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From "Klaus Nagel" <...@gibtsdochgar.net>
Subject fuse_dfs dfs problem
Date Wed, 13 Jan 2010 04:23:11 GMT
Hello, I am using Hadoop 0.20.1 and have a litte problem with it...hope
someone can help...

I have a 3 Node Setup, and set dfs.replication and dfs.replication.max to
1 (in the file hdfs-site.xml).
That works great when putting a file to the hadoop filesystem
(eg. ./hadoop fs -put ~/debian-503-i386-businesscard.iso abc.iso)

when I try that with fuse_dfs I get the following error message from the
fuse_dfs_wrapper.sh script

LOOKUP /temp/test.test
   unique: 21, error: -2 (No such file or directory), outsize: 16
unique: 22, opcode: CREATE (35), nodeid: 7, insize: 58
WARN: hdfs does not truly support O_CREATE && O_EXCL
Exception in thread "Thread-6" org.apache.hadoop.ipc.RemoteException:
java.io.IOException: failed to create file /temp/test.test on client
10.8.0.1.
Requested replication 3 exceeds maximum 1
        at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFileInternal(FSNamesystem.java:1074)
        at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFile(FSNamesystem.java:977)
        at
org.apache.hadoop.hdfs.server.namenode.NameNode.create(NameNode.java:377)
  ...
...
...


...same messages in the namenode-log
2010-01-13 04:36:57,183 WARN org.apache.hadoop.hdfs.StateChange: DIR*
NameSystem.startFile: failed to create file /temp/test.test on client
10.8.0.1.
Requested replication 3 exceeds maximum 1
2010-01-13 04:36:57,183 INFO org.apache.hadoop.ipc.Server: IPC Server
handler 4 on 9000, call create(/temp/test.test, rwxr-xr-x,
DFSClient_814881830$
Requested replication 3 exceeds maximum 1
java.io.IOException: failed to create file /temp/test.test on client
10.8.0.1.
Requested replication 3 exceeds maximum 1
        at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFileInternal(FSNamesystem.java:1074)
        at
org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFile(FSNamesystem.java:977)
        at
org.apache.hadoop.hdfs.server.namenode.NameNode.create(NameNode.java:377)
...
...

...hope someone can help me solving that problem,
best regards: Klaus


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