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) -- This message was sent by Atlassian JIRA (v7.6.3#76005)