Version 51 ia Java 7 Chris On Jul 17, 2014 7:50 PM, "andrew touchet" <adt...@latech.edu> wrote:
> Hello, > > Hadoop package installed: > hadoop-0.20-0.20.2+737-33.osg.el5.noarch > > Operating System: > CentOS release 5.8 (Final) > > I am mounting HDFS from my namenode to another node with fuse. After > mounting to /hdfs, any attempts to 'ls', 'cd', or use 'hadoop fs' leads to > the below output. > > > $ls /hdfs > *ls: /hdfs: Input/output error* > $hadoop fs -ls > > > > > > > > > > > > > > *Exception in thread "main" java.lang.UnsupportedClassVersionError: > org/apache/hadoop/fs/FsShell : Unsupported major.minor version 51.0 at > java.lang.ClassLoader.defineClass1(Native Method) at > java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at > java.lang.ClassLoader.defineClass(ClassLoader.java:615) at > java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) > at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at > java.net.URLClassLoader.access$000(URLClassLoader.java:58) at > java.net.URLClassLoader$1.run(URLClassLoader.java:197) at > java.security.AccessController.doPrivileged(Native Method) at > java.net.URLClassLoader.findClass(URLClassLoader.java:190) at > java.lang.ClassLoader.loadClass(ClassLoader.java:306) at > sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at > java.lang.ClassLoader.loadClass(ClassLoader.java:247) Could not find the > main class: org.apache.hadoop.fs.FsShell. Program will exit.* > > > I have attempted to mount /hdfs manually in debug mode and then attempted > to access /hdfs from a different terminal. This is the output. The namenode > is *glados*. The server where /hdfs is being mounted is *glados2*. > > > $hdfs -oserver=glados,port=9000,rdbuffer=131072,allow_other /hdfs -d > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > *fuse-dfs ignoring option allow_otherERROR fuse_options.c:162 fuse-dfs > didn't recognize /hdfs,-2fuse-dfs ignoring option -d unique: 1, opcode: > INIT (26), nodeid: 0, insize: 56INIT: > 7.10flags=0x0000000bmax_readahead=0x00020000INFO fuse_init.c:115 Mounting > glados:9000Exception in thread "main" > java.lang.UnsupportedClassVersionError: > org/apache/hadoop/conf/Configuration : Unsupported major.minor version 51.0 > at java.lang.ClassLoader.defineClass1(Native Method) at > java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at > java.lang.ClassLoader.defineClass(ClassLoader.java:615) at > java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) > at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at > java.net.URLClassLoader.access$000(URLClassLoader.java:58) at > java.net.URLClassLoader$1.run(URLClassLoader.java:197) at > java.security.AccessController.doPrivileged(Native Method) at > java.net.URLClassLoader.findClass(URLClassLoader.java:190) at > java.lang.ClassLoader.loadClass(ClassLoader.java:306) at > sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at > java.lang.ClassLoader.loadClass(ClassLoader.java:247) Can't construct > instance of class org.apache.hadoop.conf.ConfigurationERROR fuse_init.c:127 > Unable to establish test connection to server INIT: 7.8 > flags=0x00000001 max_readahead=0x00020000 max_write=0x00020000 > unique: 1, error: 0 (Success), outsize: 40unique: 2, opcode: GETATTR (3), > nodeid: 1, insize: 56Exception in thread "Thread-0" > java.lang.UnsupportedClassVersionError: > org/apache/hadoop/conf/Configuration : Unsupported major.minor version 51.0 > at java.lang.ClassLoader.defineClass1(Native Method) at > java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) at > java.lang.ClassLoader.defineClass(ClassLoader.java:615) at > java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) > at java.net.URLClassLoader.defineClass(URLClassLoader.java:283) at > java.net.URLClassLoader.access$000(URLClassLoader.java:58) at > java.net.URLClassLoader$1.run(URLClassLoader.java:197) at > java.security.AccessController.doPrivileged(Native Method) at > java.net.URLClassLoader.findClass(URLClassLoader.java:190) at > java.lang.ClassLoader.loadClass(ClassLoader.java:306) at > sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at > java.lang.ClassLoader.loadClass(ClassLoader.java:247) Can't construct > instance of class org.apache.hadoop.conf.ConfigurationERROR > fuse_connect.c:83 Unable to instantiate a filesystem for user027ERROR > fuse_impls_getattr.c:40 Could not connect to glados:9000 unique: 2, > error: -5 (Input/output error), outsize: 16 unique: 3, opcode: GETATTR (3), > nodeid: 1, insize: 56* > > I adopted this system after this was already setup, so I do not know which > java version was used during install. Currently I'm using: > > $java -version > > > *java version "1.6.0_45"Java(TM) SE Runtime Environment (build > 1.6.0_45-b06)Java HotSpot(TM) 64-Bit Server VM (build 20.45-b01, mixed > mode)* > > $java -version > > > > > > *java version "1.6.0_45" Java(TM) SE Runtime Environment (build > 1.6.0_45-b06)Java HotSpot(TM) 64-Bit Server VM (build 20.45-b01, mixed > mode)* > Is my java version really the cause of this issue? What is the correct > java version to be used for this version of hadoop. I have also tried > 1.6.0_31 but no changes were seen. > > If java isn't my issue, then what is? > > Best regards, > > Andrew > > > > >
