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[HDFS-293] Remove code related to conversion of name-node and data-node storage directories to the format introduced in hadoop 0.13 - HDFS - [issue]
...Hadoop 0.18 does not support direct HDFS upgrades from versions 0.13 or earlier as stated in HADOOP-2797.A 2 step upgrade is required in this case first from 0.x <= 0.13 to one of version...
http://issues.apache.org/jira/browse/HDFS-293    Author: Konstantin Shvachko, 2014-07-18, 06:39
[HDFS-171] Redundant error logging in FSNamesystem. - HDFS - [issue]
...HADOOP-3509 introduced a new error message which is logged if FSNamesystem fails to initialize. This message turned out to be redundant, because it should and is logged further up the stack ...
http://issues.apache.org/jira/browse/HDFS-171    Author: Konstantin Shvachko, 2014-07-18, 06:32
[HDFS-80] Rename of a directory with many opened files blocks name-node for a long time. changeLease() to blame. - HDFS - [issue]
...I am creating a directory containing 200,000 files, and then renaming it.The rename operation is twice as long as the the total time for creating all those files.The worst thing is that the ...
http://issues.apache.org/jira/browse/HDFS-80    Author: Konstantin Shvachko, 2014-07-18, 06:28
[HDFS-337] Name collision for AccessControlException. - HDFS - [issue]
...There is a name collision in org.apache.hadoop.fs.permission.AccessControlException and java.security.AccessControlException.Since  java.security.AccessControlException is not an IOExce...
http://issues.apache.org/jira/browse/HDFS-337    Author: Konstantin Shvachko, 2014-07-17, 23:00
[HDFS-306] FSNamesystem.shutdown() should be a part of FSNamesystem.close() - HDFS - [issue]
...FSNamesystem should either close() or shutdown(), but not both.Traditionally we used to have FSNamesystem.close()....
http://issues.apache.org/jira/browse/HDFS-306    Author: Konstantin Shvachko, 2014-07-17, 22:43
[HDFS-2064] Warm HA NameNode going Hot - HDFS - [issue]
...This is the design for automatic hot HA for HDFS NameNode. It involves use of HA software and LoadReplicator - external to Hadoop components, which substantially simplify the architecture by...
http://issues.apache.org/jira/browse/HDFS-2064    Author: Konstantin Shvachko, 2014-06-06, 02:11
[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
[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
[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
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elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB