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Status Not under consideration
Created by Guest
Created on Oct 4, 2019

Add functionality to pass arguments to TEZ from BIBQ hive process

We would like to request changes in the IAjobs process to allow the passing of memory parameters from IA > TEZ.

We are currently experiencing OOM/GC errors in TEZ where the TEZ process gets killed and the IA job aborts.

 

Case # is TS002817173

 

Because we have such a large cluster and the queue that this application uses has many resources, it creates this unique issue.  Hadoop Engineering and HDP have given this explanation:

 

The issue is about Tez engine calculating the number of splits which is dependent on the number of files in the table as well as the amount of resources available in the queue. Tez does the grouping based on these parameters and running into out of memory issues when it was running in a queue with more resources. The issue seems to be very specific to one query and not others.  

 

Our hadoop engineering team recommends passing in the following parameters:

set tez.am.resource.memory.mb=10240; set tez.am.launch.cmd-opts=-Xmx8192m;

 

Our hadoop engineering team is applying a tactical solution where they will increase the AM memory allocations on the hive server url that the IA jobs use. This will also impact all BI jobs that use hive, so we want to limit the timeframe of using this approach.

Needed by Date Nov 11, 2019
  • ADMIN RESPONSE
    Sep 28, 2020

    Thank you for your idea. All enhancements requests will be considered for IBM Watson Knowledge Catalog moving forward.