[GIRAPH-1187] NPE in worker GC listener

• Type: Bug
• Status: Patch Available
• Priority: Critical
• Resolution: Unresolved
• Affects Version/s: 1.2.0, 1.3.0
• Fix Version/s: 1.2.0, 1.3.0
• Component/s: graph
• Labels: patch

Environment

Giraph 1.2.0 running in M/R on Hadoop 2.6

• Assignee: Unassigned
• Reporter: Randy Hu
• Created: 15/Apr/18 20:16
• Updated: 27/Aug/20 20:42

Description

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)