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Exception during startup processing when Introscope is present



Users see an error when trying to start WebSphere Application Server 8.5.5, Java 1.7 running Pega 7.3, and the engine does not initialize.

Error Messages

2017-10-30 20:05:25,014 [ server.startup : 0] [ ] [ ] [ ] (ervlet.WebAppLifeCycleListener) ERROR - Exception during startup processing nested exception is: java.lang.RuntimeException: Problem during method invocation (doStartup)
at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethodPropagatingException( ~[prbootstrap-api-7.3.0-77.jar:7.3.0-77]

Caused by: java.lang.ExceptionInInitializerError
at java.lang.J9VMInternals.ensureError( ~[?:1.7.0]
at java.lang.J9VMInternals.recordInitializationFailure( ~[?:1.7.0]
at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineStartup.initEngine( ~[prprivate.jar:?]

Caused by: java.lang.RuntimeException: Unable to initialize provider Execution
at com.pega.pegarules.common.PREngineProvider.<clinit>( ~[?:?]
at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineStartup.initEngine( ~[prprivate.jar:?]

Caused by: java.lang.VerifyError: JVMVRFY012 stack shape inconsistent; class=com/pega/pegarules/exec/internal/util/collections/StringPoolImpl, method=<init>()V, pc=22
at com.pega.pegarules.exec.internal.PRExecProviderImpl.getStringPool( ~[prprivate.jar:?]

Steps to Reproduce

Run Pega 7.3 on WebSphere Application Server 8.5.5 with Wily Introscope.

Root Cause

A defect or configuration issue in the operating environment

Stack shape error is due to Introscope tool running in this environment.


Perform one of the following local-changes:

Deactivate Introscope and restart the JVM.

If Introscope is your primary monitoring tool and disabling it is not feasible, then take this alternative approach:
  1. Stop the application server.
  2. Open the AGENT_HOME/core/config/IntroscopeAgent.profile and specify this setting:
    introscope.autoprobe.constructor.policy=Partial introscope.autoprobe.constructor.instrumentation.affected.vendors=Oracle,SAP,IBM
  3. Start the application server.

Published May 4, 2018 - Updated October 8, 2020

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