Hi Chris, I tried to mount /hdfs with java versions below but there was no change in output. jre-7u21 jdk-7u21 jdk-7u55 jdk1.6.0_31 jdk1.6.0_45
On Thu, Jul 17, 2014 at 6:56 PM, Chris Mawata <[email protected]> wrote: > Version 51 ia Java 7 > Chris > On Jul 17, 2014 7:50 PM, "andrew touchet" <[email protected]> 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 >> >> >> >> >>
