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[HDFS-7300] The getMaxNodesPerRack() method in BlockPlacementPolicyDefault is flawed - HDFS - [issue]
...The getMaxNodesPerRack() can produce an undesirable result in some cases. Three replicas on two racks. The max is 3, so everything can go to one rack. Two replicas on two or more racks. The ...
http://issues.apache.org/jira/browse/HDFS-7300    Author: Kihwal Lee, 2014-10-30, 15:17
[HDFS-6088] Add configurable maximum block count for datanode - HDFS - [issue]
...Currently datanode resources are protected by the free space check and the balancer.  But datanodes can run out of memory simply storing too many blocks. If the sizes of blocks are smal...
http://issues.apache.org/jira/browse/HDFS-6088    Author: Kihwal Lee, 2014-10-29, 15:09
[HDFS-6663] Admin command to track file and locations from block id - HDFS - [issue]
...A dfsadmin command that allows finding out the file and the locations given a block number will be very useful in debugging production issues.   It may be possible to add this feature t...
http://issues.apache.org/jira/browse/HDFS-6663    Author: Kihwal Lee, 2014-10-29, 14:19
[HDFS-6888] Remove audit logging of getFIleInfo() - HDFS - [issue]
...The audit logging of getFileInfo() was added in HDFS-3733.  Since this is a one of the most called method, users have noticed that audit log is now filled with this.  Since we now ...
http://issues.apache.org/jira/browse/HDFS-6888    Author: Kihwal Lee, 2014-10-23, 01:41
[HDFS-5962] Mtime and atime are not persisted for symbolic links - HDFS - [issue]
...In FSImageSerialization, the mtime and atime of symbolic links are hardcoded to be 0 when saving to fsimage, even though they are recorded in memory and shown in the listing until restarting...
http://issues.apache.org/jira/browse/HDFS-5962    Author: Kihwal Lee, 2014-09-04, 02:15
[HDFS-5961] OIV cannot load fsimages containing a symbolic link - HDFS - [issue]
...In ImageLoaderCurrent#processINode, the permission is not read for symlink INodes. So after incorrectly reading in the first symbolic link , the next INode can't be read.HDFS-4850 broke this...
http://issues.apache.org/jira/browse/HDFS-5961    Author: Kihwal Lee, 2014-09-04, 02:15
[HDFS-5047] Supress logging of full stack trace of quota and lease exceptions - HDFS - [issue]
...This is a follow up to HDFS-4714, which made a number of request-level exceptions to the "terse" list of the namenode rpc server.  I still see several exceptions causing full stack trac...
http://issues.apache.org/jira/browse/HDFS-5047    Author: Kihwal Lee, 2014-09-04, 00:51
[HDFS-4993] fsck can fail if a file is renamed or deleted - HDFS - [issue]
...In NamenodeFsck#check(), the getListing() and getBlockLocations() are not synchronized, so the file deletions or renames at the right moment can cause FileNotFoundException and failure of fs...
http://issues.apache.org/jira/browse/HDFS-4993    Author: Kihwal Lee, 2014-09-04, 00:51
[HDFS-5128] Allow multiple net interfaces to be used with HA namenode RPC server - HDFS - [issue]
...With the new RPCv9, NN RPC server can be bound to multiple IP addresses and serve clients connecting to different addressed using the same SPN. But the only way to have NN bind to multiple a...
http://issues.apache.org/jira/browse/HDFS-5128    Author: Kihwal Lee, 2014-09-04, 00:49
[HDFS-5150] Allow per NN SPN for internal SPNEGO. - HDFS - [issue]
...For more flexible configuration of HA, the SPN for NN's internal SPNEGO needs to be per-nn. Currently the config should contain "_HOST" or configured differently per node.This change should ...
http://issues.apache.org/jira/browse/HDFS-5150    Author: Kihwal Lee, 2014-09-04, 00:49
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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