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[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-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-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
[HDFS-6622] Rename and AddBlock may race and produce invalid edits - HDFS - [issue]
...While investigating HDFS-6618, we have discovered that rename happening in the middle of getAdditionalBlock() can lead to logging of invalid edit entry.In  getAdditionalBlock() , the pa...
http://issues.apache.org/jira/browse/HDFS-6622    Author: Kihwal Lee, 2014-07-10, 15:55
Re: Jenkins build fails - HDFS - [mail # dev]
...Now builds are failing because of this. Please make sure build works with"-Pnative".[exec] CMake Error at/usr/share/cmake-2.8/Modules/FindPackageHandleStandardArgs.cmake:108(message): &...
   Author: Kihwal Lee, 2014-07-09, 17:58
[HDFS-6527] Edit log corruption due to defered INode removal - HDFS - [issue]
...We have seen a SBN crashing with the following error:[Edit log tailer] ERROR namenode.FSEditLogLoader:Encountered exception on operation AddBlockOp[path=/xxx,penultimateBlock=NULL, lastBlock...
http://issues.apache.org/jira/browse/HDFS-6527    Author: Kihwal Lee, 2014-06-30, 23:34
[HDFS-6329] WebHdfs does not work if HA is enabled on NN but logical URI is not configured. - HDFS - [issue]
...After HDFS-6100, namenode unconditionally puts the logical name (name service id) as the token service when redirecting webhdfs requests to datanodes, if it detects HA.For HA configurations ...
http://issues.apache.org/jira/browse/HDFS-6329    Author: Kihwal Lee, 2014-06-30, 09:18
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NEW: Monitor These Apps!
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