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[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, 2015-04-17, 13:27
[HDFS-7959] WebHdfs logging is missing on Datanode - HDFS - [issue]
...After the conversion to netty, webhdfs requests are not logged on datanodes. The existing jetty log only logs the non-webhdfs requests that come through the internal proxy....
http://issues.apache.org/jira/browse/HDFS-7959    Author: Kihwal Lee, 2015-04-16, 19:27
[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, 2015-04-13, 22:32
[HDFS-7373] Clean up temporary files after fsimage transfer failures - HDFS - [issue]
...When a fsimage (e.g. checkpoint) transfer fails, a temporary file is left in each storage directory.  If the size of name space is large, these files can take up quite a bit of space....
http://issues.apache.org/jira/browse/HDFS-7373    Author: Kihwal Lee, 2015-04-10, 21:30
[HDFS-8046] Allow better control of getContentSummary - HDFS - [issue]
...On busy clusters, users performing quota checks against a big directory structure can affect the namenode performance. It has become a lot better after HDFS-4995, but as clusters get bigger ...
http://issues.apache.org/jira/browse/HDFS-8046    Author: Kihwal Lee, 2015-04-09, 19:32
[HDFS-3087] Decomissioning on NN restart can complete without blocks being replicated - HDFS - [issue]
...If a data node is added to the exclude list and the name node is restarted, the decomissioning happens right away on the data node registration. At this point the initial block report has no...
http://issues.apache.org/jira/browse/HDFS-3087    Author: Kihwal Lee, 2015-04-09, 12:56
[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, 2015-04-09, 01:11
[HDFS-8068] Do not retry rpc calls If the proxy contains unresolved address - HDFS - [issue]
...When the InetSocketAddress object happens to be unresolvable (e.g. due to transient DNS issue), the rpc proxy object will not be usable since the client will throw UnknownHostException when ...
http://issues.apache.org/jira/browse/HDFS-8068    Author: Kihwal Lee, 2015-04-07, 23:36
Re: [Federation setup] Adding a new name node to federated cluster - HDFS - [mail # dev]
...You might be issuing the refresh command against the dataXfer port, not the rpc port of the datanode.-Kihwal      From: Ajith shetty  To: "[EMAIL PROTECTED]"  &...
   Author: Kihwal Lee, 2015-04-02, 16:32
[HDFS-5796] The file system browser in the namenode UI requires SPNEGO. - HDFS - [issue]
...After HDFS-5382, the browser makes webhdfs REST calls directly, requiring SPNEGO to work between user's browser and namenode.  This won't work if the cluster's security infrastructure i...
http://issues.apache.org/jira/browse/HDFS-5796    Author: Kihwal Lee, 2015-03-30, 21:50
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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