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[HADOOP-774] Datanodes fails to heartbeat when a directory with a large number of blocks is deleted - Hadoop - [issue]
...If a user removes a few files that are huge, it causes the namenode to send BlockInvalidate command to the relevant Datanodes. The Datanode process the blockInvalidate command as part of its...
http://issues.apache.org/jira/browse/HADOOP-774    Author: dhruba borthakur, 2009-10-27, 01:27
[HADOOP-645] Map-reduce task does not finish correctly when -reducer NONE is specified - Hadoop - [issue]
...Map-reduce task does not finish correctly when -reducer NONE is specified, The NONE option means that the reducer should not be generating any output. Using this option causes an exception i...
http://issues.apache.org/jira/browse/HADOOP-645    Author: dhruba borthakur, 2009-07-08, 17:05
[HADOOP-709] streaming job with Control characters in the command causes runtime exception in the job tracker - Hadoop - [issue]
...I run a streaming job with a Ctrl-A character in the command line option as follows:$HSTREAMING -mapper "/bin/sort -t'^A'" -input "input/*" -output outputIt causes a exeception as listed bel...
http://issues.apache.org/jira/browse/HADOOP-709    Author: dhruba borthakur, 2009-07-08, 17:05
[HADOOP-728] Map-reduce task does not produce correct results when -reducer NONE is specified through streaming - Hadoop - [issue]
...a) a file is create for the output instead of a directory.b) there is no way to understand what is going on from the client outputI can produce an example for you, if you like – but th...
http://issues.apache.org/jira/browse/HADOOP-728    Author: dhruba borthakur, 2009-07-08, 17:05
[HADOOP-1297] datanode sending block reports to namenode once every second - Hadoop - [issue]
...The namenode is requesting a block to be deleted. The datanode tries this operation and encounters an error because the block is not in the blockMap. The processCommand() method raises an ex...
http://issues.apache.org/jira/browse/HADOOP-1297    Author: dhruba borthakur, 2009-07-08, 16:42
[HADOOP-1306] DFS Scalability: Reduce the number of getAdditionalBlock RPCs on the namenode - Hadoop - [issue]
...One of the most-frequently-invoked RPCs in the namenode is the addBlock() RPC. The DFSClient uses this RPC to allocate one more block for a file that it is currently operating upon. The scal...
http://issues.apache.org/jira/browse/HADOOP-1306    Author: dhruba borthakur, 2009-07-08, 16:42
[HADOOP-1291] Split files in HDFS into appropriately named packages - Hadoop - [issue]
...HDFS should move into a set of packages under org.apache.hadoop.dfs, or more appropriately org.apache.hadoop.fs.dfs....
http://issues.apache.org/jira/browse/HADOOP-1291    Author: dhruba borthakur, 2009-07-08, 16:42
[HADOOP-1312] heartbeat monitor thread goes away - Hadoop - [issue]
...The heartbeat monitor thread encounters a ConcurrentModificationException while iterating over the "heartbeats" data structure. This occurs when the namenode was getting restarted. There are...
http://issues.apache.org/jira/browse/HADOOP-1312    Author: dhruba borthakur, 2009-07-08, 16:42
[HADOOP-1262] file corruption detected because dfs client does not use replica blocks for checksum file - Hadoop - [issue]
...A block of a crc file was corrupted. This caused the DFS client to detect a CRc corruption. The client tried all the three replicas of the data file. It did not try any replicas of the CRC f...
http://issues.apache.org/jira/browse/HADOOP-1262    Author: dhruba borthakur, 2009-07-08, 16:42
[HADOOP-1272] Extract InnerClasses from FSNamesystem into separate classes - Hadoop - [issue]
...This will make the code cleaner. Also, it leads itself to a cleaner and easily understandable finer-grain locking model....
http://issues.apache.org/jira/browse/HADOOP-1272    Author: dhruba borthakur, 2009-07-08, 16:42
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