[GIRAPH-853] Fix concurrency issue in GiraphMetrics

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.1.0
• Assignee: Maja Kabiljo
• Reporter: Maja Kabiljo
• Created: 14/Feb/14 16:53
• Updated: 26/Jun/14 19:10
• Resolved: 27/Feb/14 20:27

Description

Tests sometimes fail due to concurrency issue in GiraphMetrics when adding observers

Caused by: java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:819)
at java.util.ArrayList$Itr.next(ArrayList.java:791)
at org.apache.giraph.metrics.GiraphMetrics.resetSuperstepMetrics(GiraphMetrics.java:134)
at org.apache.giraph.graph.GraphTaskManager.checkTaskState(GraphTaskManager.java:829) ...