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From Shankar hiremath <shankar.hirem...@huawei.com>
Subject RE: RegionServer many socket fds are in CLOSE_WAIT and not getting cleared
Date Thu, 24 Jul 2014 07:03:15 GMT
Hi Ram,

Actually It is not file FD, it is socket FD which is in CLOSE_WAIT state (tcp socket connection)

> java    18028 shankar1  194u  IPv6 18548560      0t0  TCP
> XX-XX-XX-XX:62675->XX-XX-XX-XX:busboy (CLOSE_WAIT)

Regards
-Shankar


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-----Original Message-----
From: ramkrishna vasudevan [mailto:ramkrishna.s.vasudevan@gmail.com] 
Sent: 24 July 2014 PM 12:23
To: user@hbase.apache.org
Subject: Re: RegionServer many socket fds are in CLOSE_WAIT and not getting cleared

Does your regions have store files in them?
In HBase all the store files are opened and the readers are kept open always when the region
opening happens.  When there is a compaction happening the count of those file handlers open
gets reduced based on the number of files compacted.

Regards
Ram


On Thu, Jul 24, 2014 at 12:19 PM, Shankar hiremath < shankar.hiremath@huawei.com> wrote:

> Dear All,
>
> Observation:
> I have HBase cluster with Kerberos enabled, when the Region Server 
> startups then we observed some 20-30 socket fds are in CLOSE_WAIT 
> state, After that when the Region Server starts opening then the 
> socket fds in CLOSE_WAIT starts increasing gradually (almost same as 
> number of regions opened by the region server) And all these 
> CLOSE_WAIT states are not getting cleared up,
>
> /hbase> lsof -i | grep `jps | grep RegionServer | cut -d " " -f1`
> java    18028 shankar1  118u  IPv6 18552894      0t0  TCP
> XX-XX-XX-XX:60020 (LISTEN)
> java    18028 shankar1  160u  IPv6 18548520      0t0  TCP *:60030 (LISTEN)
> java    18028 shankar1  167u  IPv6 18548522      0t0  TCP
> XX-XX-XX-XX:42534-> XX-XX-XX-XX:eforward (ESTABLISHED)
> java    18028 shankar1  172u  IPv6 18552916      0t0  TCP
> XX-XX-XX-XX:42535-> XX-XX-XX-XX:eforward (ESTABLISHED)
> java    18028 shankar1  173u  IPv6 18551227      0t0  TCP
> XX-XX-XX-XX:49646->XX-XX-XX-XX:60000 (ESTABLISHED)
> java    18028 shankar1  178u  IPv6 18551237      0t0  TCP
> XX-XX-XX-XX:62668->XX-XX-XX-XX:busboy (ESTABLISHED)
> java    18028 shankar1  185u  IPv6 18548549      0t0  TCP
> XX-XX-XX-XX:21856-> XX-XX-XX-XX:eforward (ESTABLISHED)
> java    18028 shankar1  187u  IPv6 18548558      0t0  TCP
> XX-XX-XX-XX:62673->XX-XX-XX-XX:busboy (ESTABLISHED)
> java    18028 shankar1  188u  IPv6 18601323      0t0  TCP
> XX-XX-XX-XX:63168->XX-XX-XX-XX:busboy (CLOSE_WAIT)
> java    18028 shankar1  189u  IPv6 18601322      0t0  TCP
> XX-XX-XX-XX:63167->XX-XX-XX-XX:busboy (CLOSE_WAIT)
> java    18028 shankar1  190u  IPv6 18601324      0t0  TCP
> XX-XX-XX-XX:63169->XX-XX-XX-XX:busboy (CLOSE_WAIT)
> java    18028 shankar1  191r  IPv6 18592423      0t0  TCP
> XX-XX-XX-XX:63087->XX-XX-XX-XX:busboy (CLOSE_WAIT)
> java    18028 shankar1  193u  IPv6 18593210      0t0  TCP
> XX-XX-XX-XX:63090->XX-XX-XX-XX:busboy (CLOSE_WAIT)
> java    18028 shankar1  194u  IPv6 18548560      0t0  TCP
> XX-XX-XX-XX:62675->XX-XX-XX-XX:busboy (CLOSE_WAIT)
> java    18028 shankar1  195u  IPv6 18592428      0t0  TCP
> XX-XX-XX-XX:63093->XX-XX-XX-XX:busboy (CLOSE_WAIT)
> java    18028 shankar1  196u  IPv6 18593218      0t0  TCP
> XX-XX-XX-XX:63096->XX-XX-XX-XX:busboy (CLOSE_WAIT)
> java    18028 shankar1  197u  IPv6 18591423      0t0  TCP
> XX-XX-XX-XX:63105->XX-XX-XX-XX:busboy (CLOSE_WAIT)
> java    18028 shankar1  201u  IPv6 18592431      0t0  TCP
> XX-XX-XX-XX:63099->XX-XX-XX-XX:busboy (CLOSE_WAIT)
> java    18028 shankar1  202u  IPv6 18592433      0t0  TCP
> XX-XX-XX-XX:63102->XX-XX-XX-XX:busboy (CLOSE_WAIT)
> java    18028 shankar1  203u  IPv6 18552317      0t0  TCP
> XX-XX-XX-XX:62681->XX-XX-XX-XX:busboy (CLOSE_WAIT)
>
> ............................................................................................................
>
> ............................................................................................................
>
> ............................................................................................................
>
> ............................................................................................................
>
> ............................................................................................................
>
> any input or suggestion will be helpful, or is it a bug.
>
> Regards
> -Shankar
>
>
> [X]
> This e-mail and its attachments contain confidential information from 
> HUAWEI, which is intended only for the person or entity whose address 
> is listed above. Any use of the information contained herein in any 
> way (including, but not limited to, total or partial disclosure, 
> reproduction, or dissemination) by persons other than the intended 
> recipient(s) is prohibited. If you receive this e-mail in error, 
> please notify the sender by phone or email immediately and delete it!
> [X]
>
>
>
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