uncleGen edited a comment on issue #26343: [SPARK-29683][YARN] Job will fail due to executor failures all available nodes are blacklisted URL: https://github.com/apache/spark/pull/26343#issuecomment-612770299 @attilapiros Adding double check `numClusterNodes != 0` can not actually resolve the issue. Like I and @sjrand have pointed, when active RM switches after failover, it will take a while for NM to register to RM, then `numClusterNodes` will be less than some small value. If it equals to like 1, then it will trigger the `isAllNodeBlacklisted` check.
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