Support Article
Timeout borrowing issue arising when agent runs
SA-13567
Summary
Getting below error in the logs:
07:46:35,037 [fault (self-tuning)'] ( internal.mgmt.PREnvironment) ERROR AAUNSWM86|10.30.29.4|HTTP|Monitor|Services|HTTPMonitor - Problem obtaining requestor from
Error Messages
06:55:25,550 [fault (self-tuning)'] ( internal.mgmt.RequestorPool) ERROR AAUNSWM86|10.30.29.4|HTTP|Services|HTTPMonitor - Timed out borrowing service requestor from requestor pool
06:55:25,550 [fault (self-tuning)'] ( internal.mgmt.PREnvironment) ERROR AAUNSWM86|10.30.29.4|HTTP|Monitor|Services|HTTPMonitor - Problem obtaining requestor from ServiceRequestorPool
com.pega.pegarules.pub.PRException: Timed out borrowing service requestor from requestor pool
From: (unknown)
at com.pega.pegarules.session.internal.mgmt.RequestorPool.borrowRequestor(RequestorPool.java:467)
at com.pega.pegarules.session.internal.mgmt.RequestorPoolManager.borrowRequestor(RequestorPoolManager.java:58)
at com.pega.pegarules.session.internal.PRSessionProviderImpl.borrowRequestor(PRSessionProviderImpl.java:557)
at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:800)
at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:730)
at com.pega.pegarules.integration.engine.internal.services.ServiceAPI.getServiceMethod(ServiceAPI.java:2518)
at com.pega.pegarules.integration.engine.internal.services.ServiceAPI.preLockSetup(ServiceAPI.java:949)
at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequest(EngineAPI.java:331)
at com.pega.pegarules.integration.engine.internal.services.http.HTTPService.invoke(HTTPService.java:315)
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.GeneratedMethodAccessor99.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
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.ejb.EngineBMT_h449u3_ELOImpl.invokeEngine(EngineBMT_h449u3_ELOImpl.java:299)
at com.pega.pegarules.priv.context.JNDIEnvironment.invokeEngineInner(JNDIEnvironment.java:280)
at com.pega.pegarules.priv.context.JNDIEnvironment.invokeEngine(JNDIEnvironment.java:225)
at com.pega.pegarules.web.impl.WebStandardImpl.makeEtierRequest(WebStandardImpl.java:343)
at com.pega.pegarules.web.impl.WebStandardImpl.doPost(WebStandardImpl.java:236)
at sun.reflect.GeneratedMethodAccessor100.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
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.invokeMethod(PRBootstrap.java:438)
at com.pega.pegarules.internal.web.servlet.WebStandardBoot.doPost(WebStandardBoot.java:102)
at com.pega.pegarules.internal.web.servlet.WebStandardBoot.doGet(WebStandardBoot.java:92)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3498)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(Unknown Source)
at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2180)
at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2086)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1406)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
Caused by: java.util.NoSuchElementException: Timeout waiting for idle object
at com.pega.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:751)
at com.pega.pegarules.session.internal.mgmt.RequestorPool.borrowRequestor(RequestorPool.java:458)
Root Cause
Service Activity calls result in DB queries that take long time to complete and the Service Package is defined as Authenticated Stateless(HTTP) so burst of messages quickly consume all the App requestors available in the pool resulting in failure to borrowRequestor.
Resolution
Perform the following local-change:
Increase the values of your ServicePackage > Pooling as below.
Maximum Idle Requestors : 50
Maximum Idle Requestors : 50
Maximum Wait (in seconds): 50
These are the values set by default to 10 in PRPC, which needs to be changed as per the load that is expected in user's production.
Published August 27, 2015 - Updated October 8, 2020
Have a question? Get answers now.
Visit the Collaboration Center to ask questions, engage in discussions, share ideas, and help others.