Thanks Chris! The issue was that even though I set jdk-7u21 as my default, it checked for /usr/java/jdk-1.6* first. Even though it was compiled with 1.7.
Is there anyway to generate a proper hadoop-config.sh to reflect the minor version hadoop was built with? So that in my case, it would check for /usr/java/jdk-1.7* instead? I appreciate the help! On Thu, Jul 17, 2014 at 11:11 PM, Chris Mawata <chris.maw...@gmail.com> wrote: > Yet another place to check -- in the hadoop-env.sh file there is also a > JAVA_HOME setting. > Chris > On Jul 17, 2014 9:46 PM, "andrew touchet" <adt...@latech.edu> wrote: > >> Hi Fireflyhoo, >> >> Below I follow the symbolic links for the jdk-7u21. These links are >> changed accordingly as I change between versions. Also, I have 8 datanodes >> and 2 other various servers that are capable of mounting /hdfs. So it is >> just this server is an issue. >> >> $ java -version >> java version "1.7.0_21" >> Java(TM) SE Runtime Environment (build 1.7.0_21-b11) >> Java HotSpot(TM) 64-Bit Server VM (build 23.21-b01, mixed mode) >> >> java >> $ ls -l `which java` >> *lrwxrwxrwx 1 root root 26 Jul 17 19:50 /usr/bin/java -> >> /usr/java/default/bin/java* >> $ ls -l /usr/java/default >> *lrwxrwxrwx 1 root root 16 Jul 17 19:50 /usr/java/default -> >> /usr/java/latest* >> $ ls -l /usr/java/latest >> *lrwxrwxrwx 1 root root 21 Jul 17 20:29 /usr/java/latest -> >> /usr/java/jdk1.7.0_21* >> >> jar >> $ ls -l `which jar` >> *lrwxrwxrwx 1 root root 21 Jul 17 20:18 /usr/bin/jar -> >> /etc/alternatives/jar* >> $ ls -l /etc/alternatives/jar >> *lrwxrwxrwx 1 root root 29 Jul 17 20:26 /etc/alternatives/jar -> >> /usr/java/jdk1.7.0_21/bin/jar* >> >> javac >> $ ls -l `which javac` >> *lrwxrwxrwx 1 root root 23 Jul 17 20:18 /usr/bin/javac -> >> /etc/alternatives/javac* >> $ ls -l /etc/alternatives/javac >> *lrwxrwxrwx 1 root root 31 Jul 17 20:26 /etc/alternatives/javac -> >> /usr/java/jdk1.7.0_21/bin/javac* >> >> Now that I've tried version from 6 & 7, I'm really not sure what is >> causing this issue. >> >> >> >> >> >> >> On Thu, Jul 17, 2014 at 8:21 PM, firefly...@gmail.com < >> firefly...@gmail.com> wrote: >> >>> I think you first confirm you local java version , >>> Some liux will pre-installed java ,that version is very low >>> >>> ------------------------------ >>> firefly...@gmail.com >>> >>> >>> *From:* andrew touchet <adt...@latech.edu> >>> *Date:* 2014-07-18 09:06 >>> *To:* user <user@hadoop.apache.org> >>> *Subject:* Re: HDFS input/output error - fuse mount >>> 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 <chris.maw...@gmail.com> >>> wrote: >>> >>>> 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 >>>>> >>>>> >>>>> >>>>> >>>>> >>> >>
