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Posted to issues@spark.apache.org by "Lantao Jin (Jira)" <ji...@apache.org> on 2020/09/25 03:47:00 UTC
[jira] [Updated] (SPARK-32994) External accumulators (not start
with InternalAccumulator.METRICS_PREFIX) may lead driver full GC problem
[ https://issues.apache.org/jira/browse/SPARK-32994?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Lantao Jin updated SPARK-32994:
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Attachment: Screen Shot 2020-09-25 at 11.35.01 AM.png
> 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: 2.4.7, 3.0.1, 3.1.0
> Reporter: Lantao Jin
> Priority: Major
> Attachments: Screen Shot 2020-09-25 at 11.32.51 AM.png, Screen Shot 2020-09-25 at 11.35.01 AM.png, Screen Shot 2020-09-25 at 11.36.48 AM.png
>
>
> 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.
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