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From Avinash Lakshman <avinash.laksh...@gmail.com>
Subject Would this work?
Date Tue, 20 Apr 2010 20:25:14 GMT
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.jar:lib/antlr-2.7.7.jar:li
b/antlr-3.0.1.jar:lib/atlas.jar:lib/commons-cli-1.1.jar:lib/DiscoveryService.jar:lib/fb303.jar:lib/if-java.jar:lib/jline-0.9.94.jar:lib/stringtemplate-3.0.jar: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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