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Colin Patrick McCabe
Tsz Wo Nicholas Sze
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[HDFS-8991] Provide information on BPOfferService in DN JMX
...In cases like HDFS-7714 where the BPOfferService thread is missing, which require nontrivial effort to debug that which NN that the DN thinks it active / standby.It would make sense to make ...
, 2016-07-13, 20:24
[HDFS-8314] Move HdfsServerConstants#IO_FILE_BUFFER_SIZE and SMALL_BUFFER_SIZE to the users
...Currently HdfsServerConstants reads the configuration and to set the value of IO_FILE_BUFFER_SIZE and SMALL_BUFFER_SIZE, thus they are configurable instead of being constants.This jira propo...
, 2016-07-11, 21:27
[HDFS-8803] Move DfsClientConf to hdfs-client
...This jira tracks the effort of moving the DfsClientConf class into the hdfs-client module....
, 2016-06-24, 22:35
[HDFS-8008] Support client-side back off when the datanodes are congested
...HDFS-7270 introduces the mechanism for DataNode to signal congestions. DFSClient should be able to recognize the signals and back off....
, 2016-05-24, 06:42
[HDFS-6187] Update the document of hftp/hsftp in branch-2 to mention that they are deprecated
...HDFS-5570 has removed hftp / hsftp from trunk. The documentation of hftp / hsftp in branch-2 need to be updated to indicate that these two filesystems are deprecated in 2.x and will be unava...
, 2016-05-10, 16:35
[HDFS-8782] Upgrade to block ID-based DN storage layout delays DN registration
...We have seen multiple incidents at production sites that there are long delays for DNs to register to the NN when upgrading to post 2.6 release.Further investigation shows that the DN is blo...
, 2016-03-31, 10:05
[HDFS-7060] Avoid taking locks when sending heartbeats from the DataNode
...We're seeing the heartbeat is blocked by the monitor of FsDatasetImpl when the DN is under heavy load of writes: java.lang.Thread.State: BLOCKED (on object monitor) ...
, 2016-03-29, 05:28
[HDFS-9129] Move the safemode block count into BlockManager
...The SafeMode needs to track whether there are enough blocks so that the NN can get out of the safemode. These fields can moved to the BlockManager class....
, 2016-03-22, 12:30
[HDFS-10184] Introduce unit tests framework for HDFS UI
...The current HDFS UI is based on HTML5 and it does not have unit tests yet. Occasionally things break and we can't catch it. We should investigate and introduce unit test frameworks such as M...
, 2016-03-22, 10:14
[HDFS-9048] DistCp documentation is out-of-dated
...There are a couple issues with the current distcp document: It recommends hftp / hsftp filesystem to copy data between different hadoop version. hftp / hsftp have been deprecated in the flav...
, 2016-03-03, 10:14
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