skonto edited a comment on issue #24796: [SPARK-27900][CORE] Add uncaught exception handler to the driver URL: https://github.com/apache/spark/pull/24796#issuecomment-499791740 @zsxwing I describe how this happened in the jira ticket. I just run Spark on K8s SparkPi with 1M as the input parameter. This creates 1M tasks which create an OOM error for the DAGScheduler eventLooop threads since this is the one that will eventually try to submit the actual job, of course my jvm mem settings are enough to reproduce it, for the values pls have a look at the jira ticket. Of course this could happen in other cases where jvm is running out of memory and at some point this thread needs to allocate more memory.
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