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[HDFS-7990] IBR delete ack should not be delayed
...HDFS-395 added the incremental BR feature. A concern was avoiding a race condition with ack-ing block invalidates followed by the directory scanner re-adding the block before the async...
, 2017-05-18, 07:39
[HDFS-8492] DN should notify NN when client requests a missing block
...If the DN has a block its volume map but not on-disk, it tells clients it's an invalid block id. The NN is not informed of the missing block until either the bp slice scanner or the di...
, 2017-04-27, 14:05
[HDFS-4389] Non-HA DFSClients do not attempt reconnects
...The HA retry policy implementation appears to have broken non-HA DFSClient connect retries. The ipc Client.Connection#handleConnectionFailure used to perform 45 connection attempts, bu...
, 2017-03-31, 05:48
[HDFS-4493] webhdfs fails after SPNEGO token expires
...Webhdfs assumes that SPNEGO's AuthenticationException is always fatal. The exception is thrown if authentication truly fails due to bad credentials, but it's also thrown when the auth ...
, 2017-03-31, 05:33
[HDFS-10326] Disable setting tcp socket send/receive buffers for write pipelines
...The DataStreamer and the Datanode use a hardcoded DEFAULT_DATA_SOCKET_SIZE=128K for the send and receive buffers of a write pipeline. Explicitly setting tcp buffer sizes disables tcp s...
, 2017-03-29, 20:38
[HDFS-7967] Reduce the performance impact of the balancer
...The balancer needs to query for blocks to move from overly full DNs. The block lookup is extremely inefficient. An iterator of the node's blocks is created from the iterators of ...
, 2017-03-28, 00:22
[HDFS-11379] DFSInputStream may infinite loop requesting block locations
...DFSInputStream creation caches file size and initial range of locations. If the file is truncated (or replaced) and the client attempts to read outside the initial range, the client go...
, 2017-02-17, 23:41
[HDFS-8776] Decom manager should not be active on standby
...The decommission manager should not be actively processing on the standby.The decomm manager goes through the costly computation for determining every block on the node requires replication ...
, 2017-01-06, 22:05
[HDFS-10656] Optimize conversion of byte arrays back to path string
...DFSUtil.byteArray2PathString generates excessive object allocation. each byte array is encoded to a string (copy) string appended to a builder which extracts the chars from the intermediate ...
, 2017-01-06, 08:06
[HDFS-9287] Block placement completely fails if too many nodes are decommissioning
...The DatanodeManager coordinates with the HeartbeatManager to update HeartbeatManager.Stats to track capacity and load. This is crucial for block placement to consider space and load. ...
, 2017-01-05, 01:24
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