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A comment on Apache Spark Scale: A 60 TB+ production use case. Parent comment
Out of the linked issues these all seem like they would be "easy" to hit given enough data:
https://issues.apache.org/jira/browse/SPARK-13279
https://issues.apache.org/jira/browse/SPARK-13850
https://issues.apache.org/jira/browse/SPARK-13958
https://issues.apache.org/jira/browse/SPARK-14363
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Out of the linked issues these all seem like they would be "easy" to hit given enough data:
https://issues.apache.org/jira/browse/SPARK-13279
https://issues.apache.org/jira/browse/SPARK-13850
https://issues.apache.org/jira/browse/SPARK-13958
https://issues.apache.org/jira/browse/SPARK-14363