zuston opened a new pull request, #2577:
URL: https://github.com/apache/uniffle/pull/2577
### What changes were proposed in this pull request?
Cache the java9+ var to eliminate lock when creating concurrent hashmap
### Why are the changes needed?
fix #2576 .
`Enums.getIfPresent` will always using the global lock, this is unnecessary
and hurt the performance
### Does this PR introduce _any_ user-facing change?
<!--
(Please list the user-facing changes introduced by your change, including
1. Change in user-facing APIs.
2. Addition or removal of property keys.)
-->
No.
### How was this patch tested?
Existing tests.
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