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From "Lars Ailo Bongo (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-7199) Crash due to reuse of checksum files
Date Fri, 18 Mar 2011 18:08:29 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7199?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13008553#comment-13008553
] 

Lars Ailo Bongo commented on HADOOP-7199:
-----------------------------------------

Title and description have been updated.

> Crash due to reuse of checksum files
> ------------------------------------
>
>                 Key: HADOOP-7199
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7199
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 0.20.2
>         Environment: Cloudera CDH3B4 in pseudo mode on a Linux 2.6.32-28-generic #55-Ubuntu
SMP x86_64 kernel, with Java HotSpot64-Bit Server VM (build 19.1-b02, mixed mode)
>            Reporter: Lars Ailo Bongo
>            Priority: Minor
>
> copyFromLocalFile crashes if a cheksum file exists on the local filesystem and the checksum
does not match the file content. This will for example crash "hadoop -fs put ./foo ./foo"
with a non-descriptive error.
> It is therefore not possible to do:
> 1. copyToLocalFile(hdfsFile, localFile)       // creates checksum file
> 2. modify localFile
> 3. copyFromLocalFile(localFile, hdfsFile)  // uses old checksum
> Solution: do not reuse checksum files, or add a parameter  to copyFromLocalFile that
specifies that checksum files should not be reused.

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