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https://issues.apache.org/jira/browse/HDFS-2090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13052321#comment-13052321
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André Oriani commented on HDFS-2090:
------------------------------------
According to my investigation and the help of Ivan Kelly from Yahoo, the commit
below has introduced the bug:
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Commit 27b956fa62ce9b467ab7dd287dd6dcd5ab6a0cb3
Author: Hairong Kuang<hair...@apache.org>
Date: Mon Apr 11 17:15:27 2011 +0000
HDFS-1630. Support fsedits checksum. Contrbuted by Hairong Kuang.
git-svn-id:
https://svn.apache.org/repos/asf/hadoop/hdfs/trunk@109113113f79535-47bb-0310-9956-ffa450edef68
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PS: This is a github commit.
> BackupNode fails when log is streamed due checksum error
> ---------------------------------------------------------
>
> Key: HDFS-2090
> URL: https://issues.apache.org/jira/browse/HDFS-2090
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.23.0
> Reporter: André Oriani
>
> *Reproductions steps:*
> 1) An HDFS cluster is up and running
> 2) A backupnode is up, running, and registered to the namenode
> 3) Do a write operation like copying a file to the FS.
> *Expected Result:* No exception is thrown
> *Actual Result:* A exception is thrown due a checksum error in the streamed
> log:
> {panel:title=log| borderStyle=solid}
> 11/06/15 17:52:22 INFO ipc.Server: IPC Server handler 1 on 50100, call
> journal(NamenodeRegistration(localhost:8020, role=NameNode), 101, 164,
> [B@3951f910), rpc version=1, client version=5, methodsFingerPrint=302283637
> from 192.168.1.102:56780: error: java.io.IOException: Error replaying edit
> log at offset 13
> Recent opcode offsets: 1
> java.io.IOException: Error replaying edit log at offset 13
> Recent opcode offsets: 1
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadEditRecords(FSEditLogLoader.java:514)
> at
> org.apache.hadoop.hdfs.server.namenode.BackupImage.journal(BackupImage.java:242)
> at
> org.apache.hadoop.hdfs.server.namenode.BackupNode.journal(BackupNode.java:251)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.apache.hadoop.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:422)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1496)
> at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1492)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:396)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1131)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1490)
> Caused by: org.apache.hadoop.fs.ChecksumException: Transaction 1 is corrupt.
> Calculated checksum is -2116249809 but read checksum 0
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.validateChecksum(FSEditLogLoader.java:546)
> at
> org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader.loadEditRecords(FSEditLogLoader.java:490)
> ... 13 more
> {panel}
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