FAQ
Aloha,

We are experimenting with Hadoop and I have setup a basic cluster and
now trying to integrate it into our environment.

Our cluster is up and accessible via the web tools and command line.
However access through FUSE or ftp does not work.

I compiled FUSE without problems but this is the error we are seeing.
We are using Hadoop version 0.20.3

# ./fuse_dfs_wrapper.sh dfs://hadoop0:9000 /mnt1 -d
port=9000,server=hadoop0
fuse-dfs didn't recognize /mnt1,-2
fuse-dfs ignoring option -d
FUSE library version: 2.8.5
nullpath_ok: 0
unique: 1, opcode: INIT (26), nodeid: 0, insize: 56
INIT: 7.13
flags=0x0000007b
max_readahead=0x00020000
INIT: 7.12
flags=0x00000011
max_readahead=0x00020000
max_write=0x00020000
unique: 1, success, outsize: 40

When I try and access the directory I get this:
hadoop@hadoop0:~$ cd /mnt1
-su: cd: /mnt1: Input/output error

And FUSE debug shows this:
unique: 2, opcode: GETATTR (3), nodeid: 1, insize: 56
getattr /
Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/hadoop/conf/Configuration
Caused by: java.lang.ClassNotFoundException:
org.apache.hadoop.conf.Configuration
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:334)
Can't construct instance of class org.apache.hadoop.conf.Configuration
unique: 2, error: -5 (Input/output error), outsize: 16
unique: 3, opcode: GETATTR (3), nodeid: 1, insize: 56

Any help would be greatly appreciated!
Thanks,
Herb

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postedJun 29, '11 at 10:27p
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