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

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

     [ https://issues.apache.org/jira/browse/HDFS-15622?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ahmed Hussein updated HDFS-15622:
---------------------------------
    Attachment: HDFS-15622.001.patch
        Status: Patch Available  (was: In Progress)

> 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
>            Priority: Major
>         Attachments: HDFS-15622.001.patch
>
>
> 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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