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Posted to common-issues@hadoop.apache.org by "Colin Patrick McCabe (JIRA)" <ji...@apache.org> on 2012/11/19 19:17:58 UTC
[jira] [Commented] (HADOOP-9061) Java6+Windows does not work well
with symlinks
[ https://issues.apache.org/jira/browse/HADOOP-9061?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13500453#comment-13500453 ]
Colin Patrick McCabe commented on HADOOP-9061:
----------------------------------------------
One way to handle this would be to disable symlinks on Windows unless JDK7 is present. Another way would be a symlink-aware implementation of operations like {{File#renameTo}} on JDK6 and earlier. This would have to be JNI, I think, and could be done in {{libhadoop.so}}.
> Java6+Windows does not work well with symlinks
> ----------------------------------------------
>
> Key: HADOOP-9061
> URL: https://issues.apache.org/jira/browse/HADOOP-9061
> Project: Hadoop Common
> Issue Type: Bug
> Affects Versions: 1-win
> Reporter: Ivan Mitic
> Assignee: Ivan Mitic
>
> We’ve seen multiple problems with file operations on symbolic links on Java6 on Windows. Specifically:
> - File#length returns zero on symbolic links
> - File#renameTo renames the target, not the symlink
> Problematic scenarios are mainly related to symlinks created for dist cache.
> Java7 does not have above problems.
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