Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/2837#discussion_r88879086
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/executiongraph/ExecutionVertex.java
---
@@ -125,7 +142,7 @@ public ExecutionVertex(
this.inputEdges = new
ExecutionEdge[jobVertex.getJobVertex().getInputs().size()][];
- this.priorExecutions = new CopyOnWriteArrayList<Execution>();
+ this.priorExecutions = new
EvictingBoundedList<>(maxPriorExecutionHistoryLength);
--- End diff --
we should either have a proper default value here or modify the
SubtaskExecutionAttempt*Handler classes to be able to deal with cases where the
`ExecutionVertex#getPriorExecutionAttempt()` returns null.
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