[jira] [Created] (HDFS-15622) Deleted blocks linger in the replications queue

["Ahmed Hussein (Jira)" <ji...@apache.org>]

Ahmed Hussein created HDFS-15622:
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             Summary: Deleted blocks linger in the replications queue
                 Key: HDFS-15622
                 URL: https://issues.apache.org/jira/browse/HDFS-15622
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: hdfs
            Reporter: Ahmed Hussein
            Assignee: Ahmed Hussein


We had incident whereas after resolving a missing blocks incident by restarting two dead nodes, there were still 8 missing, but the list was empty. Metasave shows the 8 blocks are "orphaned" meaning the files were already deleted. It is unclear why they were left in the replication queue.

* The containing node was flaky and started stoped multiple time.
* The block allocation didn't work well due to the cluster-level storage space exhaustion.
* The NN was in safe mode.

Triggering a full block report from the node didn't have any effect. It will clear up if a failover happens as the repl queue will be reinitialized.



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