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[HDFS-5138] Support HDFS upgrade in HA - HDFS - [issue]
...With HA enabled, NN wo't start with "-upgrade". Since there has been a layout version change between 2.0.x and 2.1.x, starting NN in upgrade mode was necessary when deploying 2.1.x to an exi...
http://issues.apache.org/jira/browse/HDFS-5138    Author: Kihwal Lee, 2015-05-22, 20:01
[HDFS-4185] Add a metric for number of active leases - HDFS - [issue]
...We have seen cases of systematic open file leaks, which could have been detected if we have a metric that shows number of active leases....
http://issues.apache.org/jira/browse/HDFS-4185    Author: Kihwal Lee, 2015-05-19, 16:33
[HDFS-6888] Allow selectively audit logging ops - 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, 2015-05-15, 17:09
[HDFS-8358] TestTraceAdmin fails - HDFS - [issue]
...After HADOOP-11912, TestTraceAdmin#testCreateAndDestroySpanReceiver in hdfs started failing.It was probably unnoticed because the jira changed and triggered unit testing in common only....
http://issues.apache.org/jira/browse/HDFS-8358    Author: Kihwal Lee, 2015-05-14, 16:48
[HDFS-8150] Make getFileChecksum fail for blocks under construction - HDFS - [issue]
...We have seen the cases of validating data copy using checksum then the content of target changing. It turns out the target wasn't closed successfully, so it was still under-construction. &nb...
http://issues.apache.org/jira/browse/HDFS-8150    Author: Kihwal Lee, 2015-05-14, 16:48
[HDFS-8041] Consider remaining space during block blockplacement if dfs space is highly utilized - HDFS - [issue]
...This feature is helpful in avoiding smaller nodes (i.e. heterogeneous environment) getting constantly being full when the overall space utilization is over a certain threshold.  When th...
http://issues.apache.org/jira/browse/HDFS-8041    Author: Kihwal Lee, 2015-05-14, 13:14
[HDFS-8395] Verify on-disk data after transferring block data - HDFS - [issue]
...Currently the integrity of on-disk data is not checked during pipeline recovery or replication. The target in the pipeline-recovery-transfer can detect a corruption, but sometimes it is dete...
http://issues.apache.org/jira/browse/HDFS-8395    Author: Kihwal Lee, 2015-05-13, 23:34
[HDFS-7894] Rolling upgrade readiness is not updated in jmx until query command is issued. - HDFS - [issue]
...When a hdfs rolling upgrade is started and a rollback image is created/uploaded, the active NN does not update its rollingUpgradeInfo until it receives a query command via RPC. This results ...
http://issues.apache.org/jira/browse/HDFS-7894    Author: Kihwal Lee, 2015-05-09, 15:27
[HDFS-8315] Datanode does not log reads - HDFS - [issue]
...HDFS-6836 made datanode read request logging DEBUG.  There is a good reason why it was at INFO for so many years.  This is very useful in debugging load issues. This jira will reve...
http://issues.apache.org/jira/browse/HDFS-8315    Author: Kihwal Lee, 2015-05-08, 16:22
[HDFS-7097] Allow block reports to be processed during checkpointing on standby name node - HDFS - [issue]
...On a reasonably busy HDFS cluster, there are stream of creates, causing data nodes to generate incremental block reports.  When a standby name node is checkpointing, RPC handler threads...
http://issues.apache.org/jira/browse/HDFS-7097    Author: Kihwal Lee, 2015-05-04, 14:24
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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