEnvironment.java:223) at com.pega.pegarules.web.impl.WebStandardImpl.makeEtierRequest(WebStandardImpl.java:594)


Steps to Reproduce



Not Applicable


Root Cause



A defect in Pegasystems’ code or rules.


Resolution



As a local-change, increase the number of nodes.

Published August 19, 2019 - Updated October 8, 2020

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