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Hazelcast instance not active error occurs and Mashup fails



When implementing Pega Web Mashup using a standard user ID (such as, mashupuser), Hazelcast instance not active error occurs and the Mashup fails.

Error Messages

Error 1:

The message exceeds recommended size of 8000 (Size: 2846021). Topic: YOUR-DATA-ADMIN-OPERATOR-ID. Start of message: Class:Data-Admin-Operator-ID, Type:null, Context:{"StandardAttributes":{"OperatorID":"mashupuser","N...

Error 2:

com.pega.pegarules.priv.presence.PresenceRuntimeException: replace(): Presence Record update operation failed. Exceeded maximum attempts.Arguments:Operator:mashupuser,Tenant:shared,CustomCategory:null
at com.pega.pegarules.cluster.internal.presence.PresenceDataGridHazelcast.handleIfMaxAttemptsExceeded(
at com.pega.pegarules.cluster.internal.presence.PresenceDataGridHazelcast.replace(
at com.pega.pegarules.session.internal.presence.PresenceDataProcessorImpl.updateSession(
at com.pega.pegarules.session.internal.presence.PresenceLifeCycleEventManager.updateSession(
at com.pega.pegarules.session.internal.presence.PresenceStandardLifeCycleListener.onEvent(
at com.pega.bushe.event.ThreadSafeEventService.publish(

Error 3:

com.pega.bushe.event.ThreadSafeEventService handleException
WARNING: Exception thrown by;EventService subscriber:com.pega.pegarules.session.internal.presence.PresenceStandardLifeCycleListener@5f6e04d.  Subscriber class:class com.pega.pegarules.session.internal.presence.PresenceStandardLifeCycleListener
com.pega.bushe.exception.SwingException: com.pega.pegarules.session.external.requestor.RequestorLifeCycleEvent, event=com.pega.pegarules.session.external.requestor.RequestorLifeCycleEvent@8da23d1c, topic=null, eventObj=null
Caused by: java.lang.OutOfMemoryError: Java heap space
    at com.hazelcast.internal.serialization.impl.ByteArrayObjectDataOutput.ensureAvailable(
    at com.pega.pegarules.cluster.internal.presence.PresenceDataGridHazelcast.replace(

Steps to Reproduce

Implement Pega Web Mashup using a single user with operator Presence enabled.

Root Cause

A defect in Pegasystems’ code or rules.
The OutOfMemory error occurred because a single bulky operator Presence record failed to obtain a contiguous block of heap.


Perform the following local-change:
  1. Set a Dynamic System Settings (DSS) through the Pega Designer Studio,

    Pega-Engine (Owning Ruleset)

  2. Restart the cluster.

Published January 14, 2020 - Updated December 2, 2021

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