[TEZ-3413] ConcurrentModificationException in HistoryEventTimelineConversion for AppLaunchedEvent

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Fix Version/s: 0.7.2, 0.9.0, 0.8.5
• Target Version/s: 0.7.2
• Hadoop Flags: Reviewed
• Assignee: Jonathan Turner Eagles
• Reporter: Jonathan Turner Eagles
• Created: 15/Aug/16 23:04
• Updated: 14/Mar/17 03:50
• Resolved: 17/Aug/16 15:48

Description

AppLaunchedEvent contains the amConfig from the DAGAppMaster that is used to initialized several services. If Configuration#iterator is called while someone calls Configuration#set, HistoryEventTimelineConversion#convertAppLaunchedEvent will throw a CME.

java.util.ConcurrentModificationException
	at java.util.Hashtable$Enumerator.next(Hashtable.java:1367)
	at org.apache.hadoop.conf.Configuration.iterator(Configuration.java:2451)
	at org.apache.tez.dag.history.utils.DAGUtils.convertConfigurationToATSMap(DAGUtils.java:449)
	at org.apache.tez.dag.history.logging.ats.HistoryEventTimelineConversion.convertAppLaunchedEvent(HistoryEventTimelineConversion.java:177)
	at org.apache.tez.dag.history.logging.ats.HistoryEventTimelineConversion.convertToTimelineEntity(HistoryEventTimelineConversion.java:69)

Issue Links

• is related to: HADOOP-13500 Synchronizing iteration of Configuration properties object