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[HDFS-4780] Use the correct relogin method for services - HDFS - [issue]
...A number of components call reloginFromKeytab() before making requests. For StandbyCheckpointer and SecondaryNameNode, where this can be called frequently, it generates many WARN messages li...
http://issues.apache.org/jira/browse/HDFS-4780    Author: Kihwal Lee, 2013-05-29, 15:07
[HDFS-4807] DFSOutputStream.createSocketForPipeline() should not include timeout extension on connect - HDFS - [issue]
...In createSocketForPipeline(), connect() is called with a timeout set to (socket_timeout + read_extension * num_datanodes). Since it is simply connecting to a single node, it does not make se...
http://issues.apache.org/jira/browse/HDFS-4807    Author: Kihwal Lee, 2013-05-24, 15:06
[HDFS-4477] Secondary namenode may retain old tokens - HDFS - [issue]
...Upon inspection of a fsimage created by a secondary namenode, we've discovered it contains very old tokens. These are probably the ones that were not explicitly canceled.  It may be rel...
http://issues.apache.org/jira/browse/HDFS-4477    Author: Kihwal Lee, 2013-05-17, 13:41
[HDFS-4786] WebHdfsFileSystem hangs on close() - HDFS - [issue]
...When close() is called via fs shoutdown hook, the synchronized method, removeRenewAction() hangs. This is because DelegationTokenRenewer calls DelayQueue.take() inside a synchronized block. ...
http://issues.apache.org/jira/browse/HDFS-4786    Author: Kihwal Lee, 2013-05-06, 14:48
[HDFS-4713] Wrong server principal is used for rpc calls to namenode if HA is enabled - HDFS - [issue]
...When various components are connecting to a namenode in a HA-enabled environment, a wrong server principal may be picked up.  This result in SASL failure, since the client-side used a w...
http://issues.apache.org/jira/browse/HDFS-4713    Author: Kihwal Lee, 2013-04-24, 20:50
[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, 2013-03-29, 15:27
[HDFS-4183] Throttle block recovery - HDFS - [issue]
...When a large number of files are abandoned without closing, a storm of lease expiration follows in about an hour (lease hard limit). For the last block of each file, block recovery is initia...
http://issues.apache.org/jira/browse/HDFS-4183    Author: Kihwal Lee, 2013-03-29, 15:27
[HDFS-3696] Create files with WebHdfsFileSystem goes OOM when file size is big - HDFS - [issue]
...When doing "fs -put" to a WebHdfsFileSystem (webhdfs://), the FsShell goes OOM if the file size is large. When I tested, 20MB files were fine, but 200MB didn't work.  I also tried readi...
http://issues.apache.org/jira/browse/HDFS-3696    Author: Kihwal Lee, 2013-03-27, 10:40
[HDFS-4605] Implement block-size independent file checksum - HDFS - [issue]
...The value of current getFileChecksum() is block-size dependent. Since FileChecksum is mainly intended for comparing content of files, removing this dependency will make FileCheckum in HDFS r...
http://issues.apache.org/jira/browse/HDFS-4605    Author: Kihwal Lee, 2013-03-19, 04:14
[HDFS-4495] Allow client-side lease renewal to be retried beyond soft-limit - HDFS - [issue]
...The current lease renewal code in DFSClient gives up after several retries, if the soft limit exceeds. This causes the client to abort.  Without this self destruction behavior, lease re...
http://issues.apache.org/jira/browse/HDFS-4495    Author: Kihwal Lee, 2013-02-14, 14:05
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