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https://issues.apache.org/jira/browse/HDFS-14450?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wu Weiwei updated HDFS-14450:
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Attachment: HDFS-14450-000.patch
> Erasure Coding: decommissioning datanodes cause replicate a large number of
> duplicate EC internal blocks
> --------------------------------------------------------------------------------------------------------
>
> Key: HDFS-14450
> URL: https://issues.apache.org/jira/browse/HDFS-14450
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Reporter: Wu Weiwei
> Assignee: Wu Weiwei
> Priority: Major
> Attachments: HDFS-14450-000.patch
>
>
> {code:java}
> // [WARN] [RedundancyMonitor] : Failed to place enough replicas, still in
> need of 2 to reach 167 (unavailableStorages=[DISK, ARCHIVE],
> storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK],
> creationFallbacks=[], replicationFallbacks=[ARCHIVE]}, newBlock=false) All
> required storage types are unavailable: unavailableStorages=[DISK, ARCHIVE],
> storagePolicy=BlockStoragePolicy{HOT:7, storageTypes=[DISK],
> creationFallbacks=[], replicationFallbacks=[ARCHIVE]}
> {code}
> In a large-scale cluster, decommissioning large-scale datanodes cause EC
> block groups to replicate a large number of duplicate internal blocks.
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