[jira] [Created] (SPARK-32994) External accumulators (not start with InternalAccumulator.METRICS_PREFIX) may lead driver full GC problem

["Lantao Jin (Jira)" <ji...@apache.org>]

Lantao Jin created SPARK-32994:
----------------------------------

             Summary: External accumulators (not start with InternalAccumulator.METRICS_PREFIX) may lead driver full GC problem
                 Key: SPARK-32994
                 URL: https://issues.apache.org/jira/browse/SPARK-32994
             Project: Spark
          Issue Type: Bug
          Components: Spark Core, SQL
    Affects Versions: 3.0.1, 2.4.7, 3.1.0
            Reporter: Lantao Jin


We use Spark + Delta Lake, recently we find our Spark driver faced full GC problem (very heavy) when users submit a MERGE INTO query. The driver held over 100GB memory (depends on how much the max heap size set) and can not be GC forever. By making a heap dump we found the root cause.





--
This message was sent by Atlassian Jira
(v8.3.4#803005)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org