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Re: HConnectionImplementation closed
Can anyone tell me when this exception is thrown?


Am 06.01.2013 12:35, schrieb [EMAIL PROTECTED]:
> Hi there,
> I'm having problems accessing HBase from within a MapReduce programme
> on my cluster. To locate the problem I've written a very simple test
> programme. It runs fine on the master node, however on the other nodes
> I get the same error that was causing problems in the MapReduce
> programme:
> java.io.IOException:
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation@2937d090
> closed
>     at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:794)
>     at
> org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.locateRegion(HConnectionManager.java:782)
>     at org.apache.hadoop.hbase.client.HTable.finishSetup(HTable.java:251)
>     at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:215)
>     at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:173)
>     at TestHBase.main(TestHBase.java:29)
> This occurs after these lines in the programme:
>         Configuration conf = HBaseConfiguration.create();
>         conf.set("hbase.master", args[0]);
>         HTable table = new HTable(conf, "Table1");
> Note: I'm note accessing HBase through the InputFormat. I simply would
> like to read out a few values in the setup-method of my mappers. hbase
> shell seems to be working on all nodes just fine and I can ping and
> telnet the master node on port 60000 from the other nodes.
> What could be the problem? Am i missing something? I've installed
> HBase with cloudera manager CDH4.
> Kind regards,
> Antony