pxExecuteAnActivity is sometimes throwing null pointer exception

KOMARINA · January 19, 2021, 4:36pm

Hi,

Greetings. I am using RUF pxExecuteAnActivity(EventPage,“ActivityName”) where EventPage is a parameter of type Page, but sometimes i get the below error

LegacyModelAspectInvokableRuleContainer.invoke-Exception Encountered a :java.lang.NullPointerException]

I have verified that the EventPage Parameter has a value when the above exception happened.

Any ideas on what’s causing this?

Regards,

Bharat

BraamSmithCLSA · January 19, 2021, 10:18pm

@KOMARINA

Is there a stack trace in the logs that highlights what call stack is when the Null Pointer Exception occurs? For example, whilst the parameter may have a value, if that value doesn’t refer to an existing page on the clipboard, then that could be one reason. However the stack trace will be more informative. It will highlight at least whether it started to run the activity or whether the problem occurs before then.

Also, the Tracer can help narrow down in between which steps the issue is occurring.

KOMARINA · January 19, 2021, 10:40pm

@BraamCLSA - Hi Bram, Thank you. I could not get a tracer output as this happens at random times however i have the stack trace from logs, i have also been printing the pagename in logs before this RUF is being called.

Attached document has screen shots of the DT

Exception in Logs

2021-01-19 16:01:07,445 [tp-apr-8080-exec-223] [ STANDARD] [ LloydsDA:01.01.01] (elAspectInvokableRuleContainer) ERROR lloyds-chorus-dt4.pegacloud.net|ip-161-32-39-120.eu-west-2.compute.internal [email protected] - Exception encountered while executing a data transform

java.lang.NullPointerException: null

at com.pegarules.generated.pxExecuteAnActivity_080101_5969683509118130077.pxExecuteAnActivity08_01_01(pxExecuteAnActivity_080101_5969683509118130077.java:115) ~[?:?]

at com.pegarules.generated.pxExecuteAnActivity_080101_5969683509118130077.invoke(pxExecuteAnActivity_080101_5969683509118130077.java:78) ~[?:?]

at com.pega.pegarules.generation.internal.library.LibraryRuntime.resolveAndinvokeFunctionViaReflection(LibraryRuntime.java:232) ~[prprivate-generation.jar:?]

at com.pega.pegarules.generation.internal.library.LibraryRuntime.invokeLibraryRuntime(LibraryRuntime.java:123) ~[prprivate-generation.jar:?]

at com.pega.pegarules.generation.internal.library.LibraryFunctionUtilityImpl.resolveMethodCall(LibraryFunctionUtilityImpl.java:2932) ~[prprivate-generation.jar:?]

at com.pega.pegarules.session.internal.mgmt.Executable.resolveMethodCall(Executable.java:11936) ~[prprivate-session.jar:?]

at com.pegarules.generated.model.ra_model_setmprproperties_b7a3ccafa3560092c1cbdbb49ed9dd31.forEach_1(ra_model_setmprproperties_b7a3ccafa3560092c1cbdbb49ed9dd31.java:576) ~[?:?]

at com.pegarules.generated.model.ra_model_setmprproperties_b7a3ccafa3560092c1cbdbb49ed9dd31.perform(ra_model_setmprproperties_b7a3ccafa3560092c1cbdbb49ed9dd31.java:132) ~[?:?]

at com.pega.platform.executionengine.vtable.containers.internal.LegacyModelAspectInvokableRuleContainer.invoke(LegacyModelAspectInvokableRuleContainer.java:67) ~[execution-engine.jar:?]

at com.pega.platform.executionengine.vtable.internal.RuleDispatcherImpl.invokeModel(RuleDispatcherImpl.java:165) ~[execution-engine.jar:?]

at com.pega.pegarules.session.internal.mgmt.Executable.doDataTransform(Executable.java:4569) ~[prprivate-session.jar:?]

at com.pega.pegarules.session.internal.mgmt.Executable.applyModel(Executable.java:4556) ~[prprivate-session.jar:?]

at com.pegarules.generated.activity.ra_action_loadmprdata_499cc8db34d67334416d5549a0de09eb.step8_circum0(ra_action_loadmprdata_499cc8db34d67334416d5549a0de09eb.java:685) ~[?:?]

at com.pegarules.generated.activity.ra_action_loadmprdata_499cc8db34d67334416d5549a0de09eb.perform(ra_action_loadmprdata_499cc8db34d67334416d5549a0de09eb.java:220) ~[?:?]

at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:2814) ~[prprivate-session.jar:?]

at com.pega.pegarules.session.internal.mgmt.Executable.invokeActivity(Executable.java:11377) ~[prprivate-session.jar:?]

at com.pegarules.generated.activity.sh_action_loaddca_65ea78f3c6f96a073d30ba30ffb1be8e.step3_1_circum0(sh_action_loaddca_65ea78f3c6f96a073d30ba30ffb1be8e.java:527) ~[?:?]

at com.pegarules.generated.activity.sh_action_loaddca_65ea78f3c6f96a073d30ba30ffb1be8e.step3_0_circum0(sh_action_loaddca_65ea78f3c6f96a073d30ba30ffb1be8e.java:485) ~[?:?]

at com.pegarules.generated.activity.sh_action_loaddca_65ea78f3c6f96a073d30ba30ffb1be8e.perform(sh_action_loaddca_65ea78f3c6f96a073d30ba30ffb1be8e.java:118) ~[?:?]

at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:2814) ~[prprivate-session.jar:?]

at com.pega.pegarules.session.internal.mgmt.Executable.doAction(Executable.java:2202) ~[prprivate-session.jar:?]

at com.pega.pegarules.session.internal.mgmt.Executable.doAction(Executable.java:2185) ~[prprivate-session.jar:?]

at com.pegarules.generated.activity.ra_action_pyrunrecordexecute_025cb29e81d295d991d37ad8d1e40455.step2_circum0(ra_action_pyrunrecordexecute_025cb29e81d295d991d37ad8d1e40455.java:280) ~[?:?]

at com.pegarules.generated.activity.ra_action_pyrunrecordexecute_025cb29e81d295d991d37ad8d1e40455.perform(ra_action_pyrunrecordexecute_025cb29e81d295d991d37ad8d1e40455.java:94) ~[?:?]

at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:2814) ~[prprivate-session.jar:?]

at com.pega.pegarules.session.internal.mgmt.Executable.invokeActivity(Executable.java:11377) ~[prprivate-session.jar:?]

at com.pegarules.generated.activity.ra_action_pzrunrecordexecute_46ae077cc50244070fb53e2948cb85e1.step11_circum0(ra_action_pzrunrecordexecute_46ae077cc50244070fb53e2948cb85e1.java:1040) ~[?:?]

at com.pegarules.generated.activity.ra_action_pzrunrecordexecute_46ae077cc50244070fb53e2948cb85e1.perform(ra_action_pzrunrecordexecute_46ae077cc50244070fb53e2948cb85e1.java:252) ~[?:?]

at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:2814) ~[prprivate-session.jar:?]

at com.pega.pegarules.session.internal.mgmt.base.ThreadRunner.runActivitiesAlt(ThreadRunner.java:653) ~[prprivate-session.jar:?]

at com.pega.pegarules.session.internal.mgmt.PRThreadImpl.runActivitiesAlt(PRThreadImpl.java:520) ~[prprivate-session.jar:?]

at com.pega.pegarules.session.internal.engineinterface.service.HttpAPI.runActivities(HttpAPI.java:4109) ~[prprivate-session.jar:?]

at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequestInner(EngineAPI.java:445) ~[prenginext.jar:?]

at sun.reflect.GeneratedMethodAccessor135.invoke(Unknown Source) ~[?:?]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_171]

at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_171]

at com.pega.pegarules.session.internal.PRSessionProviderImpl.performTargetActionWithLock(PRSessionProviderImpl.java:1408) ~[prprivate-session.jar:?]

at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:1140) ~[prprivate-session.jar:?]

at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:994) ~[prprivate-session.jar:?]

at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequest(EngineAPI.java:368) ~[prenginext.jar:?]

at com.pega.pegarules.session.internal.engineinterface.service.HttpAPI.invoke(HttpAPI.java:920) ~[prprivate-session.jar:?]

at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl._invokeEngine_privact(EngineImpl.java:338) ~[prprivate-session.jar:?]

at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl.invokeEngine(EngineImpl.java:282) ~[prprivate-session.jar:?]

at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl.invokeEngine(EngineImpl.java:259) ~[prprivate-session.jar:?]

at com.pega.pegarules.priv.context.JNDIEnvironment.invokeEngineInner(JNDIEnvironment.java:281) ~[prpublic.jar:?]

at com.pega.pegarules.priv.context.JNDIEnvironment.invokeEngine(JNDIEnvironment.java:226) ~[prpublic.jar:?]

at com.pega.pegarules.web.impl.WebStandardImpl.makeEtierRequest(WebStandardImpl.java:767) ~[prwebj2ee.jar:?]

at com.pega.pegarules.web.impl.WebStandardImpl.doPost(WebStandardImpl.java:423) ~[prwebj2ee.jar:?]

at sun.reflect.GeneratedMethodAccessor122.invoke(Unknown Source) ~[?:?]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_171]

at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_171]

at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethod(PRBootstrap.java:385) ~[prbootstrap-8.4.2-561.jar:8.4.2-561]

at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethodPropagatingThrowable(PRBootstrap.java:427) ~[prbootstrap-8.4.2-561.jar:8.4.2-561]

at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethodPropagatingThrowable(AppServerBridgeToPega.java:225) ~[prbootstrap-api-8.4.2-561.jar:8.4.2-561]

at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethod(AppServerBridgeToPega.java:274) ~[prbootstrap-api-8.4.2-561.jar:8.4.2-561]

at com.pega.pegarules.internal.web.servlet.WebStandardBoot.doPost(WebStandardBoot.java:146) ~[prbootstrap-api-8.4.2-561.jar:8.4.2-561]

at com.pega.pegarules.internal.web.servlet.WebStandardBoot.doGet(WebStandardBoot.java:107) ~[prbootstrap-api-8.4.2-561.jar:8.4.2-561]

at javax.servlet.http.HttpServlet.service(HttpServlet.java:624) ~[servlet-api.jar:?]

at com.pega.pegarules.internal.web.servlet.WebStandardBoot.service(WebStandardBoot.java:172) ~[prbootstrap-api-8.4.2-561.jar:8.4.2-561]

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731) ~[servlet-api.jar:?]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) ~[catalina.jar:7.0.88]

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) ~[catalina.jar:7.0.88]

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat7-websocket.jar:7.0.88]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) ~[catalina.jar:7.0.88]

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) ~[catalina.jar:7.0.88]

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219) ~[catalina.jar:7.0.88]

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110) ~[catalina.jar:7.0.88]

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:498) ~[catalina.jar:7.0.88]

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169) ~[catalina.jar:7.0.88]

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) ~[catalina.jar:7.0.88]

at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:683) ~[catalina.jar:7.0.88]

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:1025) ~[catalina.jar:7.0.88]

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) ~[catalina.jar:7.0.88]

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445) ~[catalina.jar:7.0.88]

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1139) ~[tomcat-coyote.jar:7.0.88]

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637) ~[tomcat-coyote.jar:7.0.88]

at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2555) ~[tomcat-coyote.jar:7.0.88]

at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2544) ~[tomcat-coyote.jar:7.0.88]

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_171]

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_171]

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-coyote.jar:7.0.88]

at java.lang.Thread.run(Thread.java:748) [?:1.8.0_171]

2021-01-19 16:01:07,447 [tp-apr-8080-exec-223] [ STANDARD] [ LloydsDA:01.01.01] (dMPRData.Lloyds_DA_Data.Action) INFO lloyds-chorus-dt4.pegacloud.net|ip-161-32-39-120.eu-west-2.compute.internal [email protected] - Exception loading MPR Data into MPR Reference Tables*****

java.lang.Throwable: null

at com.pegarules.generated.activity.ra_action_loadmprdata_499cc8db34d67334416d5549a0de09eb.step10_circum0(ra_action_loadmprdata_499cc8db34d67334416d5549a0de09eb.java:749) ~[?:?]

at com.pegarules.generated.activity.ra_action_loadmprdata_499cc8db34d67334416d5549a0de09eb.perform(ra_action_loadmprdata_499cc8db34d67334416d5549a0de09eb.java:240) ~[?:?]