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[HADOOP-10597] Evaluate if we can have RPC client back off when server is under heavy load - Hadoop - [issue]
...Currently if an application hits NN too hard, RPC requests be in blocking state, assuming OS connection doesn't run out. Alternatively RPC or NN can throw some well defined exception back to...
http://issues.apache.org/jira/browse/HADOOP-10597    Author: Ming Ma, 2014-10-15, 05:32
[HADOOP-11000] HAServiceProtocol's health state is incorrectly transitioned to SERVICE_NOT_RESPONDING - Hadoop - [issue]
...When HAServiceProtocol.monitorHealth throws a HealthCheckFailedException, the actual exception from protocol buffer RPC is a RemoteException that wraps the real exception. Thus the state is ...
http://issues.apache.org/jira/browse/HADOOP-11000    Author: Ming Ma, 2014-08-26, 12:38
[HADOOP-10673] Update rpc metrics when the call throws an exception - Hadoop - [issue]
...Currently RPC metrics isn't updated when the call throws an exception. We can either update the existing metrics or have a new set of metrics in the case of exception....
http://issues.apache.org/jira/browse/HADOOP-10673    Author: Ming Ma, 2014-07-16, 14:50
[HADOOP-10657] Have RetryInvocationHandler log failover attempt at INFO level - Hadoop - [issue]
...RetryInovcationHandler uses worthLogging flag to decide if it will do logging. worthLogging will be false for first fails over given invocationFailoverCount is zero. That addresses the log n...
http://issues.apache.org/jira/browse/HADOOP-10657    Author: Ming Ma, 2014-06-17, 16:23
[HADOOP-10599] Support prioritization of DN RPCs over client RPCs - Hadoop - [issue]
...We might need to prioritize DN RPC over client RPC so that no matter what application do to NN RPC and FSNamesystem's global lock, DN's requests will be processed timely. After a cluster is ...
http://issues.apache.org/jira/browse/HADOOP-10599    Author: Ming Ma, 2014-05-13, 14:57
[HADOOP-10598] Support configurable RPC fair share - Hadoop - [issue]
...It will be useful if we can support RPC min fair share on a per user or group basis. That will be useful for SLA jobs in a shared cluster. It will be complementary to the history-based soft ...
http://issues.apache.org/jira/browse/HADOOP-10598    Author: Ming Ma, 2014-05-13, 05:00
[HADOOP-10106] Incorrect thread name in RPC log messages - Hadoop - [issue]
...INFO org.apache.hadoop.ipc.Server: IPC Server listener on 8020: readAndProcess from client threw exception org.apache.hadoop.ipc.RpcServerException: Unknown out of band call #-...
http://issues.apache.org/jira/browse/HADOOP-10106    Author: Ming Ma, 2014-02-24, 20:58
[HADOOP-10125] no need to process RPC request if the client connection has been dropped - Hadoop - [issue]
...If the client has dropped the connection before the RPC is processed, RPC server doesn't need to process the RPC call. We have encountered issues where bad applications can bring down the NN...
http://issues.apache.org/jira/browse/HADOOP-10125    Author: Ming Ma, 2014-01-17, 13:28
[HADOOP-10157] move doRead method from IPC Listener class to IPC Reader class - Hadoop - [issue]
...Current doRead method belongs to Listener class. Semantically it is better to move doRead method from Listener class to Reader class....
http://issues.apache.org/jira/browse/HADOOP-10157    Author: Ming Ma, 2013-12-10, 14:55
[HADOOP-8706] Provide rate metrics based on counter value - Hadoop - [issue]
...In production clusters, it is more useful to have ops / sec instead of increasing counter value. Take NameNodeMetrics.getBlockLocations as an example, its current type is MutableCounterLong ...
http://issues.apache.org/jira/browse/HADOOP-8706    Author: Ming Ma, 2012-08-17, 15:28
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