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Re: are the HDFS javadocs published on the website? - HDFS - [mail # dev]
...That sounds like a good plan to me.   Aaron T. Myers Software Engineer, Cloudera   On Sat, Feb 23, 2013 at 6:11 PM, Andrew Wang wrote:  ...
   Author: Aaron T. Myers, 2013-02-25, 19:19
[HDFS-4462] 2NN will fail to checkpoint after an HDFS upgrade from a pre-federation version of HDFS - HDFS - [issue]
...The 2NN currently has logic to detect when its on-disk FS metadata needs an upgrade with respect to the NN's metadata (i.e. the layout versions are different) and in this case it will procee...
http://issues.apache.org/jira/browse/HDFS-4462    Author: Aaron T. Myers, 2013-02-06, 12:40
[HDFS-4448] HA NN does not start with wildcard address configured for other NN when security is enabled - HDFS - [issue]
...Currently if one tries to configure HA NNs use the wildcard HTTP address when security is enabled, the NN will fail to start with an error like the following:java.lang.IllegalArgumentExcepti...
http://issues.apache.org/jira/browse/HDFS-4448    Author: Aaron T. Myers, 2013-01-30, 00:37
[HDFS-4315] DNs with multiple BPs can have BPOfferServices fail to start due to unsynchronized map access - HDFS - [issue]
...In some nightly test runs we've seen pretty frequent failures of TestWebHdfsWithMultipleNameNodes. I've traced the root cause to an unsynchronized map access in the DataStorage class.More de...
http://issues.apache.org/jira/browse/HDFS-4315    Author: Aaron T. Myers, 2012-12-18, 12:42
[HDFS-3236] NameNode does not initialize generic conf keys when started with -initializeSharedEditsDir - HDFS - [issue]
...This means that configurations that scope the location of the name/edits/shared edits dirs by nameserice or namenode won't work with `hdfs namenode -initializeSharedEdits'....
http://issues.apache.org/jira/browse/HDFS-3236    Author: Aaron T. Myers, 2012-12-05, 23:05
[HDFS-2875] Clean up LeaseManager#changeLease - HDFS - [issue]
...The code for LeaseManager#changeLease and the associated FSNamesystem#unprotectedChangeLease is very fragile, and can be improved in several ways....
http://issues.apache.org/jira/browse/HDFS-2875    Author: Aaron T. Myers, 2012-11-29, 16:05
Re: What is the reason that DataNode should configured the http and streamer port with a number under 1024 in secure mode? - HDFS - [mail # dev]
...Hi Xiaohan,  You're right that if a malicious user can get a fake DN to register with the NN then the low ports don't matter. However, in order for a user to get a malicious DN to regis...
   Author: Aaron T. Myers, 2012-11-16, 19:41
[HDFS-4158] FSDirectory#hasSnapshot will NPE when deleting an empty directory - HDFS - [issue]
...The method attempts to iterate over the child list of the directory, but that list may be null and this isn't handled currently....
http://issues.apache.org/jira/browse/HDFS-4158    Author: Aaron T. Myers, 2012-11-07, 19:43
[HDFS-2946] HA: Put a cap on the number of completed edits files retained by the NN - HDFS - [issue]
...HDFS-2794 added a minimum number of transactions to retain in edits files. Since many underlying file systems put a cap on the number of entries in a single directory, we should put a cap on...
http://issues.apache.org/jira/browse/HDFS-2946    Author: Aaron T. Myers, 2012-10-17, 14:21
Re: Status of CheckpointNode and BackupNode - HDFS - [mail # dev]
...I'm also in favor of removing them. I've fielded many questions from users about their status, how they compare to other daemons that exist, etc. All I've seen them do is increase confusion ...
   Author: Aaron T. Myers, 2012-10-16, 23:51
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