Arun C Murthy
Vinod Kumar Vavilapalli
Brahma Reddy Battula
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[HADOOP-9747] Reduce unnecessary UGI synchronization
...Jstacks of heavily loaded NNs show up to dozens of threads blocking in the UGI....
, 2018-01-12, 23:52
[HADOOP-12861] RPC client fails too quickly when server connection limit is reached
...The NN's rpc server immediately closes new client connections when a connection limit is reached. The client rapidly retries a small number of times with no delay which causes clients to fai...
, 2017-12-15, 20:21
[HADOOP-9161] FileSystem.moveFromLocalFile fails to remove source
...FileSystem.moveFromLocalFile fails with cannot remove file:/path after copying the files. It appears to be trying to remove a file uri as a relative path....
, 2017-11-03, 15:50
[HADOOP-14912] FairCallQueue may defer servicing calls
...HADOOP-14033 switched a lock to a semaphore to allow concurrency for producers & consumers to the underlying queues. A race condition was created that may cause a consumer to acqui...
, 2017-10-10, 20:26
[HADOOP-13052] ChecksumFileSystem mishandles crc file permissions
...CheckFileSystem does not override permission related calls to apply those operations to the hidden crc files. Clients may be unable to read the crcs if the file is created with strict ...
, 2017-10-10, 14:39
[HADOOP-9363] AuthenticatedURL will NPE if server closes connection
...A NPE occurs if the server unexpectedly closes the connection for an AuthenticatedURL w/o sending a response....
, 2017-09-29, 20:50
[HADOOP-14033] Reduce fair call queue lock contention
...Under heavy load the call queue may run dry yet clients experience high latency.The fcq requires producers and consumers to sync via a shared lock. Polling consumers hold the lock whil...
, 2017-09-27, 21:18
[HADOOP-13442] Optimize UGI group lookups
...UGI#getGroups and its usage is inefficient. The list is unnecessarily converted to multiple collections.For every invocation, the List<String> from the group provider is converte...
, 2017-09-08, 18:31
[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 ...
, 2017-09-01, 00:42
[HADOOP-14687] AuthenticatedURL will reuse bad/expired session cookies
...AuthenticatedURL with kerberos was designed to perform spnego, then use a session cookie to avoid renegotiation overhead. Unfortunately the client will continue to use a cookie after i...
, 2017-08-22, 22:43
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