Hi All,
We are using 0.94.15 in our Opendaylight/TSDR project currently.
We observed put operation hanged for 20 mins (with all default timeouts) and
then throws an IOException. Even when we re-attempt the same put operation, it
hangs for 20 mins again. We observed there is an zxid mismatch on hbase server
logs.
We wanted to get clarified for the following items.
1) Reducing this hanging time from 20 mins to 5 mins: Looks there are many
timeout configuration (hbase-client, zookeeper, client.pause etc) and it
slightly confusing how they are all calculated with backoff series. If I add
the configuration hbase.client.retries.number=3 in hbase-site.xml will bring
down it to 5 mins?
2) When we receive this exception, we deletedAllConnections and subsequent
put operation succeeded. We wish to continue this approach. Following is our
code where we create HTable.
HTableInterface htableResult = null;
htableResult = htableMap.get(tableName);
..
if (htableResult == null) {
if (htablePool == null || htablePool.getTable(tableName) ==
null) {
htablePool = new HTablePool(getConfiguration(), poolSize);
}
if ( htablePool != null){
htableResult = htablePool.getTable(tableName);
..
}
}
htableMap.put(tableName, htableResult);
We create 5 tables in our application. Will there be 5 HConnection totally and
each HConnection for each Table? If yes, how do I delete a connection for the
given table as most of the delete(All)Connections in HConnectionManager are
deprecated in 0.94.15. No alternatives given in the java doc. Even if we use
deleteConnection, it asks for conf which doesn't bind to any table, correct?
deleteConnection
@Deprecated
public static void deleteConnection(org.apache.hadoop.conf.Configuration conf)
Deprecated.
Delete connection information for the instance specified by configuration. If
there are no more references to it, this will then close connection to the
zookeeper ensemble and let go of all resources.
Parameters:
conf - configuration whose identity is used to find HConnection instance.
deleteAllConnections
@Deprecated
public static void deleteAllConnections(boolean stopProxy)
Deprecated. use deleteAllConnections() instead
Delete information for all connections.
Parameters:
stopProxy - No longer used. This parameter is ignored.
deleteAllConnections
@Deprecated
public static void deleteAllConnections()
Deprecated.
Delete information for all connections.
Throws:
IOException
Thanks,
Hari
