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From Mahadev Konar <maha...@yahoo-inc.com>
Subject Re: Would this work?
Date Tue, 20 Apr 2010 20:37:16 GMT
Hi Avinash,
 This mostly looks like the zookeeper client is not able to find the
zookeeper server running on the port that you have specified it on.

Are you sure you are running zookeeper server on the port you are passing to
the zookeeper client? You can check by running

Echo stat| nc localhost port


To see if the server is running or not.


Thanks
mahadev


On 4/20/10 1:25 PM, "Avinash Lakshman" <avinash.lakshman@gmail.com> wrote:

> Hi All
> 
> This may sound weird but I want to know if there is something inherent that
> would preclude this from working. I want to have a thrift based service
> which exposes some API to read/write to certain znodes. I want ZK to run
> within the same process. So I will start the ZK process from within my main
> using QuorumPeerMain.main(). Now the implementation of my API would
> instantiate a ZooKeeper object and try reading/writing from specific znodes
> as the case may be. I tried running this and as soon as I instantiate my
> ZooKeeper object I get some really weird exceptions. What is wrong in this
> approach? Here is a snapshot of the stack trace:
> 
> 2010-04-20 13:14:31,551 - INFO  [pool-1-thread-1:Environment@97] - Client
> environment:zookeeper.version=3.1.1-755636, built on 03/18/2009 16:52 GMT
> 2010-04-20 13:14:31,552 - INFO  [pool-1-thread-1:Environment@97] - Client
> environment:host.name=a.b.c.com
> 2010-04-20 13:14:31,552 - INFO  [pool-1-thread-1:Environment@97] - Client
> environment:java.version=1.7.0-ea
> 2010-04-20 13:14:31,552 - INFO  [pool-1-thread-1:Environment@97] - Client
> environment:java.vendor=Sun Microsystems Inc.
> 2010-04-20 13:14:31,553 - INFO  [pool-1-thread-1:Environment@97] - Client
> environment:java.home=/usr/local/jdk1.7-drop/jre
> 2010-04-20 13:14:31,553 - INFO  [pool-1-thread-1:Environment@97] - Client
> environment:java.class.path=config/:lib/zookeeper-3.1.1.jar:lib/log4j-1.2.15.j
> ar:lib/antlr-2.7.7.jar:li
> b/antlr-3.0.1.jar:lib/atlas.jar:lib/commons-cli-1.1.jar:lib/DiscoveryService.j
> ar:lib/fb303.jar:lib/if-java.jar:lib/jline-0.9.94.jar:lib/stringtemplate-3.0.j
> ar:lib/thrift.jar:lib
> /atlasimpl.jar:lib/slf4j-api-1.5.8.jar:lib/slf4j-log4j12-1.5.8.jar
> 2010-04-20 13:14:31,553 - INFO  [pool-1-thread-1:Environment@97] - Client
> environment:java.library.path=/usr/local/jdk1.7-drop/jre/lib/amd64/server:/usr
> /local/jdk1.7-drop/jre/li
> b/amd64:/usr/local/jdk1.7-drop/jre/../lib/amd64:/usr/java/packages/lib/amd64:/
> lib:/usr/lib
> 2010-04-20 13:14:31,554 - INFO  [pool-1-thread-1:Environment@97] - Client
> environment:java.io.tmpdir=/tmp
> 2010-04-20 13:14:31,554 - INFO  [pool-1-thread-1:Environment@97] - Client
> environment:java.compiler=<NA>
> 2010-04-20 13:14:31,554 - INFO  [pool-1-thread-1:Environment@97] - Client
> environment:os.name=Linux
> 2010-04-20 13:14:31,555 - INFO  [pool-1-thread-1:Environment@97] - Client
> environment:os.arch=amd64
> 2010-04-20 13:14:31,555 - INFO  [pool-1-thread-1:Environment@97] - Client
> environment:os.version=2.6.12-1.1398_FC4smp
> 2010-04-20 13:14:31,555 - INFO  [pool-1-thread-1:Environment@97] - Client
> environment:user.name=root
> 2010-04-20 13:14:31,555 - INFO  [pool-1-thread-1:Environment@97] - Client
> environment:user.home=/root
> 2010-04-20 13:14:31,556 - INFO  [pool-1-thread-1:Environment@97] - Client
> environment:user.dir=/var/myservice
> 2010-04-20 13:14:31,557 - INFO  [pool-1-thread-1:ZooKeeper@341] - Initiating
> client connection, host=a.b.c.com sessionTimeout=10000
> watcher=a.b.c.MyClass@716c9867
> 2010-04-20 13:14:31,558 - INFO  [pool-1-thread-1:ClientCnxn@91] -
> zookeeper.disableAutoWatchReset is false
> 2010-04-20 13:14:31,566 - INFO
>  [pool-1-thread-1-SendThread:ClientCnxn$SendThread@800] - Attempting
> connection to server a.b.c.com/10.18.39.211:2181
> 2010-04-20 13:14:31,567 - WARN
>  [pool-1-thread-1-SendThread:ClientCnxn$SendThread@898] - Exception closing
> session 0x0 to sun.nio.ch.SelectionKeyImpl@7b2884e0
> java.net.ConnectException: Connection refused
>         at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
>         at
> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:592)
>         at
> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:864)
> 2010-04-20 13:14:31,568 - WARN
>  [pool-1-thread-1-SendThread:ClientCnxn$SendThread@932] - Ignoring exception
> during shutdown input
> java.nio.channels.ClosedChannelException
>         at
> sun.nio.ch.SocketChannelImpl.shutdownInput(SocketChannelImpl.java:656)
>         at sun.nio.ch.SocketAdaptor.shutdownInput(SocketAdaptor.java:378)
>         at
> org.apache.zookeeper.ClientCnxn$SendThread.cleanup(ClientCnxn.java:930)
>         at
> org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:901)


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