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From André Oriani (JIRA) <j...@apache.org>
Subject [jira] [Commented] (HDFS-2090) BackupNode fails when log is streamed due checksum error
Date Tue, 21 Jun 2011 02:14:47 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13052321#comment-13052321
] 

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:


{panel:borderStyle=solid}
Commit 27b956fa62ce9b467ab7dd287dd6dcd5ab6a0cb3
Author: Hairong Kuang<hairong@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
{panel}

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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