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Re: dfs.datanode.socket.reuse.keepalive - HDFS - [mail # dev]
...+1 for dropping the client side expiry down to something like 1-2 seconds. I'd rather do that than up the server side, since the server side resource (DN threads) is likely to be more conten...
   Author: Todd Lipcon, 2013-06-10, 17:35
[HDFS-4677] Editlog should support synchronous writes - HDFS - [issue]
...In the current implementation, NameNode editlog performs syncs to the persistent storage using the FileChannel#force Java APIs. This API is documented to be slower compared to an alternative...
http://issues.apache.org/jira/browse/HDFS-4677    Author: Ivan Mitic, 2013-06-09, 15:07
[HDFS-4895] Add a function of "-fixmisplaced" to fsck for fixing blocks in mistaken placed - HDFS - [issue]
http://issues.apache.org/jira/browse/HDFS-4895    Author: Junping Du, 2013-06-08, 01:45
[HDFS-4876] The javadoc of FileWithSnapshot is incorrect - HDFS - [issue]
...The javadoc said that snapshot files and the original file form a circular linked list.  It is no longer true....
http://issues.apache.org/jira/browse/HDFS-4876    Author: Tsz Wo, 2013-06-08, 01:00
[HDFS-4896] dfs -<command> webhdfs:// gives IllegalStateException for secure cluster - HDFS - [issue]
...Running:hadoop dfs -copyToLocal webhdfs://node1:port1/File1 /tmp/File113/06/07 21:54:58 WARN util.ShutdownHookManager: ShutdownHook 'ClientFinalizer' failed, java.lang.IllegalStateException:...
http://issues.apache.org/jira/browse/HDFS-4896    Author: yeshavora, 2013-06-07, 23:44
dfs.datanode.socket.reuse.keepalive - HDFS - [mail # dev]
...Hi all,  HDFS-941 added dfs.datanode.socket.reuse.keepalive.  This allows DataXceiver worker threads in the DataNode to linger for a second or two after finishing a request, in cas...
   Author: Colin McCabe, 2013-06-07, 23:29
[HDFS-4841] FsShell commands using secure webhfds fail ClientFinalizer shutdown hook - HDFS - [issue]
...Hadoop version:bash-4.1$ $HADOOP_HOME/bin/hadoop versionHadoop 3.0.0-SNAPSHOTSubversion git://github.com/apache/hadoop-common.git -r d5373b9c550a355d4e91330ba7cc8f4c7c3aac51Compiled by root ...
http://issues.apache.org/jira/browse/HDFS-4841    Author: Stephen Chu, 2013-06-07, 23:01
[HDFS-4832] Namenode doesn't change the number of missing blocks in safemode when DNs rejoin or leave - HDFS - [issue]
...Courtesy Karri VRK Reddy!1. Namenode lost datanodes causing missing blocks2. Namenode was put in safe mode3. Datanode restarted on dead nodes 4. Waited for lots of time for the NN UI to refl...
http://issues.apache.org/jira/browse/HDFS-4832    Author: Ravi Prakash, 2013-06-07, 21:43
[HDFS-4437] Clients should not retain leases on moved files - HDFS - [issue]
...Moving open files and/or parent directories of open files will rewrite the leases to the new path.  The client is not notified so future stream operations will fail.  However, as l...
http://issues.apache.org/jira/browse/HDFS-4437    Author: Daryn Sharp, 2013-06-07, 21:17
[HDFS-4874] create with OVERWRITE deletes existing file without checking the lease: feature or a bug. - HDFS - [issue]
...create with OVERWRITE flag will remove a file under construction even if the issuing client does not hold a lease on the file.It could be a bug or the feature that applications rely upon....
http://issues.apache.org/jira/browse/HDFS-4874    Author: Konstantin Shvachko, 2013-06-07, 21:17
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