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Posted to common-dev@hadoop.apache.org by "Wendy Chien (JIRA)" <ji...@apache.org> on 2006/09/13 03:20:29 UTC
[jira] Assigned: (HADOOP-438) DFS pathname limitation.
[ http://issues.apache.org/jira/browse/HADOOP-438?page=all ]
Wendy Chien reassigned HADOOP-438:
----------------------------------
Assignee: Wendy Chien
> DFS pathname limitation.
> ------------------------
>
> Key: HADOOP-438
> URL: http://issues.apache.org/jira/browse/HADOOP-438
> Project: Hadoop
> Issue Type: Bug
> Components: dfs
> Affects Versions: 0.5.0, 0.4.0, 0.3.2, 0.3.1, 0.3.0, 0.2.1, 0.2.0, 0.1.1, 0.1.0
> Reporter: Konstantin Shvachko
> Assigned To: Wendy Chien
> Attachments: pathlength.patch
>
>
> I was trying to create a deep hierarchy of directories using DFS mkdirs().
> When the path to the leaf directory became long (~20000) DFS was still able to create
> directories with these names, but UTF8 started truncating long strings resulting in
> incorrect logging of namespace edits. That later crashed the namenode during restart,
> when it was trying to reproduce file creation logged in the edits file with truncated names.
> UTF8 is deprecated now so we will have to replace it with Text.
> With UTF8 we should enforce a pathname limit of 0xffff/3 = 21845
> With Text it is going to be larger. Not sure what the exact number is.
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