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[HDFS-5922] DN heartbeat thread can get stuck in tight loop - HDFS - [issue]
...We saw an issue recently on a test cluster where one of the DN threads was consuming 100% of a single CPU. Running jstack indicated that it was the DN heartbeat thread. I believe I've tracke...
http://issues.apache.org/jira/browse/HDFS-5922    Author: Aaron T. Myers, 2014-02-25, 14:51
[HDFS-5921] Cannot browse file system via NN web UI if any directory has the sticky bit set - HDFS - [issue]
...You'll see an error like this in the JS console if any directory has the sticky bit set:'helper_to_permission': function(chunk, ctx, bodies, params) {....var exec = ((parms.perm % 10) & ...
http://issues.apache.org/jira/browse/HDFS-5921    Author: Aaron T. Myers, 2014-02-11, 14:52
[HDFS-2264] NamenodeProtocol has the wrong value for clientPrincipal in KerberosInfo annotation - HDFS - [issue]
...The @KerberosInfo annotation specifies the expected server and client principals for a given protocol in order to look up the correct principal name from the config. The NamenodeProtocol has...
http://issues.apache.org/jira/browse/HDFS-2264    Author: Aaron T. Myers, 2014-01-22, 21:10
[HDFS-5223] Allow edit log/fsimage format changes without changing layout version - HDFS - [issue]
...Currently all HDFS on-disk formats are version by the single layout version. This means that even for changes which might be backward compatible, like the addition of a new edit log op code,...
http://issues.apache.org/jira/browse/HDFS-5223    Author: Aaron T. Myers, 2014-01-15, 23:14
[HDFS-4376]  Fix several race conditions in Balancer and resolve intermittent timeout of TestBalancerWithNodeGroup - HDFS - [issue]
...HDFS-4261 fixed several issues with the balancer and balancer tests, and reduced the frequency with which TestBalancerWithNodeGroup times out. Despite this, occasional timeouts still occur i...
http://issues.apache.org/jira/browse/HDFS-4376    Author: Aaron T. Myers, 2013-11-28, 14:43
[HDFS-5517] Lower the default maximum number of blocks per file - HDFS - [issue]
...We introduced the maximum number of blocks per file in HDFS-4305, but we set the default to 1MM. In practice this limit is so high as to never be hit, whereas we know that an individual file...
http://issues.apache.org/jira/browse/HDFS-5517    Author: Aaron T. Myers, 2013-11-17, 14:11
[HDFS-5027] On startup, DN should scan volumes in parallel - HDFS - [issue]
...On startup the DN must scan all replicas on all configured volumes before the initial block report to the NN. This is currently done serially, but can be done in parallel to improve startup ...
http://issues.apache.org/jira/browse/HDFS-5027    Author: Aaron T. Myers, 2013-11-11, 21:29
[HDFS-5403] WebHdfs client cannot communicate with older WebHdfs servers post HDFS-5306 - HDFS - [issue]
...HDFS-5306 introduced the field infoSecurePort to the DatanodeIDProto PB definition and made it optional for compatibility purposes. However, we don't correctly the handle the case when this ...
http://issues.apache.org/jira/browse/HDFS-5403    Author: Aaron T. Myers, 2013-11-01, 21:59
[HDFS-5433] When reloading fsimage during checkpointing, we should clear existing snapshottable directories - HDFS - [issue]
...The complete set of snapshottable directories are referenced both via the file system tree and in the SnapshotManager class. It's possible that when the 2NN performs a checkpoint, it will re...
http://issues.apache.org/jira/browse/HDFS-5433    Author: Aaron T. Myers, 2013-10-31, 15:20
[HDFS-4657] Limit the number of blocks logged by the NN after a block report to a configurable value. - HDFS - [issue]
...If incremental BR is received before first full BR NN will log a line for every block on a DN.This can impact restart times pretty substantially if the DNs have a lot of blocks, and since th...
http://issues.apache.org/jira/browse/HDFS-4657    Author: Aaron T. Myers, 2013-10-30, 13:03
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