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  1. JBoss Enterprise Application Platform 4 and 5
  2. JBPAPP-6539

"/ by zero" in ExtendedElectionPolicySimple

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Details

    • Feature Request
    • Resolution: Done
    • Major
    • 4.3.0.GA_CP10
    • 4.3.0.GA_CP09
    • Clustering
    • None
    • Release Notes
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      A java.lang.ArithmeticException "divide by zero" (/ by zero) error occurred when a clustered singleton service using HASingletonController and an ExtendedElectionPolicySimple election policy was sent a shutdown signal. The / by zero error caused the HASingleton nodes to remain available, instead of shutting down after singleton services to the second node were migrated. Changes to ExtendedElectionPolicyBase#getCandidates have been made that return a null value when no candidates are present, instead of an empty list. The implemented fix now allows HA Singleton nodes to shut down promptly after failover.
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      A java.lang.ArithmeticException "divide by zero" (/ by zero) error occurred when a clustered singleton service using HASingletonController and an ExtendedElectionPolicySimple election policy was sent a shutdown signal. The / by zero error caused the HASingleton nodes to remain available, instead of shutting down after singleton services to the second node were migrated. Changes to ExtendedElectionPolicyBase#getCandidates have been made that return a null value when no candidates are present, instead of an empty list. The implemented fix now allows HA Singleton nodes to shut down promptly after failover.
    • Documented as Resolved Issue
    • ASSIGNED

    Description

      Error when shutting down JBoss with an HASingleton using a custom ExtendedElectionPolicySimple
      that is not deployed on all nodes.

      WARN [HASingletonController] Stopping failed test:service=TestElectionPolicyBug
      java.lang.ArithmeticException: / by zero
      at org.jboss.ha.singleton.ExtendedElectionPolicySimple.elect(ExtendedElectionPolicySimple.java:72)
      at org.jboss.ha.singleton.ExtendedElectionPolicyBase.pickSingleton(ExtendedElectionPolicyBase.java:66)
      at org.jboss.ha.singleton.ExtendedElectionPolicyBase.isElectedMaster(ExtendedElectionPolicyBase.java:72)

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          is blocked by

          Bug - A problem that impairs or prevents the functions of the product. JBAS-9389 "/ by zero" in ExtendedElectionPolicySimple

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
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              rhn-support-dereed Dennis Reed
              rhn-support-dereed Dennis Reed
              Jared Morgan Jared Morgan (Inactive)
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                Created:
                Updated:
                Resolved: