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From Shankar hiremath <shankar.hirem...@huawei.com>
Subject RegionServer many socket fds are in CLOSE_WAIT and not getting cleared
Date Thu, 24 Jul 2014 06:04:34 GMT
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->host-10-18-40-52:eforward
(ESTABLISHED)
java    18028 shankar1  172u  IPv6 18552916      0t0  TCP XX-XX-XX-XX:42535->host-10-18-40-52: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->host-10-18-40-134: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)
............................................................................................................
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any input or suggestion will be helpful, or is it a bug.

Regards
-Shankar

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