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Posted to issues@spark.apache.org by "Rene Treffer (JIRA)" <ji...@apache.org> on 2015/06/01 10:33:17 UTC

[jira] [Created] (SPARK-8008) sqlContext.jdbc can kill your database due to high concurrency

Rene Treffer created SPARK-8008:
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             Summary: sqlContext.jdbc can kill your database due to high concurrency
                 Key: SPARK-8008
                 URL: https://issues.apache.org/jira/browse/SPARK-8008
             Project: Spark
          Issue Type: Bug
            Reporter: Rene Treffer


Spark tries to load as many partitions as possible in parallel, which can in turn overload the database although it would be possible to load all partitions given a lower concurrency.

It would be nice to either limit the maximum concurrency or to at least warn about this behavior.



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