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Zookeeper, mail # user - java.lang.NoClassDefFoundError: org/apache/zookeeper/server/ZooTrace


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java.lang.NoClassDefFoundError: org/apache/zookeeper/server/ZooTrace
ruxing bao 2013-06-09, 04:08
I'am using Zookeeper client API in java web application.When I shut down tomcat,I am getting this error :

 

2013-06-07 12:01:29,676 ERROR [org.apache.zookeeper.ClientCnxn] (xxx-startStop-1-SendThread(xxx.net:12183)) from xxx-startStop-1-SendThread(xxx.net:12183)
java.lang.NoClassDefFoundError: org/apache/zookeeper/server/ZooTrace
 at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1115)
Caused by: java.lang.ClassNotFoundException: org.apache.zookeeper.server.ZooTrace
 at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1711)
 at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
 ... 1 more

 
at the same time,the following is also in catalina.out:

 

INFO: Illegal access: this web application instance has been stopped already.  Could not load org.apache.zookeeper.server.ZooTrace.  The eventual following stack trace is caused by an error thrown for debugging purposes as well as to attempt to terminate the thread which caused the illegal access, and has no functional impact.
java.lang.IllegalStateException
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1597)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556)
        at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1115)

 

I searched google and mail list ,couldn't find any solution,please help me.
Enviroment info:

JDK:1.6.0_45

Tomcat:7.0.40

Zookeeper:3.4.5

 

Thanks,

Bob