Looks like the table name is not in the log statement:
throw new NoServerForRegionException("Unable to find region for "
+ Bytes.toStringBinary(row) + " after " + numTries + " tries.");
We should add tableName to the above log.
>From HTable:
private void finishSetup() throws IOException {
this.connection.locateRegion(tableName, HConstants.EMPTY_START_ROW);
It seems tableName couldn't be retrieved from hbase.meta
Can you show the complete stack trace ?
On Sun, Jan 19, 2014 at 6:59 PM, Rural Hunter <[email protected]> wrote:
> Hi,
>
> I'm using hbase 0.96.1 with hadoop2. I have a client running all the time.
> It connects to hbase when it receives data from time to time. The logic of
> this client is like this:
> 1. It keeps the HConnection got from HConnectionManager.createConnection()
> when the client inits.
> 2. It calls getTable from the HConnection kept above to access hbase
> tables from time to time.
>
> There are serveral same clients running on several server. From one time
> point, On only one of the server, the client started to experience the
> NoServerForRegionException:
> org.apache.hadoop.hbase.client.NoServerForRegionException: Unable to find
> region for after 3 tries.
> at org.apache.hadoop.hbase.client.HConnectionManager$
> HConnectionImplementation.locateRegionInMeta(HConnectionManager.java:1127)
> at org.apache.hadoop.hbase.client.HConnectionManager$
> HConnectionImplementation.locateRegion(HConnectionManager.java:1047)
> at org.apache.hadoop.hbase.client.HConnectionManager$
> HConnectionImplementation.locateRegion(HConnectionManager.java:1004)
> at org.apache.hadoop.hbase.client.HTable.finishSetup(HTable.java:325)
> at org.apache.hadoop.hbase.client.HTable.<init>(HTable.java:309)
> at org.apache.hadoop.hbase.client.HConnectionManager$
> HConnectionImplementation.getTable(HConnectionManager.java:706)
> at org.apache.hadoop.hbase.client.HConnectionManager$
> HConnectionImplementation.getTable(HConnectionManager.java:688)
> at org.apache.hadoop.hbase.client.HConnectionManager$
> HConnectionImplementation.getTable(HConnectionManager.java:678)
>
> Note the table name and rowkey after 'Unable to find region for' is empty.
> I checked the code in the client and it can never pass an empty table name
> to getTable. I also checked the master and zookeeper log but didn't find
> any error related to this. As far as I know, there could be some
> intermittent network problem between the client and the hbase server. What
> can be the cause for the error and how can I avoid/fix it?
>
