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[MAPREDUCE-3698] Client cannot talk to the history server in secure mode - MapReduce - [issue]
...12/01/19 02:56:22 ERROR security.UserGroupInformation: PriviledgedActionException as:XXX@XXX(auth:KERBEROS) cause:java.io.IOException: Failed to specify server's Kerberos principal name12/01...
http://issues.apache.org/jira/browse/MAPREDUCE-3698    Author: Siddharth Seth, 2012-01-21, 13:22
[MAPREDUCE-3670] TaskAttemptListener should respond with errors to unregistered tasks - MapReduce - [issue]
...The TaskAttemptListener currently accepts TaskUmbilical calls from tasks which may have already been unregistered and processes updates. It should just send back Exceptions so that the tasks...
http://issues.apache.org/jira/browse/MAPREDUCE-3670    Author: Siddharth Seth, 2012-01-13, 22:33
[MAPREDUCE-3512] Batch jobHistory disk flushes - MapReduce - [issue]
...The mr-am flushes each individual job history event to disk for AM recovery. The history even handler ends up with a significant backlog for tests like MAPREDUCE-3402. History events could b...
http://issues.apache.org/jira/browse/MAPREDUCE-3512    Author: Siddharth Seth, 2012-01-12, 13:22
[MAPREDUCE-3618] TaskHeartbeatHandler holds a global lock for all task-updates - MapReduce - [issue]
http://issues.apache.org/jira/browse/MAPREDUCE-3618    Author: Siddharth Seth, 2012-01-11, 13:22
[MAPREDUCE-3299] Add AMInfo table to the AM job page - MapReduce - [issue]
...JobHistory has a table to list all AMs. A similar table can be added to the AM for info on past failed AMs and the current running one....
http://issues.apache.org/jira/browse/MAPREDUCE-3299    Author: Siddharth Seth, 2012-01-11, 13:22
[MAPREDUCE-3639] TokenCache likely broken for FileSystems which don't issue delegation tokens - MapReduce - [issue]
...Ref HADOOP-7963....
http://issues.apache.org/jira/browse/MAPREDUCE-3639    Author: Siddharth Seth, 2012-01-10, 19:00
[MAPREDUCE-3528] The task timeout check interval should be configurable independent of mapreduce.task.timeout - MapReduce - [issue]
...TaskHeartbeatHandler sleeps for 'mapreduce.task.timeout' - between each check. If a task/NM goes bad immediately after starting a task - the timeout is detected in ~2x the configured timeout...
http://issues.apache.org/jira/browse/MAPREDUCE-3528    Author: Siddharth Seth, 2012-01-10, 13:22
[MAPREDUCE-3490] RMContainerAllocator counts failed maps towards Reduce ramp up - MapReduce - [issue]
...The RMContainerAllocator does not differentiate between failed and successful maps while calculating whether reduce tasks are ready to launch. Failed tasks are also counted towards total com...
http://issues.apache.org/jira/browse/MAPREDUCE-3490    Author: Siddharth Seth, 2012-01-05, 13:22
[MAPREDUCE-3529] TokenCache does not cache viewfs credentials correctly - MapReduce - [issue]
...viewfs returns a list of delegation tokens for the actual namenodes. TokenCache caches these based on the actual service name - subsequent calls to TokenCache end up trying to get a new set ...
http://issues.apache.org/jira/browse/MAPREDUCE-3529    Author: Siddharth Seth, 2012-01-05, 13:22
[MAPREDUCE-3399] ContainerLocalizer should request new resources after completing the current one - MapReduce - [issue]
...Currently, the ContainerLocalizer to NM heartbeats to the NM every second. Not very significant, but this causes a ~4second delay in jobs (job jar, splits, etc). Instead, it should heartbeat...
http://issues.apache.org/jira/browse/MAPREDUCE-3399    Author: Siddharth Seth, 2011-12-28, 13:40
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