okumin commented on code in PR #5562:
URL: https://github.com/apache/hive/pull/5562#discussion_r1861438340
##########
ql/src/java/org/apache/hadoop/hive/ql/exec/mapjoin/MapJoinMemoryExhaustionHandler.java:
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@@ -96,7 +96,12 @@ public void checkMemoryStatus(long tableContainerSize, long
numRows)
+ tableContainerSize + "\tMemory usage:\t" + usedMemory +
"\tpercentage:\t" + percentageNumberFormat.format(percentage);
console.printInfo(msg);
if(percentage > maxMemoryUsage) {
- throw new MapJoinMemoryExhaustionError(msg);
+ System.gc();
Review Comment:
I wondered if we can use System.gc, a JVM global method, for a task-local
problem. I basically don't know why we implemented
MapJoinMemoryExhaustionHandler. I might be saying something strange
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