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https://issues.apache.org/jira/browse/HDFS-9959?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15202111#comment-15202111
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Arpit Agarwal commented on HDFS-9959:
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Hi [~zhaoyunjiong], this will need some thought to get right. We don't want to
keep more state in the NN than necessary. Also access to missingBlocks needs to
be synchronized in some way. I am not sure this is worth the effort and risk,
tbh.
> add log when block removed from last live datanode
> --------------------------------------------------
>
> Key: HDFS-9959
> URL: https://issues.apache.org/jira/browse/HDFS-9959
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Reporter: yunjiong zhao
> Assignee: yunjiong zhao
> Priority: Minor
> Attachments: HDFS-9959.1.patch, HDFS-9959.patch
>
>
> Add logs like "BLOCK* No live nodes contain block blk_1073741825_1001, last
> datanode contain it is node: 127.0.0.1:65341" in BlockStateChange should help
> to identify which datanode should be fixed first to recover missing blocks.
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