Support Article

WrongModeException after passivation



Wrong mode exceptions appear in the log file after passivation.

Error Messages

Caused by: WrongModemyClass.SICData Unknown ClipboardProperty.adoptVirtualPageList String

Steps to Reproduce

Remain idle so the system times out. Then log in again.

Root Cause

A defect in Pegasystems’ code or rules. It is related to page passivation; however, the root cause is unknown.

The stack trace will show this line,
which indicates that something in page passivation is causing the error.

at com.pega.pegarules.session.internal.mgmt.base.ThreadPageDir.checkForPassivatedPage(


Perform the following local-change:

Turn off page passivation by means of this prconfig entry:

<env name="initialization/persistrequestor/usepagelevelpassivation" value="false"/>

The performance impact is extremely minimal and probably will not even be noticed.

Published April 7, 2017 - Updated April 24, 2017

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