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HDFS, mail # user - Is it possible to recover name node just using the meta data in a new machine
Jeff Zhang
2010-05-21, 04:35
Todd Lipcon
2010-05-21, 04:39
Jeff Zhang
2010-05-21, 04:50
Todd Lipcon
2010-05-21, 04:58
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Re: Is it possible to recover name node just using the meta data in a new machine
Jeff Zhang 2010-05-21, 05:19
Thanks Todd, I forgot to change dfs.http.address

On Fri, May 21, 2010 at 12:58 PM, Todd Lipcon <[EMAIL PROTECTED]> wrote:
> On Thu, May 20, 2010 at 9:50 PM, Jeff Zhang <[EMAIL PROTECTED]> wrote:
>>
>> Hi Todd,
>>
>> I try the command, but no process is using the port 50070
>>
>
> Double check fs.default.name and dfs.http.address are both pointing to a
> domain name which resolve on that machine to a local IP address. It seems to
> think you're trying to bind to a nonlocal IP.
> -Todd
>
>>
>> On Fri, May 21, 2010 at 12:39 PM, Todd Lipcon <[EMAIL PROTECTED]> wrote:
>> > The new machine apparently has something listening on one of the NN
>> > ports.
>> > try sudo fuser -n tcp 50070
>> > (will tell you which pid is listening on that port)
>> > -Todd
>> >
>> > On Thu, May 20, 2010 at 9:35 PM, Jeff Zhang <[EMAIL PROTECTED]> wrote:
>> >>
>> >> Hi all,
>> >>
>> >> I'd like to recover the name node in another new machine. I copy the
>> >> meta data from the old name node to the new name node, and then modify
>> >> the configuration (including the fs.default.name). Then I stop the old
>> >> dfs cluster, and restart the new dfs cluster on the new machine, then
>> >> I get the following error message ( anyone has any ideas ?)
>> >>
>> >> 2010-05-21 01:02:37,552 INFO org.apache.hadoop.http.HttpServer: Port
>> >> returned by webServer.getConnectors()[0].getLocalPort() before open()
>> >> is -1. Opening the listener on 500702010-05-21 01:02:37,554 WARN
>> >> org.apache.hadoop.hdfs.server.namenode.FSNamesystem:
>> >> ReplicationMonitor thread received
>> >> InterruptedException.java.lang.InterruptedException: sleep
>> >> interrupted2010-05-21 01:02:37,555 INFO
>> >> org.apache.hadoop.hdfs.server.namenode.DecommissionManager:
>> >> Interrupted Monitorjava.lang.InterruptedException: sleep interrupted
>> >>        at java.lang.Thread.sleep(Native Method)
>> >>        at
>> >>
>> >> org.apache.hadoop.hdfs.server.namenode.DecommissionManager$Monitor.run(DecommissionManager.
>> >> java:65)
>> >>        at java.lang.Thread.run(Thread.java:619)
>> >> 2010-05-21 01:02:37,556 INFO
>> >> org.apache.hadoop.hdfs.server.namenode.FSNamesystem: Number of
>> >> transactio
>> >> ns: 0 Total time for transactions(ms): 0Number of transactions batched
>> >> in Syncs: 0 Number of syncs: 0
>> >> SyncTimes(ms): 0 0
>> >> 2010-05-21 01:02:37,565 INFO org.apache.hadoop.ipc.Server: Stopping
>> >> server on 9000
>> >> 2010-05-21 01:02:37,566 ERROR
>> >> org.apache.hadoop.hdfs.server.namenode.NameNode:
>> >> java.net.BindException:
>> >>  Cannot assign requested address
>> >>        at sun.nio.ch.Net.bind(Native Method)
>> >>        at
>> >>
>> >> sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:119)
>> >>        at
>> >> sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59)
>> >>        at
>> >>
>> >> org.mortbay.jetty.nio.SelectChannelConnector.open(SelectChannelConnector.java:216)
>> >>        at org.apache.hadoop.http.HttpServer.start(HttpServer.java:424)
>> >>        at
>> >>
>> >> org.apache.hadoop.hdfs.server.namenode.NameNode.startHttpServer(NameNode.java:246)
>> >>
>> >>
>> >> --
>> >> Best Regards
>> >>
>> >> Jeff Zhang
>> >
>> >
>> >
>> > --
>> > Todd Lipcon
>> > Software Engineer, Cloudera
>> >
>>
>>
>>
>> --
>> Best Regards
>>
>> Jeff Zhang
>
>
>
> --
> Todd Lipcon
> Software Engineer, Cloudera
>

--
Best Regards

Jeff Zhang