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From "Xinwei Qin (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-8732) Erasure Coding: Fail to read a file with corrupted blocks
Date Fri, 10 Jul 2015 01:54:05 GMT

     [ https://issues.apache.org/jira/browse/HDFS-8732?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Xinwei Qin  resolved HDFS-8732.
-------------------------------
    Resolution: Fixed

> Erasure Coding: Fail to read a file with corrupted blocks
> ---------------------------------------------------------
>
>                 Key: HDFS-8732
>                 URL: https://issues.apache.org/jira/browse/HDFS-8732
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Xinwei Qin 
>            Assignee: Walter Su
>         Attachments: testReadCorruptedData.patch
>
>
> In system test of reading EC file(HDFS-8259), the methods {{testReadCorruptedData*()}}
failed to read a EC file with corrupted blocks(overwrite some data to several blocks and this
will make client get a  checksum exception). 
> Exception logs:
> {code}
> java.lang.NullPointerException
> at org.apache.hadoop.hdfs.DFSStripedInputStream$StatefulStripeReader.readChunk(DFSStripedInputStream.java:771)
> at org.apache.hadoop.hdfs.DFSStripedInputStream$StripeReader.readStripe(DFSStripedInputStream.java:623)
> at org.apache.hadoop.hdfs.DFSStripedInputStream.readOneStripe(DFSStripedInputStream.java:335)
> at org.apache.hadoop.hdfs.DFSStripedInputStream.readWithStrategy(DFSStripedInputStream.java:465)
> at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:946)
> at java.io.DataInputStream.read(DataInputStream.java:149)
> at org.apache.hadoop.hdfs.StripedFileTestUtil.verifyStatefulRead(StripedFileTestUtil.java:98)
> at org.apache.hadoop.hdfs.TestReadStripedFileWithDecoding.verifyRead(TestReadStripedFileWithDecoding.java:196)
> at org.apache.hadoop.hdfs.TestReadStripedFileWithDecoding.testOneFileWithBlockCorrupted(TestReadStripedFileWithDecoding.java:246)
> at org.apache.hadoop.hdfs.TestReadStripedFileWithDecoding.testReadCorruptedData11(TestReadStripedFileWithDecoding.java:114)
> {code}



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