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https://issues.apache.org/jira/browse/HDFS-14946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16963733#comment-16963733
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Fei Hui commented on HDFS-14946:
--------------------------------
UT depends on part code of HDFS-14920
Upload the patch later
> Erasure Coding: Block recovery failed during decommissioning
> ------------------------------------------------------------
>
> Key: HDFS-14946
> URL: https://issues.apache.org/jira/browse/HDFS-14946
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 3.0.3, 3.2.1, 3.1.3
> Reporter: Fei Hui
> Assignee: Fei Hui
> Priority: Major
>
> DataNode logs as follow
> {quote}
> org.apache.hadoop.HadoopIllegalArgumentException: No enough valid inputs are
> provided, not recoverable
> at
> org.apache.hadoop.io.erasurecode.rawcoder.ByteBufferDecodingState.checkInputBuffers(ByteBufferDecodingState.java:119)
> at
> org.apache.hadoop.io.erasurecode.rawcoder.ByteBufferDecodingState.<init>(ByteBufferDecodingState.java:47)
> at
> org.apache.hadoop.io.erasurecode.rawcoder.RawErasureDecoder.decode(RawErasureDecoder.java:86)
> at
> org.apache.hadoop.hdfs.server.datanode.erasurecode.StripedBlockReconstructor.reconstructTargets(StripedBlockReconstructor.java:126)
> at
> org.apache.hadoop.hdfs.server.datanode.erasurecode.StripedBlockReconstructor.reconstruct(StripedBlockReconstructor.java:97)
> at
> org.apache.hadoop.hdfs.server.datanode.erasurecode.StripedBlockReconstructor.run(StripedBlockReconstructor.java:60)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:748)
> {quote}
> Block recovery always failed because of srcNodes in the wrong order
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