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From "Alessandro Benedetti (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-9360) Solr script not properly checking SOLR_PID
Date Tue, 23 Aug 2016 14:14:21 GMT

    [ https://issues.apache.org/jira/browse/SOLR-9360?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15432858#comment-15432858
] 

Alessandro Benedetti commented on SOLR-9360:
--------------------------------------------

Thanks Erick, the only reason I tagged you is because I saw you working on some "script" related
Jiras :)
To be fair, I hope someone illuminates us as I have limited experience in sys admin tasks,
but at least it worked :)

Cheers

> Solr script not properly checking SOLR_PID
> ------------------------------------------
>
>                 Key: SOLR-9360
>                 URL: https://issues.apache.org/jira/browse/SOLR-9360
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: scripts and tools
>    Affects Versions: 6.1
>            Reporter: Alessandro Benedetti
>            Assignee: Erick Erickson
>         Attachments: SOLR_9360.patch
>
>
> In the solr script we see in 3-4 areas  this check :
> SOLR_PID=`ps auxww | grep start\.jar | grep -w $SOLR_PORT | grep -v grep | awk '{print
$2}' | sort -r`
> This can potentially prevent a solr instance to start in the case another process by
any chance contains the port int the command itself ( not necessarily actually using the port)
.
> e.g.
> java -server -Djetty.port=10504 -DSTOP.PORT=9504 -DSTOP.KEY=solrrocks -DMASTER_CORE_URL=external-server:10500/solr
-jar start.jar --module=http
> A solr is running on 10504.
> A new Solr will not be able to start on 10500 ( but actually the port is free).
> This should be replaced by a real check if the port is used ( like netstat or similar)
.



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