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Introducing ConsensusNode and a Coordination Engine - HDFS - [mail # dev]
...Hello hadoop developers,I just opened two jiras proposing to introduce ConsensusNode into HDFS anda Coordination Engine into Hadoop Common. The latter should benefit HDFSand  HBase as w...
   Author: Konstantin Shvachko, 2014-05-29, 21:10
[HDFS-6325] Append should fail if the last block has insufficient number of replicas - HDFS - [issue]
...Currently append() succeeds on a file with the last block that has no replicas. But the subsequent updatePipeline() fails as there are no replicas with the exception "Unable to retrieve bloc...
http://issues.apache.org/jira/browse/HDFS-6325    Author: Konstantin Shvachko, 2014-05-20, 16:37
Re: Re-swizzle 2.3 - HDFS - [mail # dev]
...Sorry for the last minute request.Can we add HDFS-4858 to the release, please?It solves pretty important bug related to failover.I can commit momentarily if there are no objections.Thanks,On...
   Author: Konstantin Shvachko, 2014-02-11, 01:53
[HDFS-4370] Fix typo Blanacer in DataNode - HDFS - [issue]
...It is in JavaDoc of DataNode.getBalancerBandwidth(). Should be Balancer....
http://issues.apache.org/jira/browse/HDFS-4370    Author: Konstantin Shvachko, 2014-02-10, 14:51
[HDFS-5077] NPE in FSNamesystem.commitBlockSynchronization() - HDFS - [issue]
...NN starts a block recovery, which will synchronize block replicas on different DNs. In the end one of DNs will report the list of the nodes containing the consistent replicas to the NN via c...
http://issues.apache.org/jira/browse/HDFS-5077    Author: Konstantin Shvachko, 2014-02-07, 23:08
[expand - 2 more] - Re: NameNode be formated while namenode is running - HDFS - [mail # dev]
...Good point, Uma.  Thanks,   On Tue, Jan 14, 2014 at 7:47 PM, Uma Maheswara Rao G wrote:  ...
   Author: Konstantin Shvachko, 2014-01-15, 20:14
[HDFS-4746] ClassCastException in BlockManager.addStoredBlock() due to that blockReceived came after file was closed. - HDFS - [issue]
...In some cases the last block replica of a file can be reported after the file was closed. In this case file inode is of type INodeFile. BlockManager.addStoredBlock() though expects it to be ...
http://issues.apache.org/jira/browse/HDFS-4746    Author: Konstantin Shvachko, 2013-12-30, 23:19
[HDFS-5068] Convert NNThroughputBenchmark to a Tool to allow generic options. - HDFS - [issue]
...Currently NNThroughputBenchmark does not recognize generic options like -conf, etc. A simple way to enable such functionality is to make it implement Tool interface....
http://issues.apache.org/jira/browse/HDFS-5068    Author: Konstantin Shvachko, 2013-12-29, 21:19
[HDFS-4874] create with OVERWRITE deletes existing file without checking the lease: feature or a bug. - HDFS - [issue]
...create with OVERWRITE flag will remove a file under construction even if the issuing client does not hold a lease on the file.It could be a bug or the feature that applications rely upon....
http://issues.apache.org/jira/browse/HDFS-4874    Author: Konstantin Shvachko, 2013-12-11, 09:57
Re: Deprecate BackupNode - HDFS - [mail # dev]
...I explained my reasoning in the jira https://issues.apache.org/jira/browse/HDFS-4114?focusedCommentId=13841326&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-1...
   Author: Konstantin Shvachko, 2013-12-08, 21:06
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