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https://issues.apache.org/jira/browse/HDFS-16626?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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caozhiqiang updated HDFS-16626:
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Attachment: image-2022-06-08-18-30-13-757.png
> Under replicated blocks in dfsadmin report should contain
> pendingReconstruction‘s blocks
> ----------------------------------------------------------------------------------------
>
> Key: HDFS-16626
> URL: https://issues.apache.org/jira/browse/HDFS-16626
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: ec, namanode
> Affects Versions: 3.4.0
> Reporter: caozhiqiang
> Assignee: caozhiqiang
> Priority: Major
> Labels: pull-request-available
> Attachments: image-2022-06-08-18-30-13-757.png
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In the output of command 'hdfs dfsadmin -report', the value of Under
> replicated blocks and ec Low redundancy block groups only contains the block
> number in BlockManager::neededReconstruction. It should also contain the
> block number in BlockManager::pendingReconstruction, include the timeout
> items. Specially, in some scenario, for example, decommission a dn with a lot
> of ec blocks, there would be a lot blocks in pendingReconstruction at a long
> time but neededReconstruction's size may be 0. That will confuse user and
> they can't access the real decommissioning progress.
> {code:java}
> Configured Capacity: 1036741707829248 (942.91 TB)
> Present Capacity: 983872491622400 (894.83 TB)
> DFS Remaining: 974247450424426 (886.07 TB)
> DFS Used: 9625041197974 (8.75 TB)
> DFS Used%: 0.98%
> Replicated Blocks:
> Under replicated blocks: 0
> Blocks with corrupt replicas: 0
> Missing blocks: 0
> Missing blocks (with replication factor 1): 0
> Low redundancy blocks with highest priority to recover: 0
> Pending deletion blocks: 0
> Erasure Coded Block Groups:
> Low redundancy block groups: 3481
> Block groups with corrupt internal blocks: 0
> Missing block groups: 0
> Low redundancy blocks with highest priority to recover: 0
> Pending deletion blocks: 245 {code}
> The below graph show the metrics monitor of under_replicated_blocks and
> pending_replicated_blocks in decommissioning a datanode process. The value of
> pending_replicated_blocks would not be included in dfsadmin report.
> !image-2022-06-08-11-38-29-664.png|width=1319,height=248!
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