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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, 07 Sep 2017 21:14:00 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-12349.02.patch

Hi, [~andrew.wang]

Thanks for the review, addressed your comments accordingly. 

The following are a few message changes:

* {{"Failed to get block location for parity block, index=3"}}  to 
{{"Cannot allocate parity block(index=3, policy=RS-6-3-1024k), Not enough datanodes? Exclude
nodes=None)"}}

* {{"Failed to get following block, i=3"}}  to {{"Failed to allocate parity block, index=3"}}

* For a 3x replicated file: {{"File /foo could only be written to 1 of the 2 minReplication.
There are 5 datanode(s) running and  no node(s) are excluded in this operation."}}

* For an EC file: {{"File /bar could only be written to 5 of the 6 required nodes for RS-6-3-1024k.
There are 5 datanode(s) running and  no node(s) are excluded in this operation."}}



> 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, HDFS-12349.01.patch, HDFS-12349.02.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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