symious opened a new pull request #3524:
URL: https://github.com/apache/hadoop/pull/3524


   ### Description of PR
   
   Branch 2.10.1 uses guava version of 11.0.2, which has a bug which affects 
the performance of cache, which was mentioned in HDFS-13821.
   
   Since upgrading guava version seems affecting too much, this ticket is to 
add a configuration setting when initializing cache to walk around this issue.
   
   ### How was this patch tested?
   
   Locally tested.
   
   ### For code changes:
   
   - [x] Does the title or this PR starts with the corresponding JIRA issue id 
(e.g. 'HADOOP-17799. Your PR title ...')?
   - [ ] Object storage: have the integration tests been executed and the 
endpoint declared according to the connector-specific documentation?
   - [ ] If adding new dependencies to the code, are these dependencies 
licensed in a way that is compatible for inclusion under [ASF 
2.0](http://www.apache.org/legal/resolved.html#category-a)?
   - [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`, 
`NOTICE-binary` files?
   
   


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