Li Yuanjian created SPARK-23811:
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Summary: Same tasks' FetchFailed event comes before Success will
cause child stage never succeed
Key: SPARK-23811
URL: https://issues.apache.org/jira/browse/SPARK-23811
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 2.3.0, 2.2.0
Reporter: Li Yuanjian
This is a bug caused by abnormal scenario describe below:
# ShuffleMapTask 1.0 running, this task will fetch data from ExecutorA
# ExecutorA Lost, trigger `mapOutputTracker.removeOutputsOnExecutor(execId)` ,
shuffleStatus changed.
# Speculative ShuffleMapTask 1.1 start, got a FetchFailed immediately.
# ShuffleMapTask 1 is the last task of its stage, so this stage will never
succeed because of there's no missing task DagScheduler can get.
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