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From "Tsz Wo Nicholas Sze (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-9959) add log when block removed from last live datanode
Date Tue, 15 Mar 2016 00:38:33 GMT

    [ https://issues.apache.org/jira/browse/HDFS-9959?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15194472#comment-15194472
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Tsz Wo Nicholas Sze commented on HDFS-9959:
-------------------------------------------

Then there could be a lot of blocks in this case since a datanode may contains many blocks
fall in such case.  It is a problem since NN cannot do anything but printing the log message.
 We need to print it outside the lock.

> 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.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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