marchpure opened a new pull request #3976:
URL: https://github.com/apache/carbondata/pull/3976
### Why is this PR needed?
A few code of Inserting/Loading/InsertStage/IndexServer won't shutdown
executorservice. leads to thread leakage which will degrade the performance of
the driver and executor.
### What changes were proposed in this PR?
Shutdown executorservices as soon as finish using them.
### Does this PR introduce any user interface change?
- No
### Is any new testcase added?
- No
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