I noticed the blockSeek() call in HFileReaderV2. Did you take only one dump during the 20 minute hang ?
Cheers On Jul 10, 2014, at 1:54 AM, Rural Hunter <ruralhun...@gmail.com> wrote: > I got the dump of the problematic rs from web ui: http://pastebin.com/4hfhkDUw > output of "top -H -p <PID>": http://pastebin.com/LtzkScYY > I also got the output of jstack but I believe it's already in the dump so I > do not paste it again. This time the hang lasted about 20 minutes. > > 于 2014/7/9 12:48, Esteban Gutierrez 写道: >> Hi Rural, >> >> Thats interesting. Since you are passing >> hbase.zookeeper.property.maxClientCnxns does it means that ZK is managed by >> HBase? If you experience the issue again, can you try to obtain a jstack >> (as the user that started the hbase process or try from the RS UI if >> responsive rs:port/dump) as Ted suggested? the output of "top -H -p <PID>" >> might be useful too where <PID> is the pid of the RS. If you have some >> metrics monitoring it would be interesting to see how callQueueLength and >> the blocked threads change over time. >> >> cheers, >> esteban. >> >> >> -- >> Cloudera, Inc. >
