[
https://issues.apache.org/jira/browse/HBASE-20761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16518577#comment-16518577
]
Jake Miller commented on HBASE-20761:
-------------------------------------
SCR was enabled.
> FSReaderImpl#readBlockDataInternal can fail to switch to HDFS checksums in
> some edge cases
> ------------------------------------------------------------------------------------------
>
> Key: HBASE-20761
> URL: https://issues.apache.org/jira/browse/HBASE-20761
> Project: HBase
> Issue Type: Bug
> Components: HFile
> Reporter: Esteban Gutierrez
> Assignee: Esteban Gutierrez
> Priority: Major
>
> One of our users reported this problem on HBase 1.2 before and after
> HBASE-11625:
> {code}
> Caused by: java.io.IOException: On-disk size without header provided is
> 131131, but block header contains 0. Block offset: 2073954793, data starts
> with: \x00\x00\x00\x00\x00\x00\x00\x0\
> 0\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock.validateOnDiskSizeWithoutHeader(HFileBlock.java:526)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock.access$700(HFileBlock.java:92)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock$FSReaderImpl.readBlockDataInternal(HFileBlock.java:1699)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock$FSReaderImpl.readBlockData(HFileBlock.java:1542)
> at
> org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:445)
> at
> org.apache.hadoop.hbase.util.CompoundBloomFilter.contains(CompoundBloomFilter.java:100)
> {code}
> The problems occurs when we do a read a block without HDFS checksums enabled
> and due some data corruption we end with an empty headerBuf while trying to
> read the block before the HDFS checksum failover code. This will cause
> further attempts to read the block to fail since we will still retry the
> corrupt replica instead of reporting the corrupt replica and trying a
> different one.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
