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[MAPREDUCE-6439] AM may fail instead of retrying if RM shuts down during the allocate call
...We are seeing cases where MR AM gets a YarnRuntimeException thats thrown in RM and gets sent back to AM causing it to think that it has exhausted the number of retries. Copying the error whi...
, 2016-12-02, 00:35
[MAPREDUCE-6199] AbstractCounters are not reset completely on deserialization
...AbstractCounters are partially reset on deserialization. This patch completely resets them....
, 2016-08-25, 15:32
[MAPREDUCE-6449] MR Code should not throw and catch YarnRuntimeException to communicate internal exceptions
...In discussion of MAPREDUCE-6439 we discussed how throwing and catching YarnRuntimeException in MR code is incorrect and we should instead use some MR specific exception....
, 2015-10-23, 14:06
[MAPREDUCE-6353] Divide by zero error in MR AM when calculating available containers
...When running a sleep job with zero CPU vcores i see the following exception2015-04-30 06:41:06,954 ERROR [RMCommunicator Allocator] org.apache.hadoop.mapreduce.v2.app.rm.RMContainerA...
, 2015-05-10, 16:36
[MAPREDUCE-5966] MR1 FairScheduler use of custom weight adjuster is not thread safe for comparisons
...When comparing JobSchedulables one of the factors is the weight. If someone uses a custom weight adjuster, that may be called multiple times during a sort causing different values to return....
, 2014-07-26, 20:58
[MAPREDUCE-5979] FairScheduler: zero weight can cause sort failures
...When the weight is set to zero (which is possible with a custom weight adjuster) we can get failures in comparing schedulables.This is because when calculating running tasks to weight ratio ...
, 2014-07-23, 00:04
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