That should be the case since the server gets an exception reading from the socket - meaning the client went away (not gracefully) and that leads the server to expire the session in 30 seconds.
mahadev On 11/20/09 4:35 PM, "Patrick Hunt" <ph...@apache.org> wrote: > Oops too late. ;-) > > I'm perplexed as to why you see all these expirations though. Are you > killing your clients, ie not cleaning up the ZK session gracefully via > close()? > > Patrick > > stack wrote: >> Please disregard. Sorry for the noise (Patrick, of note, I am seeing this >> session timeout on a cluster other than Zhenyus). >> St.Ack >> >> On Fri, Nov 20, 2009 at 4:24 PM, stack <st...@duboce.net> wrote: >> >>> Sorry, I had a bad subject on the below question. >>> St.Ack >>> >>> On Fri, Nov 20, 2009 at 4:22 PM, stack <st...@duboce.net> wrote: >>> >>>> Below an excerpt from a single node zk quorum that was at heart of a small >>>> hbase cluster. Unfortunately the log is not at DEBUG level (I've asked the >>>> gentleman to up the log level meantime). What it seems to be reporting is >>>> that an exception while closing a session caused it to timeout all >>>> connected >>>> sessions. >>>> >>>> Here is the line that mentions the exception on close of session. There >>>> is no stack trace: >>>> >>>> 2009-11-20 03:41:04,766 WARN org.apache.zookeeper.server.NIOServerCnxn: >>>> Exception causing close of session 0x124bc250d700790 due to >>>> java.io.IOException: Read error >>>> >>>> Is it correct that an error at this stage throws out all connected >>>> sessions? >>>> >>>> Thanks, >>>> St.Ack >>>> >>>> >>>> 2009-11-20 00:00:04,948 INFO org.apache.zookeeper.server.NIOServerCnxn: >>>> Connected to /10.1.20.101:50716 lastZxid 0 >>>> 2009-11-20 00:00:04,982 INFO org.apache.zookeeper.server.NIOServerCnxn: >>>> Creating new session 0x1250f26319f0016 >>>> 2009-11-20 00:00:05,051 INFO org.apache.zookeeper.server.NIOServerCnxn: >>>> Finished init of 0x1250f26319f0016 valid:true >>>> 2009-11-20 00:00:05,051 WARN >>>> org.apache.zookeeper.server.PrepRequestProcessor: Got exception when >>>> processing sessionid:0x1250f26319f0016 type:create c >>>> xid:0x1 zxid:0xfffffffffffffffe txntype:unknown n/a >>>> org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode >>>> = NodeExists >>>> at >>>> org.apache.zookeeper.server.PrepRequestProcessor.pRequest(PrepRequestProces >>>> sor.java:245) >>>> at >>>> org.apache.zookeeper.server.PrepRequestProcessor.run(PrepRequestProcessor.j >>>> ava:114) >>>> 2009-11-20 00:00:40,150 WARN >>>> org.apache.zookeeper.server.PrepRequestProcessor: Got exception when >>>> processing sessionid:0x1250f26319f0016 type:create c >>>> xid:0x4 zxid:0xfffffffffffffffe txntype:unknown n/a >>>> org.apache.zookeeper.KeeperException$NodeExistsException: KeeperErrorCode >>>> = NodeExists >>>> at >>>> org.apache.zookeeper.server.PrepRequestProcessor.pRequest(PrepRequestProces >>>> sor.java:245) >>>> at >>>> org.apache.zookeeper.server.PrepRequestProcessor.run(PrepRequestProcessor.j >>>> ava:114) >>>> 2009-11-20 00:00:50,428 WARN org.apache.zookeeper.server.NIOServerCnxn: >>>> Exception causing close of session 0x1250f26319f0016 due to >>>> java.io.IOExceptio >>>> n: Read error >>>> 2009-11-20 00:00:50,429 INFO org.apache.zookeeper.server.NIOServerCnxn: >>>> closing session:0x1250f26319f0016 NIOServerCnxn: >>>> java.nio.channels.SocketChann >>>> el[connected local=/10.1.20.101:2181 remote=/10.1.20.101:50716] >>>> 2009-11-20 00:01:22,002 INFO >>>> org.apache.zookeeper.server.SessionTrackerImpl: Expiring session >>>> 0x1250f26319f0016 >>>> 2009-11-20 00:01:22,002 INFO org.apache.zookeeper.server.ZooKeeperServer: >>>> Expiring session 0x1250f26319f0016 >>>> 2009-11-20 00:01:22,002 INFO >>>> org.apache.zookeeper.server.PrepRequestProcessor: Processed session >>>> termination request for id: 0x1250f26319f0016 >>>> 2009-11-20 03:41:04,766 WARN org.apache.zookeeper.server.NIOServerCnxn: >>>> Exception causing close of session 0x124bc250d700790 due to >>>> java.io.IOExceptio >>>> n: Read error >>>> 2009-11-20 03:41:04,864 INFO >>>> org.apache.zookeeper.server.SessionTrackerImpl: Expiring session >>>> 0x1250f26319f0000 >>>> 2009-11-20 03:41:04,927 INFO org.apache.zookeeper.server.ZooKeeperServer: >>>> Expiring session 0x1250f26319f0000 >>>> 2009-11-20 03:41:04,927 INFO >>>> org.apache.zookeeper.server.SessionTrackerImpl: Expiring session >>>> 0x124bc250d7007a2 >>>> 2009-11-20 03:41:04,927 INFO org.apache.zookeeper.server.ZooKeeperServer: >>>> Expiring session 0x124bc250d7007a2 >>>> 2009-11-20 03:41:04,927 INFO >>>> org.apache.zookeeper.server.SessionTrackerImpl: Expiring session >>>> 0x124bc250d700794 >>>> 2009-11-20 03:41:04,927 INFO org.apache.zookeeper.server.ZooKeeperServer: >>>> Expiring session 0x124bc250d700794 >>>> >>>> >>>> >>
