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Posted to general@hadoop.apache.org by George Pang <p0...@gmail.com> on 2009/05/19 23:49:22 UTC
DFS Access Error
Dear Users,
When I tried to access the DFS, an error message apears:
Error: java.io.IOException: Unknown protocol to job tracker:
org.apache.hadoop.dfs.ClientProtocol
at
org.apache.hadoop.mapred.jobTracker.getProtocolVersion(JobTracker.java:163)
at sun.reflec.NativeMethodAccessorimpl.invoke0(Native Method)
at
sun.reflec.NativeMethodAccessorimpl.invoke0(NativeMethodAccessorimpl.java:39)
at
sun.reflec.NativeMethodAccessorimpl.invoke0(DelegatingMethodAccessorimpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:481)
at org.apache.hadoop.ipc.Server$Handler.run(Server:java:890)
Hadoop version: 0.18.3
I'd appreciate your opinion!
George
Re: DFS Access Error
Posted by George Pang <p0...@gmail.com>.
I made a mistake on misplacing the port no. for MR master with HDFS master.
After correcting that, it works.
George
2009/5/19 George Pang <p0...@gmail.com>
> Dear Users,
>
> When I tried to access the DFS, an error message apears:
>
> Error: java.io.IOException: Unknown protocol to job tracker:
> org.apache.hadoop.dfs.ClientProtocol
> at
> org.apache.hadoop.mapred.jobTracker.getProtocolVersion(JobTracker.java:163)
> at sun.reflec.NativeMethodAccessorimpl.invoke0(Native Method)
> at
> sun.reflec.NativeMethodAccessorimpl.invoke0(NativeMethodAccessorimpl.java:39)
> at
> sun.reflec.NativeMethodAccessorimpl.invoke0(DelegatingMethodAccessorimpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:481)
> at org.apache.hadoop.ipc.Server$Handler.run(Server:java:890)
>
> Hadoop version: 0.18.3
>
> I'd appreciate your opinion!
>
> George
>
Re: DFS Access Error
Posted by George Pang <p0...@gmail.com>.
I made a mistake on misplacing the port no. for MR master with HDFS master.
After correcting that, it works.
George
2009/5/19 George Pang <p0...@gmail.com>
> Dear Users,
>
> When I tried to access the DFS, an error message apears:
>
> Error: java.io.IOException: Unknown protocol to job tracker:
> org.apache.hadoop.dfs.ClientProtocol
> at
> org.apache.hadoop.mapred.jobTracker.getProtocolVersion(JobTracker.java:163)
> at sun.reflec.NativeMethodAccessorimpl.invoke0(Native Method)
> at
> sun.reflec.NativeMethodAccessorimpl.invoke0(NativeMethodAccessorimpl.java:39)
> at
> sun.reflec.NativeMethodAccessorimpl.invoke0(DelegatingMethodAccessorimpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:481)
> at org.apache.hadoop.ipc.Server$Handler.run(Server:java:890)
>
> Hadoop version: 0.18.3
>
> I'd appreciate your opinion!
>
> George
>