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From "Min Zhou (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TAJO-525) Concurrent queries hang
Date Mon, 20 Jan 2014 02:12:20 GMT

    [ https://issues.apache.org/jira/browse/TAJO-525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13876090#comment-13876090
] 

Min Zhou commented on TAJO-525:
-------------------------------

After a while, closed those two sessions and launched another one,  got another exception

{noformat}

tajo> select count(1) from lineitem ;
26.103: [GC 26.103: [ParNew: 17981K->951K(19136K), 0.0034090 secs] 19432K->2408K(128960K),
0.0035000 secs] [Times: user=0.04 sys=0.00, real=0.00 secs] 
Progress: 0%, response time: 1.033 sec
Progress: 0%, response time: 2.064 sec
Progress: 0%, response time: 3.09 sec
Progress: 0%, response time: 4.115 sec
Progress: 0%, response time: 5.197 sec
Progress: 0%, response time: 6.221 sec
Progress: 0%, response time: 7.245 sec
Progress: 0%, response time: 8.269 sec
Progress: 0%, response time: 9.293 sec
Progress: 0%, response time: 10.319 sec
36.458: [GC 36.458: [ParNew: 17975K->972K(19136K), 0.0029600 secs] 19432K->2489K(128960K),
0.0030540 secs] [Times: user=0.02 sys=0.01, real=0.00 secs] 
Progress: 1%, response time: 11.349 sec
Progress: 1%, response time: 12.374 sec
Progress: 1%, response time: 13.398 sec
Progress: 1%, response time: 14.422 sec
Progress: 2%, response time: 15.446 sec
Progress: 2%, response time: 16.469 sec
Progress: 2%, response time: 17.492 sec
Progress: 2%, response time: 18.516 sec
Progress: 2%, response time: 19.536 sec
Progress: 3%, response time: 20.56 sec
Progress: 3%, response time: 21.583 sec
Internal error!
{noformat}

> Concurrent queries hang
> -----------------------
>
>                 Key: TAJO-525
>                 URL: https://issues.apache.org/jira/browse/TAJO-525
>             Project: Tajo
>          Issue Type: Bug
>    Affects Versions: 0.8-incubating
>            Reporter: Min Zhou
>            Priority: Critical
>             Fix For: 0.8-incubating
>
>
> When I run a simple query "select count(1) from lineitem;" in one tsql session and after
that run the 2nd query in another tsql session.  The 2nd one hung.  
> After the 1st one done,  the 2nd one still stuck at 0%.
> After that, run the same query in the first tsql session, the 3rd query also hung.  



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