Github user kanzhang commented on the pull request:
https://github.com/apache/spark/pull/306#issuecomment-39398593
When the driver sends StopExecutor to executor (log msg "Driver commanded a
shutdown"), it also ends up here. So it can be a normal exit depends on the
exit code. See my comment here
https://issues.apache.org/jira/browse/SPARK-1118?focusedCommentId=13958329&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13958329
There are 2 other places where FAILED is used. One is when exception is
caught in this same method. The other is when exception is caught in
LaunchExecutor() in Worker.scala.
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