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From "Samir Ahmic (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16044) Fix 'hbase shell' output parsing in bash scripts
Date Thu, 16 Jun 2016 17:20:05 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15334203#comment-15334203
] 

Samir Ahmic commented on HBASE-16044:
-------------------------------------

I think it was [ HBASE-15849 | https://issues.apache.org/jira/browse/HBASE-15849] by adding
this line:
{code}
+        formatter.output_str("Took %.4f seconds" % [@end_time - @start_time])
{code}

It is simple fix in graceful_stop.sh and rolling-restart.sh just "tail -2" instead fo "tail
-3". 

> Fix 'hbase shell' output parsing in bash scripts
> ------------------------------------------------
>
>                 Key: HBASE-16044
>                 URL: https://issues.apache.org/jira/browse/HBASE-16044
>             Project: HBase
>          Issue Type: Bug
>          Components: scripts
>    Affects Versions: 2.0.0
>            Reporter: Samir Ahmic
>            Assignee: Samir Ahmic
>            Priority: Critical
>             Fix For: 2.0.0
>
>
> In some of our bash scripts we are piping command in hbase shell and then parsing response
to define variables.  Since 'hbase shell' output format is changed we are picking wrong values
from output Here is example form gracful_stop.sh:
> {code}
> HBASE_BALANCER_STATE=$(echo 'balance_switch false' | "$bin"/hbase --config "${HBASE_CONF_DIR}"
shell | tail -3 | head -1)
> {code}
> this will return "balance_switch true" instead of previous balancer  state.



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