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Posted to dev@giraph.apache.org by "Randy Hu (JIRA)" <ji...@apache.org> on 2018/04/15 20:17:00 UTC

[jira] [Created] (GIRAPH-1187) NPE in worker GC listener

Randy Hu created GIRAPH-1187:
--------------------------------

             Summary: NPE in worker GC listener 
                 Key: GIRAPH-1187
                 URL: https://issues.apache.org/jira/browse/GIRAPH-1187
             Project: Giraph
          Issue Type: Bug
          Components: graph
    Affects Versions: 1.2.0
         Environment: Giraph 1.2.0 running in M/R on Hadoop 2.6
            Reporter: Randy Hu


Likely the GC notification happened before any super step, in which case "

gcTimeMetric" is not initialized at all. Here is stack trace:

 

java.lang.NullPointerException at org.apache.giraph.graph.GraphTaskManager$1.handleNotification(GraphTaskManager.java:667) at sun.management.NotificationEmitterSupport.sendNotification(NotificationEmitterSupport.java:156) at sun.management.GarbageCollectorImpl.createGCNotification(GarbageCollectorImpl.java:143)



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