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Vinod Kumar Vavilapalli
Arun C Murthy
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[MAPREDUCE-3639] TokenCache likely broken for FileSystems which don't issue delegation tokens
, 2012-01-10, 19:00
[MAPREDUCE-3528] The task timeout check interval should be configurable independent of mapreduce.task.timeout
...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...
, 2012-01-10, 13:22
[MAPREDUCE-3490] RMContainerAllocator counts failed maps towards Reduce ramp up
...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...
, 2012-01-05, 13:22
[MAPREDUCE-3529] TokenCache does not cache viewfs credentials correctly
...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 ...
, 2012-01-05, 13:22
[MAPREDUCE-3399] ContainerLocalizer should request new resources after completing the current one
...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...
, 2011-12-28, 13:40
[MAPREDUCE-3573] Add display names for Shuffle Counters, Uber job counters
, 2011-12-16, 05:32
[MAPREDUCE-3450] NM port info no longer available in JobHistory
...The NM RPC port used to be part of the hostname field in JobHistory. That seems to have gone missing. Required for the task log link on the history server....
, 2011-11-30, 13:33
[MAPREDUCE-3468] Change version to 0.23.1 for ant builds on the 23 branch
...Maven version has been changed to 0.23.1-SNAPSHOT. The ant build files need to change as well....
, 2011-11-24, 13:15
[MAPREDUCE-3455] TokenCache should only call getDelegationToken if getDelegationTokens does not return valid tokens
...Currently getDelegationToken is called irrespective of whether getDelegationTokens gives back valid tokens....
, 2011-11-22, 22:09
[MAPREDUCE-3400] Change JobHistoryParser to @InterfaceAudience:public
...There's several tools outside of MapReduce which may be used to process MR job history files. Instead of these tools writing their own parser, they could use the MR JobHistoryParser....
, 2011-11-15, 05:32
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