[FLINK-5276] ExecutionVertex archiving can throw NPE with many previous attempts

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.1.4
• Component/s: Runtime / Coordination
• Assignee: Ufuk Celebi
• Reporter: Ufuk Celebi
• Created: 07/Dec/16 13:01
• Updated: 28/Feb/19 14:01
• Resolved: 07/Dec/16 16:06

Description

I saw a NPE while archiving a ExecutionVertex:

execution graph org.apache.flink.runtime.executiongraph.ExecutionGraph@c4e0722 for archiving.
java.lang.NullPointerException: null
	at org.apache.flink.runtime.executiongraph.ExecutionVertex.prepareForArchiving(ExecutionVertex.java:583)
	at org.apache.flink.runtime.executiongraph.ExecutionJobVertex.prepareForArchiving(ExecutionJobVertex.java:439)
	at org.apache.flink.runtime.executiongraph.ExecutionGraph.prepareForArchiving(ExecutionGraph.java:1042)
...

I think this is due to the newly introduced EvictingBoundedList which returns a default element (null)) for evicted elements when iterating over it.

This affects the backport to release-1.1 only.

Issue Links

• links to: GitHub Pull Request #2957