Yes, right, that's what I meant to say - what is causing the client to
"die", throwing read error on the server side, and then later you end up
with the session expiration because the client was not closed gracefully.
(thanks mahadev)
Patrick
Mahadev Konar wrote:
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
