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[HDFS-6942] Fix typos in log messages - HDFS - [issue]
...There are a bunch of typos in log messages. HADOOP-10946 was initially created, but may have failed due to being in multiple components. Try fixing typos on a per-component basis....
http://issues.apache.org/jira/browse/HDFS-6942    Author: Ray Chiang, 2014-08-26, 17:46
[HDFS-6827] Both NameNodes stuck in STANDBY state due to HealthMonitor not aware of the target's status changing sometimes - HDFS - [issue]
...In our production cluster, we encounter a scenario like this: ANN crashed due to write journal timeout, and was restarted by the watchdog automatically, but after restarting both of the NNs ...
http://issues.apache.org/jira/browse/HDFS-6827    Author: Zesheng Wu, 2014-08-26, 13:23
[HDFS-6871] Improve NameNode performance when creating file   - HDFS - [issue]
...Creating file with overwrite flag will cause NN fall into flush edit logs and block other requests if the file exists.When we create a file with overwrite flag (default is true) in HDFS, NN ...
http://issues.apache.org/jira/browse/HDFS-6871    Author: Yi Liu, 2014-08-26, 01:36
[HDFS-6184] Capture NN's thread dump when it fails over - HDFS - [issue]
...We have seen several false positives in terms of when ZKFC considers NN to be unhealthy. Some of these triggers unnecessary failover. Examples,1. SBN checkpoint caused ZKFC's RPC call into N...
http://issues.apache.org/jira/browse/HDFS-6184    Author: Ming Ma, 2014-08-26, 01:06
[HDFS-6900] Eliminate DU thread per block pool slice - HDFS - [issue]
...We use one DU thread per block pool slice to compute disk usage information. In addition to the thread overhead this results in the disk usage information being out of date for up to 10 minu...
http://issues.apache.org/jira/browse/HDFS-6900    Author: Arpit Agarwal, 2014-08-26, 00:16
[HDFS-6935] RawLocalFileSystem::supportsSymLinks is confusing - HDFS - [issue]
......  @Override  public boolean supportsSymlinks() {    return true;  }  @SuppressWarnings("deprecation")  @Override &nbs...
http://issues.apache.org/jira/browse/HDFS-6935    Author: Gopal V, 2014-08-26, 00:12
[HDFS-6581] Write to single replica in memory - HDFS - [issue]
...Per discussion with the community on HDFS-5851, we will implement writing to a single replica in DN memory via DataTransferProtocol.This avoids some of the issues with short-circuit writes, ...
http://issues.apache.org/jira/browse/HDFS-6581    Author: Arpit Agarwal, 2014-08-26, 00:01
[HDFS-6903] Crc32 checksum errors in Big-Endian Architecture - HDFS - [issue]
...Native Crc32 checksum calculation is not handled in Big-Endian Architecture.In this case, the platform is ppc64. Due to this several testcases in HDFS module fails.Running org.apache.hadoop....
http://issues.apache.org/jira/browse/HDFS-6903    Author: Ayappan, 2014-08-25, 23:48
[HDFS-6937] Another issue in handling checksum errors in write pipeline - HDFS - [issue]
...Given a write pipeline:DN1 -> DN2 -> DN3DN3 detected cheksum error and terminate, DN2 truncates its replica to the ACKed size. Then a new pipeline is attempted asDN1 -> DN2 -> DN...
http://issues.apache.org/jira/browse/HDFS-6937    Author: Yongjun Zhang, 2014-08-25, 22:51
[expand - 1 more] - Re: HDFS-6902 FileWriter should be closed in finally block in BlockReceiver#receiveBlock() - HDFS - [mail # dev]
...Let's discuss this on the JIRA.  I think Tsuyoshi OZAWA's solution is good.ColinOn Thu, Aug 21, 2014 at 7:08 AM, Ted Yu  wrote: ...
   Author: Colin McCabe, 2014-08-25, 22:50
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