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Arun C Murthy
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[MAPREDUCE-5093] Improve RM and HS token acquisition during job submission
...Jobs that intend to submit other jobs (ex. oozie, pig) require a RM token. Yarn has added the requirement of a HS token. Currently the submitter is required to explicitly obtain ...
, 2016-05-12, 18:24
[MAPREDUCE-4877] AM doesn't properly support multiple NNs
...Yarn/MR clusters assume there's a 1-to-1 correspondence between itself and a NN. Certain internal paths like the staging dir, job history, intermediate/intermediate-done dirs are resol...
, 2015-06-30, 05:36
[MAPREDUCE-3475] JT can't renew its own tokens
...When external systems submit jobs whose tasks need to submit additional jobs (such as oozie/pig), they include their own MR token used to submit the job. The token's renewer may not al...
, 2015-03-10, 02:50
[MAPREDUCE-2764] Fix renewal of dfs delegation tokens
...The JT may have issues renewing hftp tokens which disrupt long distcp jobs. The problem is the JT's delegation token renewal code is built on brittle assumptions. The token's ser...
, 2015-01-09, 18:12
[MAPREDUCE-4202] TestYarnClientProtocolProvider is broken
...The test fails because a cluster is unexpectedly created with an empty conf....
, 2014-09-04, 02:05
[MAPREDUCE-4921] JobClient should acquire HS token with RM principal
...The job client may acquire a history server token during job submission. The renewer is specified in a config value that the user must supply (for new api, a bit different for old api)...
, 2014-09-04, 00:25
[MAPREDUCE-3825] MR should not be getting duplicate tokens for a MR Job.
...This is the counterpart to HADOOP-7967. MR gets tokens for all input, output and the default filesystem when a MR job is submitted. The APIs in FileSystem make it challenging to avoid ...
, 2014-04-16, 23:04
[MAPREDUCE-3704] Yarn client goes into tight loop upon connection failure
...If the client fails to connect to the AM or HS, it will go into a tight loop retrying the connection. The log rapidly grows with multiple log lines per attempt. Based one of the ...
, 2014-04-16, 22:22
[MAPREDUCE-5262] AM generates NPEs when RM connection fails
...If the AM fails to connect to the RM, it causes a cascade of NPEs as the AM attempts to shutdown and exit.2013-05-21 00:31:56,153 ERROR [main] org.apache.hadoop.security.UserGroupInformation...
, 2013-05-21, 17:35
[MAPREDUCE-5096] Deprecate ability to not cancel tokens when job completes
...MR provides a config mapreduce.job.complete.cancel.delegation.tokens and an api Job#setCancelDelegationTokenUponJobCompletion to disable canceling tokens when a job completes. This fun...
, 2013-03-22, 21:44
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