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[HDFS-12173] MiniDFSCluster cannot reliably use NameNode#stop
...Sporadic test failures occur because NameNode#stop used by the mini cluster does not properly manage the HA context's state. It directly calls HAState#exitState(context) instead of HAS...
, 2017-07-20, 21:04
[HDFS-12142] Files may be closed before streamer is done
...We're encountering multiple cases of clients calling updateBlockForPipeline on completed blocks. Initial analysis is the client closes a file, completeFile succeeds, then it immediatel...
, 2017-07-14, 16:43
[HDFS-12070] Failed block recovery leaves files open indefinitely and at risk for data loss
...Files will remain open indefinitely if block recovery fails which creates a high risk of data loss. The replication monitor will not replicate these blocks.The NN provides the primary ...
, 2017-07-13, 14:01
[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. ...
, 2017-06-30, 00:49
[HDFS-5239] Allow FSNamesystem lock fairness to be configurable
...The fairness of the FSNamesystem#fsLock is hardcoded to true. Using an unfair lock provides a negligible increase to throughput. However this is due to bottlenecks elsewhere in t...
, 2017-06-15, 05:27
[HDFS-8498] Blocks can be committed with wrong size
...When an IBR for a UC block arrives, the NN updates the expected location's block and replica state only if it's on an unexpected storage for an expected DN. If it's for an expected sto...
, 2017-06-07, 22:59
[HDFS-11648] Lazy construct the IIP pathname
...The IIP pathname is a string constructed from the byte components. If the pathname will never be accessed, ex. processing listStatus children, building the path is unnecessarily ex...
, 2017-06-07, 22:59
[HDFS-10619] Cache path in InodesInPath
...INodesInPath#getPath, a frequently called method, dynamically builds the path. IIP should cache the path upon construction....
, 2017-05-31, 18:46
[HDFS-8674] Improve performance of postponed block scans
...When a standby goes active, it marks all nodes as "stale" which will cause block invalidations for over-replicated blocks to be queued until full block reports are received from the nodes wi...
, 2017-05-27, 02:05
[HDFS-11641] Reduce cost of audit logging by using FileStatus instead of HdfsFileStatus
...Audit logging operations create a HdfsFileStatus but audit logging promptly converts it to a FileStatus to pass to the loggers. A HdfsFileStatus is more expensive to create, ex. multip...
, 2017-05-18, 15:19
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