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From "Xinwei Qin (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-8732) Erasure Coding: Fail to read a file with corrupted blocks
Date Wed, 08 Jul 2015 07:59:04 GMT
Xinwei Qin  created HDFS-8732:
---------------------------------

             Summary: 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 


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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