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Log errors about unhandled error in ETier invocation



Pega Marketing system is being upgraded from Pega 7.2.1 to 7.2.2. After the upgrade, large number of Etier errors began appearing in the logs.

Error Messages

Error message in Logs
2017-05-10 04:47:28,517 [0.65.24-8085-exec-73] [ ] [ ] [ ] ( web.impl.WebStandardImpl) ERROR - null: Unhandled error in ETier invocation

java.lang.IllegalStateException: Cannot create a session after the response has been committed

at org.apache.catalina.connector.Request.doGetSession(Unknown Source)

at org.apache.catalina.connector.Request.getSession(Unknown Source)

at org.apache.catalina.connector.RequestFacade.getSession(Unknown Source)

at com.pega.pegarules.web.impl.WebStandardImpl.makeEtierRequest(

at com.pega.pegarules.web.impl.WebStandardImpl.doPost(

at sun.reflect.GeneratedMethodAccessor75.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(

at java.lang.reflect.Method.invoke(

at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethod(

at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethodPropagatingThrowable(

at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethodPropagatingThrowable(

at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethod(

at com.pega.pegarules.internal.web.servlet.WebStandardBoot.doPost(

at javax.servlet.http.HttpServlet.service(Unknown Source)

at javax.servlet.http.HttpServlet.service(Unknown Source)

Steps to Reproduce

Not Applicable

Root Cause

A third-party product issue: This is a tomcat defect for the version being used.


Make the following change to the operating environment:

Upgrading tomcat from tomcat7 to tomcat8 resolves the ETier errors.

Published July 17, 2017 - Updated October 8, 2020

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