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[HDFS-11634] Optimize BlockIterator when iterating starts in the middle.
...BlockManager.getBlocksWithLocations() needs to iterate blocks from a randomly selected startBlock index. It creates an iterator which points to the first block and then skips all blocks unti...
, 2017-04-18, 20:20
[HDFS-11313] Segmented Block Reports
...Block reports from a single DataNode can be currently split into multiple RPCs each reporting a single DataNode storage (disk). The reports are still large since disks are getting bigger. Sp...
, 2017-04-12, 19:29
[HDFS-10733] NameNode terminated after full GC thinking QJM is unresponsive.
...NameNode went into full GC while in AsyncLoggerSet.waitForWriteQuorum(). After completing GC it checks if the timeout for quorum is reached. If the GC was long enough the timeout can expire,...
, 2017-01-11, 21:34
[HDFS-11087] NamenodeFsck should check if the output writer is still writable.
...NamenodeFsck keeps running even after the client was interrupted. So if you start fsck / on a large namespace and kill the client, the NameNode will keep traversing the tree for hours althou...
, 2017-01-06, 08:06
[HDFS-5079] Cleaning up NNHAStatusHeartbeat.State DatanodeProtocolProtos.
...NNHAStatusHeartbeat.State was removed from usage by HDFS-4268. The respective class should also be removed from DatanodeProtocolProtos....
, 2016-12-08, 22:28
[HDFS-10712] Fix TestDataNodeVolumeFailure on 2.* branches.
...TestDataNodeVolumeFailure.testVolumeFailure() should pass not null BlockReportContext.This has been fixed on trunk....
, 2016-10-18, 03:48
[HDFS-10301] BlockReport retransmissions may lead to storages falsely being declared zombie if storage report processing happens out of order
...When NameNode is busy a DataNode can timeout sending a block report. Then it sends the block report again. Then NameNode while process these two reports at the same time can interleave proce...
, 2016-10-18, 02:09
[HDFS-10953] Remove single-rpc block reports.
...Currently a DataNode can send block reports as a single RPC for all storages together or as multiple per storage RPCs. The choice is based on the size of the report and is controlled by the ...
, 2016-10-14, 21:31
[HDFS-10866] Fix Eclipse Java 8 compile errors related to generic parameters.
...Compilation with Java 8 in Eclipse returns errors, which are related to the use of generics. This does not effect command line maven builds and is confirmed to be a bug in Eclipse.The fix is...
, 2016-09-23, 21:39
[HDFS-7263] Snapshot read can reveal future bytes for appended files.
...The following sequence of steps will produce extra bytes, that should not be visible, because they are not in the snapshot. Create a file of size L, where L % blockSize != 0. Create a snapsh...
, 2016-09-01, 04:13
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