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From "Lei (Eddy) Xu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-12349) Improve log message when it could not alloc enough blocks for EC
Date Thu, 24 Aug 2017 23:43:00 GMT

     [ https://issues.apache.org/jira/browse/HDFS-12349?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Lei (Eddy) Xu updated HDFS-12349:
---------------------------------
    Attachment: HDFS-12349.00.patch

Attach the patch to fix cases for both no enough data block and no enough parity block cases.
It also move the logic of checking data blocks to {{BlockManager}}, similar to what NN checks
{{minReplication}}. 

> Improve log message when it could not alloc enough blocks for EC 
> -----------------------------------------------------------------
>
>                 Key: HDFS-12349
>                 URL: https://issues.apache.org/jira/browse/HDFS-12349
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: erasure-coding
>    Affects Versions: 3.0.0-alpha3
>            Reporter: Lei (Eddy) Xu
>            Assignee: Lei (Eddy) Xu
>            Priority: Minor
>         Attachments: HDFS-12349.00.patch
>
>
> When an EC output stream could not alloc enough blocks for parity blocks, it sets the
warning.
> {code}
> if (blocks[i] == null) {
>         LOG.warn("Failed to get block location for parity block, index=" + i);
> {code}
> We should clarify the cause of this warning message.



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