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Posted to common-dev@hadoop.apache.org by "Doug Cutting (JIRA)" <ji...@apache.org> on 2007/04/25 22:59:15 UTC
[jira] Commented: (HADOOP-1295) hadoop-config.sh resolving symlinks
leads to errors
[ https://issues.apache.org/jira/browse/HADOOP-1295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12491769 ]
Doug Cutting commented on HADOOP-1295:
--------------------------------------
I think this is for when someone makes a link to bin/hadoop in, e.g., ~/bin. When this is done, $this/.. is not the hadoop root but rather ~/bin, and the symlink must thus be resolved. Does that make sense?
> hadoop-config.sh resolving symlinks leads to errors
> ----------------------------------------------------
>
> Key: HADOOP-1295
> URL: https://issues.apache.org/jira/browse/HADOOP-1295
> Project: Hadoop
> Issue Type: Improvement
> Components: scripts
> Environment: RHEL3
> Reporter: Lee Faris
> Priority: Minor
>
> My company uses a versioned deployment system where the final results are symlinked.
> For example:The hadoop package would be located at this location on all boxes
> /apollo/env/Hadoop/
> This is a symlink generated by the system. The hardlink can look like this:
> box1: /apollo/env/Hadoop -> /apollo/version/Hadoop-11114456
> box2: /apollo/env/Hadoop -> /apollo/version/Hadoop-10039445
> This piece of script from hadoop-config.sh resolves symlinks into hard links:
> while [ -h "$this" ]; do
> ls=`ls -ld "$this"`
> link=`expr "$ls" : '.*-> \(.*\)$'`
> if expr "$link" : '.*/.*' > /dev/null; then
> this="$link"
> else
> this=`dirname "$this"`/"$link"
> fi
> done
> I am not sure why this is done. Commenting out the code makes things work for our system.
> I assume that was put in for a reason. Is there a solution for the original need for this code to that can work with our use case?
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