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[HADOOP-1278] Fix the per-job tasktracker 'blacklist' - Hadoop - [issue]
...Today whenever a tracker is 'lost' all the jobs which ever ran on it are considered as failures and added to the blacklist, which automatically ensures that the particular TT is never consid...
http://issues.apache.org/jira/browse/HADOOP-1278    Author: Arun C Murthy, 2009-07-08, 16:52
[HADOOP-1280] Speculative tasks which are killed are being marked as 'FAILED' - Hadoop - [issue]
...It isn't a big problem once we get HADOOP-1050, however it's still confusing for users who need to double check if the task was a speculative one which got 'killed' or was a genuine failure....
http://issues.apache.org/jira/browse/HADOOP-1280    Author: Arun C Murthy, 2009-07-08, 16:52
[HADOOP-1281] Speculative map tasks aren't getting killed although the TIP completed - Hadoop - [issue]
...The speculative map tasks run to completion although the TIP succeeded since the other task completed elsewhere....
http://issues.apache.org/jira/browse/HADOOP-1281    Author: Arun C Murthy, 2009-07-08, 16:52
[HADOOP-1289] Just launched tasks aren't getting cleaned up on job completion (success/killed) - Hadoop - [issue]
...When a job is killed, if there are tasks which haven't been launched yet (just scheduled on a tasktracker) it leads to a situation where the non-launched task hangs around for a long time on...
http://issues.apache.org/jira/browse/HADOOP-1289    Author: Arun C Murthy, 2009-07-08, 16:52
[HADOOP-1322] Tasktracker blacklist leads to hung jobs in single-node cluster - Hadoop - [issue]
...Post HADOOP-1278, adding the tasktracker to the blacklist in single-node clusters leads to a situation where the entire cluster is 'flaky' and no trackers are available to execute tasks. The...
http://issues.apache.org/jira/browse/HADOOP-1322    Author: Arun C Murthy, 2009-07-08, 16:52
[HADOOP-1270] Randomize the fetch of map outputs - Hadoop - [issue]
...HADOOP-248 did away with random probing of maps for locating map outputs and instead we now rely on TaskCompletionEvents for the same. However we lost out on the benefit that the randomizati...
http://issues.apache.org/jira/browse/HADOOP-1270    Author: Arun C Murthy, 2009-07-08, 16:52
[HADOOP-1127] Speculative Execution and output of Reduce tasks - Hadoop - [issue]
...We've recently seen instances where jobs run with 'speculative execution' tend to be quite unstable and fail with AlreadyBeingCreatedException noticed at the NameNode. Also potentially we co...
http://issues.apache.org/jira/browse/HADOOP-1127    Author: Arun C Murthy, 2009-07-08, 16:52
[HADOOP-1050] Do not count lost tasktracker against the job - Hadoop - [issue]
...Equating a task failure to the one caused by a lost tasktracker is unfair on the job; in extreme cases it leads to a job being killed since a TIP could fail....
http://issues.apache.org/jira/browse/HADOOP-1050    Author: Arun C Murthy, 2009-07-08, 16:52
[HADOOP-1060] IndexOutOfBoundsException in JobInProgress.updateTaskStatus leads to hung jobs - Hadoop - [issue]
...When the JobTracker detects that a TaskTracker is 'lost' and tries to fail the incomplete tasks and the completed map tasks it fails with:2007-03-03 00:38:24,056 ERROR org.apache.hadoop.mapr...
http://issues.apache.org/jira/browse/HADOOP-1060    Author: Arun C Murthy, 2009-07-08, 16:52
[HADOOP-975] Separation of user tasks' stdout and stderr streams - Hadoop - [issue]
...Today both the stdout and stderr of the task's vm are sent to the same file is ${hadoop.log.dir}/userlogs; it would be very useful to separate them out for both viewing via the tasklog.jsp a...
http://issues.apache.org/jira/browse/HADOOP-975    Author: Arun C Murthy, 2009-07-08, 16:52
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elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB