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NullPointerException while activating the passivated page data



NullPointerException in logs while activating the passivated page data. This occurs after switching to database passivation.
Duplicate sessions are created as the user is unable to restore the session after timeout.

Error Messages

[ WebContainer : 0] [ STANDARD] [ ] [ ] ( mgmt.base.NodeRequestorMgt) ERROR vn| - Unable to create Requestor with name "H0FAE2AA6DD83ADA05FC2007B303C2AE7", substituted "HE0A0BBB47FC9AA0A57FEF5C11AAD35FF"
[ WebContainer : 0] [ STANDARD] [ ] [ ] ( mgmt.base.DatabaseStorage) ERROR .vn| - Error while restoring page from database (HE0A0BBB47FC9AA0A57FEF5C11AAD35FF/TABTHREAD0 pxThread): Instance not found
[ WebContainer : 0] [ STANDARD] [ ] [ ] (ngineinterface.service.HttpAPI) ERROR | - java.lang.NullPointerException
at com.pega.pegarules.session.internal.mgmt.base.DatabaseStorage.activatePage(
at com.pega.pegarules.session.internal.mgmt.base.NodeRequestorMgt.readPage(
at com.pega.pegarules.session.internal.mgmt.base.ThreadPassivation$ThreadPageActivator.activate(
at com.pega.pegarules.session.internal.mgmt.base.handler.AbstractPageHandler.activate(
at com.pega.pegarules.session.internal.mgmt.base.ThreadPassivation.activateThread(
at com.pega.pegarules.session.internal.mgmt.base.ThreadPassivation.configureThreadImpl(
at com.pega.pegarules.session.internal.mgmt.PRThreadBase.configureThread(
at com.pega.pegarules.session.internal.mgmt.PRThreadImpl.<init>(
at com.pega.pegarules.session.internal.mgmt.PRThreadImpl.acquire(
at com.pega.pegarules.session.internal.mgmt.base.RequestorPassivation.activateRequestor(
at com.pega.pegarules.session.internal.mgmt.PRRequestorImpl.activateRequestor(
at com.pega.pegarules.session.internal.mgmt.base.NodeRequestorMgt.activateRequestor(
at com.pega.pegarules.session.internal.mgmt.base.NodeRequestorMgt.activateRequestorFromPassivatePage(
at sun.reflect.GeneratedMethodAccessor72.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(

Steps to Reproduce


Root Cause

For a null instance, NullPointerException handling was missing in the DatabaseStorage class.


Apply HFix-45906.


Published July 27, 2018 - Updated October 8, 2020

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