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Posted to common-user@hadoop.apache.org by Sanjay Singh <ss...@yahoo.com> on 2006/09/11 04:55:24 UTC

mapred.JobTracker : Connection refused

Hi,

     My nutch 0.8 intallation is 1 week old and has
been pretty stable. Today I was doing some
house-keeping, removing directories etc. Then I run
the stop-all/start-all and I see this exception in the
hadoop-nutch-jobtracker-data.log. It is constantly
spewing out this exception, and I have a broken system
:(

     I have tried applying the Lease patch
(DFSClient.java	(revision 423872)
) and have also upgraded to 0.4.1 with no solution.


======================================================

2006-09-10 19:40:13,483 WARN  mapred.JobTracker
(JobTracker.java:startTracker(68)) - Starting tracker
java.net.ConnectException: Connection refused
        at
java.net.PlainSocketImpl.socketConnect(Native Method)
        at
java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
        at
java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
        at
java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
        at
java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
        at java.net.Socket.connect(Socket.java:507)
        at java.net.Socket.connect(Socket.java:457)
        at java.net.Socket.<init>(Socket.java:365)
        at java.net.Socket.<init>(Socket.java:207)
        at
org.apache.hadoop.ipc.Client$Connection.<init>(Client.java:113)
        at
org.apache.hadoop.ipc.Client.getConnection(Client.java:359)
        at
org.apache.hadoop.ipc.Client.call(Client.java:297)
        at
org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:150)
        at org.apache.hadoop.dfs.$Proxy0.isDir(Unknown
Source)
        at
org.apache.hadoop.dfs.DFSClient.isDirectory(DFSClient.java:325)
        at
org.apache.hadoop.dfs.DistributedFileSystem.isDirectory(DistributedFileSystem.java:135)
        at
org.apache.hadoop.fs.FileSystem.delete(FileSystem.java:414)
        at
org.apache.hadoop.mapred.JobTracker.<init>(JobTracker.java:430)
        at
org.apache.hadoop.mapred.JobTracker.startTracker(JobTracker.java:65)
        at
org.apache.hadoop.mapred.JobTracker.main(JobTracker.java:1133)


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Re: mapred.JobTracker : Connection refused

Posted by Dennis Kubes <nu...@dragonflymc.com>.
One of the servers probably didn't shut down completely.  You would need 
to check each of your nodes like this:

ps -ef | grep java

See if any of the servers are running.  If they are they can be killed 
manually like this where you put in the process_id

kill -9 process_id

Dennis

Sanjay Singh wrote:
> Hi,
>
>      My nutch 0.8 intallation is 1 week old and has
> been pretty stable. Today I was doing some
> house-keeping, removing directories etc. Then I run
> the stop-all/start-all and I see this exception in the
> hadoop-nutch-jobtracker-data.log. It is constantly
> spewing out this exception, and I have a broken system
> :(
>
>      I have tried applying the Lease patch
> (DFSClient.java	(revision 423872)
> ) and have also upgraded to 0.4.1 with no solution.
>
>
> ======================================================
>
> 2006-09-10 19:40:13,483 WARN  mapred.JobTracker
> (JobTracker.java:startTracker(68)) - Starting tracker
> java.net.ConnectException: Connection refused
>         at
> java.net.PlainSocketImpl.socketConnect(Native Method)
>         at
> java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
>         at
> java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
>         at
> java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
>         at
> java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
>         at java.net.Socket.connect(Socket.java:507)
>         at java.net.Socket.connect(Socket.java:457)
>         at java.net.Socket.<init>(Socket.java:365)
>         at java.net.Socket.<init>(Socket.java:207)
>         at
> org.apache.hadoop.ipc.Client$Connection.<init>(Client.java:113)
>         at
> org.apache.hadoop.ipc.Client.getConnection(Client.java:359)
>         at
> org.apache.hadoop.ipc.Client.call(Client.java:297)
>         at
> org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:150)
>         at org.apache.hadoop.dfs.$Proxy0.isDir(Unknown
> Source)
>         at
> org.apache.hadoop.dfs.DFSClient.isDirectory(DFSClient.java:325)
>         at
> org.apache.hadoop.dfs.DistributedFileSystem.isDirectory(DistributedFileSystem.java:135)
>         at
> org.apache.hadoop.fs.FileSystem.delete(FileSystem.java:414)
>         at
> org.apache.hadoop.mapred.JobTracker.<init>(JobTracker.java:430)
>         at
> org.apache.hadoop.mapred.JobTracker.startTracker(JobTracker.java:65)
>         at
> org.apache.hadoop.mapred.JobTracker.main(JobTracker.java:1133)
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com 
>