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Posted to hdfs-dev@hadoop.apache.org by "Amir Langer (JIRA)" <ji...@apache.org> on 2014/01/08 15:17:52 UTC

[jira] [Created] (HDFS-5734) A NN-internal RPC BM service

Amir Langer created HDFS-5734:
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             Summary: A NN-internal RPC BM service
                 Key: HDFS-5734
                 URL: https://issues.apache.org/jira/browse/HDFS-5734
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: namenode
            Reporter: Amir Langer


Separate the BM from NN by running it with with its own thread-pool and RPC protocol but still in the same process as NN.
NN and BM will in interact through some loopback call that will simulate a separate service.
This sprint still assumes a one to one relation between NN and BM and does not split the BM to a separate process, only simulates such a split inside the same VM. This allows us to defer any configuration issue / Testing support / scripts changes to later tasks. 
This task will therefore also not handle any HA issue to the BM itself. It will, however, deal with having BM code actually running in a different thread to the NN code and will handle building the initialisation / lifecycle code to an independent BM.



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