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Anu Engineer commented on HDDS-1431: ------------------------------------ [~elek] FYI. > Linkage error thrown if ozone-fs-legacy jar is on the classpath > --------------------------------------------------------------- > > Key: HDDS-1431 > URL: https://issues.apache.org/jira/browse/HDDS-1431 > Project: Hadoop Distributed Data Store > Issue Type: Bug > Components: Ozone Filesystem > Affects Versions: 0.5.0 > Reporter: Siddharth Wagle > Priority: Major > > With hadoop-ozone-filesystem-lib-legacy-0.5.0-SNAPSHOT.jar on the classpath > along with current jar results in classloader throwing an error on fs write > operation as below: > {code} > 2019-04-11 16:06:54,127 ERROR [OzoneClientAdapterFactory] Can't initialize > the ozoneClientAdapter > java.lang.reflect.InvocationTargetException > at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native > Method) > at > sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) > at > sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) > at java.lang.reflect.Constructor.newInstance(Constructor.java:423) > at > org.apache.hadoop.fs.ozone.OzoneClientAdapterFactory.lambda$createAdapter$1(OzoneClientAdapterFactory.java:66) > at > org.apache.hadoop.fs.ozone.OzoneClientAdapterFactory.createAdapter(OzoneClientAdapterFactory.java:116) > at > org.apache.hadoop.fs.ozone.OzoneClientAdapterFactory.createAdapter(OzoneClientAdapterFactory.java:62) > at > org.apache.hadoop.fs.ozone.OzoneFileSystem.createAdapter(OzoneFileSystem.java:92) > at > org.apache.hadoop.fs.ozone.BasicOzoneFileSystem.initialize(BasicOzoneFileSystem.java:146) > at > org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:3303) > at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:124) > at > org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:3352) > at > org.apache.hadoop.fs.FileSystem$Cache.getUnique(FileSystem.java:3326) > at org.apache.hadoop.fs.FileSystem.newInstance(FileSystem.java:532) > at org.notmysock.repl.Works$CopyWorker.run(Works.java:252) > at org.notmysock.repl.Works$CopyWorker.call(Works.java:287) > at org.notmysock.repl.Works$CopyWorker.call(Works.java:207) > at java.util.concurrent.FutureTask.run(FutureTask.java:266) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) > at java.lang.Thread.run(Thread.java:748) > Caused by: java.lang.LinkageError: loader constraint violation: loader > (instance of org/apache/hadoop/fs/ozone/FilteredClassLoader) previously > initiated loading for a different t > ype with name "org/apache/hadoop/crypto/key/KeyProvider" > 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$1.run(URLClassLoader.java:362) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(URLClassLoader.java:361) > at java.lang.ClassLoader.loadClass(ClassLoader.java:424) > at java.lang.ClassLoader.loadClass(ClassLoader.java:357) > at > org.apache.hadoop.fs.ozone.FilteredClassLoader.loadClass(FilteredClassLoader.java:72) > at java.lang.Class.getDeclaredMethods0(Native Method) > at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) > at java.lang.Class.privateGetPublicMethods(Class.java:2902) > at java.lang.Class.getMethods(Class.java:1615) > at sun.misc.ProxyGenerator.generateClassFile(ProxyGenerator.java:451) > at sun.misc.ProxyGenerator.generateProxyClass(ProxyGenerator.java:339) > at java.lang.reflect.Proxy$ProxyClassFactory.apply(Proxy.java:639) > at java.lang.reflect.Proxy$ProxyClassFactory.apply(Proxy.java:557) > at java.lang.reflect.WeakCache$Factory.get(WeakCache.java:230) > at java.lang.reflect.WeakCache.get(WeakCache.java:127) > at java.lang.reflect.Proxy.getProxyClass0(Proxy.java:419) > at java.lang.reflect.Proxy.newProxyInstance(Proxy.java:719) > at > org.apache.hadoop.ozone.client.OzoneClientFactory.getClient(OzoneClientFactory.java:264) > at > org.apache.hadoop.ozone.client.OzoneClientFactory.getRpcClient(OzoneClientFactory.java:169) > at > org.apache.hadoop.fs.ozone.BasicOzoneClientAdapterImpl.<init>(BasicOzoneClientAdapterImpl.java:133) > at > org.apache.hadoop.fs.ozone.BasicOzoneClientAdapterImpl.<init>(BasicOzoneClientAdapterImpl.java:97) > at > org.apache.hadoop.fs.ozone.BasicOzoneClientAdapterImpl.<init>(BasicOzoneClientAdapterImpl.java:82) > at > org.apache.hadoop.fs.ozone.OzoneClientAdapterImpl.<init>(OzoneClientAdapterImpl.java:34) > ... 21 more 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