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[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-11310] Reduce the performance impact of the balancer (trunk port)
...HDFS-7967 introduced a highly performant balancer getBlocks() query that scales to large/dense clusters. The simple design implementation depends on the triplets data structure. ...
, 2017-01-20, 00:06
[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
[HDFS-6763] Initialize file system-wide quota once on transitioning to active
...FSImage#loadEdits calls updateCountForQuota to recalculate & verify quotas for the entire namespace. A standby NN using shared edits calls this method every minute. The stand...
, 2016-12-16, 13:10
[HDFS-10673] Optimize FSPermissionChecker's internal path usage
...The INodeAttributeProvider and AccessControlEnforcer features degrade performance and generate excessive garbage even when neither is used. Main issues: A byte of components is unn...
, 2016-11-18, 01:21
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