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[HDFS-6334] Client failover proxy provider for IP failover based NN HA - HDFS - [issue]
...With RPCv9 and improvements in the SPNEGO auth handling, it is possible to set up a pair of HA namenodes utilizing IP failover as client-request fencing mechanism.This jira will make it poss...
http://issues.apache.org/jira/browse/HDFS-6334    Author: Kihwal Lee, 2014-09-03, 21:34
[HDFS-5114] getMaxNodesPerRack() in BlockPlacementPolicyDefault does not take decommissioning nodes into account. - HDFS - [issue]
...If a large proportion of data nodes are being decommissioned, one or more racks may not be writable. However this is not taken into account when the default block placement policy module inv...
http://issues.apache.org/jira/browse/HDFS-5114    Author: Kihwal Lee, 2014-09-03, 19:17
[HDFS-6250] TestBalancerWithNodeGroup.testBalancerWithRackLocality fails - HDFS - [issue]
...It was seen in https://builds.apache.org/job/PreCommit-HDFS-Build/6669/java.lang.AssertionError: expected:<1800> but was:<1810> at org.junit.Assert.fail(Assert.java:93) at org.ju...
http://issues.apache.org/jira/browse/HDFS-6250    Author: Kihwal Lee, 2014-08-15, 06:41
[HDFS-6016] Update datanode replacement policy to make writes more robust - HDFS - [issue]
...As discussed in HDFS-5924, writers that are down to only one node due to node failures can suffer if a DN does not restart in time. We do not worry about writes that began with single replic...
http://issues.apache.org/jira/browse/HDFS-6016    Author: Kihwal Lee, 2014-08-13, 16:45
Re: [VOTE] Migration from subversion to git for version control - HDFS - [mail # dev]
...+1 (binding)KihwalOn 8/8/14, 9:57 PM, "Karthik Kambatla"  wrote: ...
   Author: Kihwal Lee, 2014-08-11, 20:44
[HDFS-6651] Deletion failure can leak inodes permanently. - HDFS - [issue]
...As discussed in HDFS-6618, if a deletion of tree fails in the middle, any collected inodes and blocks will not be removed from INodeMap and BlocksMap. Since fsimage is saved by iterating ove...
http://issues.apache.org/jira/browse/HDFS-6651    Author: Kihwal Lee, 2014-07-29, 02:50
[HDFS-6696] Name node cannot start if the path of a file under construction contains ".snapshot" - HDFS - [issue]
...Using -renameReserved to rename ".snapshot" in a pre-hdfs-snapshot feature fsimage during upgrade only works, if there is nothing under construction under the renamed directory.  I am n...
http://issues.apache.org/jira/browse/HDFS-6696    Author: Kihwal Lee, 2014-07-25, 00:45
[HDFS-6599] 2.4 addBlock is 10 to 20 times slower compared to 0.23 - HDFS - [issue]
...From one of our busiest 0.23 clusters:"AddBlockAvgTime" : 0.9514711501719515"CreateAvgTime" : 1.7564162389174"CompleteAvgTime" : 1.3310406035056548"BlockReceivedAndDeletedAvgTime" : 0.661210...
http://issues.apache.org/jira/browse/HDFS-6599    Author: Kihwal Lee, 2014-07-21, 06:42
[HDFS-5522] Datanode disk error check may be incorrectly skipped - HDFS - [issue]
...After HDFS-4581 and HDFS-4699, checkDiskError() is not called when network errors occur during processing data node requests.  This appears to create problems when a disk is having prob...
http://issues.apache.org/jira/browse/HDFS-5522    Author: Kihwal Lee, 2014-07-16, 08:56
[HDFS-6618] FSNamesystem#delete drops the FSN lock between removing INodes from the tree and deleting them from the inode map - HDFS - [issue]
...After HDFS-6527, we have not seen the edit log corruption for weeks on multiple clusters until yesterday. Previously, we would see it within 30 minutes on a cluster.But the same condition wa...
http://issues.apache.org/jira/browse/HDFS-6618    Author: Kihwal Lee, 2014-07-10, 15:55
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