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https://issues.apache.org/jira/browse/KYLIN-2699?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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qiumingming updated KYLIN-2699:
-------------------------------
Attachment: KYLIN-2699.patch
I contribute a patch for this issue.
> Tomcat LinkageError for curator-client jar file conflict
> --------------------------------------------------------
>
> Key: KYLIN-2699
> URL: https://issues.apache.org/jira/browse/KYLIN-2699
> Project: Kylin
> Issue Type: Bug
> Components: Job Engine, Web
> Affects Versions: v2.0.0
> Reporter: qiumingming
> Assignee: Dong Li
> Attachments: KYLIN-2699.patch
>
>
> Exception: java.lang.LinkageError: loader constraint violation: loader
> (instance of sun/misc/Launcher$AppClassLoader) previously initiated loading
> for a different type with name "org/apache/curator/RetryPolicy"
> at java.lang.ClassLoader.defineClass1(Native Method)
> at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
> at
> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
> at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
> at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
> at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
> at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
> at java.security.AccessController.doPrivileged(Native Method)
> at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
> at
> org.apache.curator.CuratorZookeeperClient.<init>(CuratorZookeeperClient.java:97)
> at
> org.apache.curator.framework.imps.CuratorFrameworkImpl.<init>(CuratorFrameworkImpl.java:108)
> at
> org.apache.curator.framework.CuratorFrameworkFactory$Builder.build(CuratorFrameworkFactory.java:124)
> at
> org.apache.kylin.storage.hbase.util.ZookeeperJobLock.lock(ZookeeperJobLock.java:70)
> at
> org.apache.kylin.job.impl.threadpool.DefaultScheduler.init(DefaultScheduler.java:208)
> at org.apache.kylin.rest.service.JobService$1.run(JobService.java:116)
> at java.lang.Thread.run(Thread.java:745)
> This exception will make kylin job engine does not work. And I found it
> occured because in the kylin/WEB-INF/lib contains the
> curator-client-2.7.1.jar which make some conflicts. In general, the HBase and
> Hadoop cluster always contain their own curator-client jar files. So there is
> no need to include the curator-client jar file in kylin/WEB-INF/lib.
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