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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-9818) Correctly handle EC reconstruction work caused by not enough racks
Date Sat, 20 Feb 2016 03:04:18 GMT

     [ https://issues.apache.org/jira/browse/HDFS-9818?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jing Zhao updated HDFS-9818:
----------------------------
       Resolution: Fixed
    Fix Version/s: 3.0.0
           Status: Resolved  (was: Patch Available)

The failed tests all passed in my local machine. I've committed the patch to trunk. Thanks
all for the review!

> Correctly handle EC reconstruction work caused by not enough racks
> ------------------------------------------------------------------
>
>                 Key: HDFS-9818
>                 URL: https://issues.apache.org/jira/browse/HDFS-9818
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, namenode
>    Affects Versions: 3.0.0
>            Reporter: Takuya Fukudome
>            Assignee: Jing Zhao
>             Fix For: 3.0.0
>
>         Attachments: HDFS-9818.000.patch, HDFS-9818.001.patch, HDFS-9818.002.patch, HDFS-9818.003.patch,
HDFS-9818.004.patch
>
>
> This is reported by [~tfukudom]:
> In a system test where 1 of 7 datanode racks were stopped, {{HadoopIllegalArgumentException}}
was seen on DataNode side while reconstructing missing EC blocks:
> {code}
> 2016-02-16 11:09:06,672 WARN  datanode.DataNode (ErasureCodingWorker.java:run(482)) -
Failed to recover striped block: BP-480558282-172.29.4.13-1453805190696:blk_-9223372036850962784_278270
> org.apache.hadoop.HadoopIllegalArgumentException: Inputs not fully corresponding to erasedIndexes
in null places. erasedOrNotToReadIndexes: [1, 2, 6], erasedIndexes: [3]
> 	at org.apache.hadoop.io.erasurecode.rawcoder.RSRawDecoder.doDecode(RSRawDecoder.java:166)
> 	at org.apache.hadoop.io.erasurecode.rawcoder.AbstractRawErasureDecoder.decode(AbstractRawErasureDecoder.java:84)
> 	at org.apache.hadoop.io.erasurecode.rawcoder.RSRawDecoder.decode(RSRawDecoder.java:89)
> 	at org.apache.hadoop.hdfs.server.datanode.erasurecode.ErasureCodingWorker$ReconstructAndTransferBlock.recoverTargets(ErasureCodingWorker.java:683)
> 	at org.apache.hadoop.hdfs.server.datanode.erasurecode.ErasureCodingWorker$ReconstructAndTransferBlock.run(ErasureCodingWorker.java:465)
> {code}



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