tao meng created HUDI-1688:
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Summary: hudi write should uncache rdd， when the write operation
is finnished
Key: HUDI-1688
URL: https://issues.apache.org/jira/browse/HUDI-1688
Project: Apache Hudi
Issue Type: Bug
Components: Spark Integration
Affects Versions: 0.7.0
Reporter: tao meng
Fix For: 0.8.0
now， hudi improve write performance by cache necessary rdds； however when the
write operation is finnished， those cached rdds have not been uncached which
waste lots of memory.
[https://github.com/apache/hudi/blob/master/hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/table/action/commit/BaseSparkCommitActionExecutor.java#L115]
https://github.com/apache/hudi/blob/master/hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/table/action/commit/BaseSparkCommitActionExecutor.java#L214
In our environment：
step1： insert 100GB data into hudi table by spark （ok）
step2： insert another 100GB data into hudi table by spark again （oom ）
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