Arun C Murthy
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[HADOOP-9749] Remove synchronization for UGI.getCurrentUser
...HADOOP-7854 added synchronization to getCurrentUser due to ConcurrentModificationExceptions. This degrades NN call handler performance.The problem was not well understood at the time, ...
, 2017-03-27, 17:53
[HADOOP-9856] Avoid Krb5LoginModule.logout issue
...The kerberos login module's logout method arguably has a bug. Subject#getPrivateCredentials() returns a synchronized set. Iterating the set requires explicitly locking the set. &...
, 2017-01-07, 01:57
[HADOOP-9238] FsShell -put from stdin auto-creates paths
...FsShell put is no longer supposed to auto-create paths. There's an inconsistency where a put from stdin will still auto-create paths....
, 2017-01-07, 01:57
[HADOOP-13438] Optimize IPC server protobuf decoding
...The current use of the protobuf API uses an expensive code path. The builder uses the parser to instantiate a message, then copies the message into the builder. The parser is cre...
, 2017-01-06, 23:51
[HADOOP-12483] Maintain wrapped SASL ordering for postponed IPC responses
...A SASL encryption algorithm (wrapping) may have a required ordering for encrypted responses. The IPC layer encrypts when the response is set based on the assumption it is being immedia...
, 2016-11-02, 05:59
[HADOOP-10300] Allowed deferred sending of call responses
...RPC handlers currently do not return until the RPC call completes and response is sent, or a partially sent response has been queued for the responder. It would be useful for a proxy m...
, 2016-11-02, 05:25
[HADOOP-11780] Prevent IPC reader thread death
...Reader threads can die to a race condition with the responder thread. If the server's ipc handler cannot send a response in one write, it delegates sending the rest of the response to ...
, 2016-10-05, 13:13
[HADOOP-13537] Support external calls in the RPC call queue
...Leveraging HADOOP-13465 will allow non-rpc calls to be added to the call queue. This is intended to support routing webhdfs calls through the call queue to provide a unified and protoc...
, 2016-09-29, 20:57
[HADOOP-13425] IPC layer optimizations
...Umbrella jira for y! optimizations to reduce object allocations, more efficiently use protobuf APIs, unified ipc and webhdfs callq to enable QoS, etc....
, 2016-09-09, 22:31
[HADOOP-10940] RPC client does no bounds checking of responses
...The rpc client does no bounds checking of server responses. In the case of communicating with an older and incompatible RPC, this may lead to OOM issues and leaking of resources....
, 2016-09-09, 15:59
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