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https://reviews.apache.org/r/52451/
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Review request for Ambari, Alejandro Fernandez and Sumit Mohanty.


Bugs: AMBARI-18508
    https://issues.apache.org/jira/browse/AMBARI-18508


Repository: ambari


Description
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**Issue:** LLAP daemons can be killed by the YARN Memory Monitor

The following messages in the AM log of LLAP YARN Application.
{quote}
is running beyond physical memory limits. Current usage: <USED> of <ALLOCATED> 
GB physical memory used.
{quote}

**Fix:** Increase the headroom space for heap from 1G (existing) to 6G.


Diffs
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  ambari-server/src/main/resources/stacks/HDP/2.5/services/stack_advisor.py 
2a4728a 

Diff: https://reviews.apache.org/r/52451/diff/


Testing
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- Python UT passes.
- Tested on live cluster.
- Ambari QA pending.


Thanks,

Swapan Shridhar

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