[jira] Commented: (HADOOP-4090) The configuration file lists two paths to hadoop directories (bin and conf). Startup should check that these are valid directories and give appropriate messages.

["Raghotham Murthy (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-4090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12628702#action_12628702 ] 

Raghotham Murthy commented on HADOOP-4090:
------------------------------------------

Right now, the CLI (shell script) looks for
1. hadoop in path
2. env variable HADOOP
Then, the clidriver looks at two hadoop paths in the xml

All of this can be replaced by just HADOOP_HOME env variable which is already used by hadoop. 

Another approach is what PIG does. It requires specification of HADOOPSITEPATH (directory containing hadoop-site.xml). hadoop bin is picked up from $HADOOPSITEPATH/../bin/hadoop. This will allow users to have multiple hadoop sites with the same bin directory.

> The configuration file lists two paths to hadoop directories (bin and conf).  Startup should check that these are valid directories and give appropriate messages.
> ------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-4090
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4090
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: contrib/hive
>            Reporter: Ashish Thusoo
>            Priority: Minor
>
> The configuration file lists two paths to hadoop directories (bin and conf).  Startup should check that these are valid directories and give appropriate messages.
> Reported by Chad.

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