Nan Zhu 4d1d5d4010
[jvm-packages] fix potential unit test suites aborted issue (#6373)
* fix race conditio

* code cleaning

rm pom.xml-e

* clean again

* fix compilation issue

* recover

* avoid using getOrCreate

* interrupt zombie threads

* safe guard

* fix deadlock

* Update SparkParallelismTracker.scala
2020-11-17 10:59:26 -08:00
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