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Support Article

PushException occuring on all environments

SA-59415

Summary



After disabling PRPushServlet using the prconfig.xml Dynamic System Setting (DSS), multiple PushExceptions are generated in the log for the application server.
The error occur on every interaction performed on the Pega portal. The error displays for the PushException even when the users log out.


Error Messages



com.pega.pegarules.session.external.serverpush.PushException :Push Engine is not yet started or starting has failed.

[14.linux.your_bank.nl] [STANDARD] [ ] [ ] (ervlet.WebAppLifeCycleListener) INFO - Push is disabled!
[14.linux.your_bank.nl] [STANDARD] [ ] [ ] (ervlet.WebAppLifeCycleListener) INFO - MBean registered via WebAppLifeCycle: 9cf973a99efb8b83810b410068730498
[14.linux.your_bank.nl] [STANDARD] [ ] [ ] (riv.management.MBeanManagement) INFO - MBean Management (Web) initialized for WebSphere
[14.linux.your_bank.nl] [STANDARD] [ ] [ ] (ervlet.WebAppLifeCycleListener) INFO - Push Engine will not be initialized, because push enabled: false and servlet registration



Steps to Reproduce

  1. Monitor the application using client tools to track the PRPushServlet invocations.
  2. Set the following DSS to disable the Push feature:

    Owning Ruleset: Pega-Engine
    Purpose: prconfig/server-push/enabled/default
    Value: false


Root Cause



A defect in Pegasystems’ code or rules.
Incorrect message type displayed in the logs.
In Pega 7.2.2, a hotfix was provided. This was because, in the earlier release the messages were ERROR instead of INFO or WARN.
The reason for the notification in DynaTrace was because the Push feature was disabled in the environment and the Presence was enabled.
When there is a change in the Presence record, it is published to subscribers using the Push framework. Since the Push feature was disabled, PushException displayed.
The logging level was changed to WARN when PushException occurred in an attempt to obtain a PushService instance. The type 'Error' would be logged if the Publish failed.



Resolution



Here's the explanation for the reported behavior:

The log message indicates that the login and logoff events are not published to the browser. This is expected because the the browser Push event is disabled. However, a warning or an information message must display instead of error messages in the logs.  

As a local-change, update to Pega 7.3.1.
Suggest Edit

Published May 7, 2019 - Updated October 8, 2020

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