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[HADOOP-10233] RPC lacks output flow control
...The RPC layer has input flow control via the callq, however it lacks any output flow control. A handler will try to directly send the response. If the full response is not sent t...
, 2014-01-14, 23:48
[HADOOP-10173] Remove UGI from DIGEST-MD5 SASL server creation
...Instantiation of SASL server instances within the readers threads is performed within a UGI.getCurrentUser().doAs. getCurrentUser is synchronized, and doAs also degrades performance. &...
, 2014-01-03, 14:47
[HADOOP-10172] Cache SASL server factories
...Performance for SASL server creation is atrocious. Sasl.createSaslServer does not cache the provider resolution for the factories. Factory resolution and server instantiation has...
, 2013-12-20, 15:09
[HADOOP-10174] Run RPC server within the Subject that instantiated it
...RPC servers would not require as many doAs blocks if the server threads run within the access control context that instantiates the server....
, 2013-12-17, 19:24
[HADOOP-10099] Reduce chance for RPC denial of service
...A RPC server may accept an unlimited number of connections unless indirectly bounded by a blocking operation in the RPC handler threads. The NN's namespace locking happens to cause thi...
, 2013-11-14, 19:28
[HADOOP-9021] Enforce configured SASL method on the server
...The RPC needs to restrict itself to only using the configured SASL method....
, 2013-09-29, 03:17
[HADOOP-9953] Improve RPC server throughput
...Bottlenecks in the RPC layer are in part holding back the performance of the NN. Even under very heavy load, the NN usually can't saturate more than a few cores even with load patterns...
, 2013-09-20, 16:19
[HADOOP-9930] Desync AbstractDelegationTokenSecretManager
...The ADTSM is heavily synchronized. The result is that verifying, creating, renewing, and canceling tokens are all unnecessarily serialized. The only operations should be serializ...
, 2013-09-06, 17:48
[HADOOP-9850] RPC kerberos errors don't trigger relogin
...Hadoop auto-renews a ticket cache TGT. However, a TGT acquired via keytab is just allowed to expire. To compensate, any exception during a kerberos RPC connection triggers a relo...
, 2013-08-10, 12:33
[HADOOP-9816] RPC Sasl QOP is broken
...HADOOP-9421 broke the handling of SASL wrapping for RPC QOP integrity and privacy options....
, 2013-08-06, 15:24
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