Block reports should be processed offline
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Key: HADOOP-582
URL: http://issues.apache.org/jira/browse/HADOOP-582
Project: Hadoop
Issue Type: Bug
Components: dfs
Affects Versions: 0.7.0
Reporter: Owen O'Malley
Assigned To: Sameer Paranjpye
The namenode's handling of block reports should be done from a batch queue
instead of while the rpc call from the client is waiting. I'd propose:
void blockReport(DataNodeRegistration, Block[]) throws IOException;
instead of passing back obsolete blocks they can be handed back on later
heartbeat.
The blockReport calls should just queue the registration and list of blocks and
there should be a thread that processes the block reports when possible.
The goal is to prevent rpc timeouts and therefore retransmissions of the block
lists.
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