hadoop-common-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From andrew touchet <adt...@latech.edu>
Subject HDFS input/output error - fuse mount
Date Thu, 17 Jul 2014 23:49:51 GMT
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 -dunique: 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: 16unique: 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

Mime
View raw message