MR job Split locations null

[#1]

I am running a mapreduce job, calculating the split locations and I see job.split and job.splitmetainfo files contain the locations, but mapper side it is prining the locations null

CDH enterprise 5.14.0

Sep 7, 9:16:49.300 AM INFO org.apache.hadoop.mapred.MapTask
Processing split: AccInputSplit [splitId=174, locations=[null, null, null, null, null, null, null, null, null, null], splitLength=516537674]

anybody seen like this?

[#2]

Are you certain your custom split class' readFields method is initialising
the locations correctly when deserialising? I can only guess at what's
wrong for this specific situation without the relevant source bits, sorry.

The tasks all receive the same splits file you've inspected.

Does a local job runner test work fine?

[#3]

>>> your custom split class' readFields method

I will investigate this, update this thread, thanks

[#4]

@Harsh J you are right readFields is just a dummy,

but getLocations() is fine, we are using fair scheduler, which should take getLocations() and schedule the job to according to data localituy right?

[#5]

Thanks for the help,

proper implmentation of readfields solved the problem.