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[HDFS-10564] UNDER MIN REPL'D BLOCKS should be prioritized for replication
...When datanodes get drained they are probably being drained because the hardware is bad, or suspect. The blocks that have no live nodes should be prioritized. However it appears not to be the...
, 2016-07-12, 20:52
[HDFS-9906] Remove spammy log spew when a datanode is restarted
...WARN BlockStateChange: BLOCK* addStoredBlock: Redundant addStoredBlock request received for blk_1109897077_36157149 on node 192.168.1.1:50010 size 268435456This happens waaaay too much to ad...
, 2016-06-15, 17:03
[HDFS-9859] Backport HDFS-6440 to branch-2
...HDFS-6440 is a very interesting feature for people who want to run HDFS in an environment where machines have to join and leave a cluster. Until 3.0 is close we should encourage that...
, 2016-06-03, 17:11
[HDFS-9669] TcpPeerServer should respect ipc.server.listen.queue.size
...On periods of high traffic we are seeing:16/01/19 23:40:40 WARN hdfs.DFSClient: Connection failure: Failed to connect to /10.138.178.47:50010 for file /MYPATH/MYFILE for block BP-1935559084-...
, 2016-02-11, 19:03
Re: Erasure coding in branch-2 [Was Re: [VOTE] Merge HDFS-7285 (erasure coding) branch to trunk]
- [mail # dev]
...I don't really see the difference between 2.9 with a ton of scary changes(EC is a lot more NN stuff than a usual release) and a 3.0.What's the downside of getting a major version. It relaxes...
, 2015-11-05, 00:17
[HDFS-9087] Add some jitter to DataNode.checkDiskErrorThread
...If all datanodes are started across a cluster at the same time (or errors in the network cause ioexceptions) there can be storms where lots of datanodes check their disks at the exact same t...
, 2015-10-28, 17:34
Re: [DISCUSS] About the details of JDK-8 support
- [mail # dev]
...On Mon, Oct 5, 2015 at 5:35 PM, Tsuyoshi Ozawa wrote:We've been running JDK 8u60 in production with Hadoop 2.6.X and HBase forquite a while. Everything has been very stable for us. We'...
, 2015-10-07, 21:39
[HDFS-5274] Add Tracing to HDFS
...Since Google's Dapper paper has shown the benefits of tracing for a large distributed system, it seems like a good time to add tracing to HDFS. HBase has added tracing using HTrace. &n...
, 2015-08-11, 18:05
- [mail # dev]
...Is there anyone that's available to reviewhttps://issues.apache.org/jira/browse/HDFS-8078Patch has been up for a while and got a clean +1 on QA.Has been deployed on a real cluster. ...
, 2015-05-16, 21:03
[HDFS-4670] Style Hadoop HDFS web ui's with Twitter's bootstrap.
...A users' first experience of Apache Hadoop is often looking at the web ui. This should give the user confidence that the project is usable and relatively current....
, 2014-05-02, 00:04
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