[jira] [Created] (SPARK-2975) SPARK_LOCAL_DIRS may cause problems when running in local mode

["Josh Rosen (JIRA)" <ji...@apache.org>]

Josh Rosen created SPARK-2975:
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             Summary: SPARK_LOCAL_DIRS may cause problems when running in local mode
                 Key: SPARK-2975
                 URL: https://issues.apache.org/jira/browse/SPARK-2975
             Project: Spark
          Issue Type: Bug
          Components: Spark Core
    Affects Versions: 1.0.0, 1.1.0
            Reporter: Josh Rosen
            Priority: Minor


If we're running Spark in local mode and {{SPARK_LOCAL_DIRS}} is set, the {{Executor}} modifies SparkConf so that this value overrides {{spark.local.dir}}.  Normally, this is safe because the modification takes place before SparkEnv is created.  In local mode, the Executor uses an existing SparkEnv rather than creating a new one, so it winds up with a DiskBlockManager that created local directories with the original {{spark.local.dir}} setting, but other components attempt to use directories specified in the _new_ {{spark.local.dir}}, leading to problems.

I discovered this issue while testing Spark 1.1.0-snapshot1, but I think it will also affect Spark 1.0 (haven't confirmed this, though).

(I posted some comments at https://github.com/apache/spark/pull/299#discussion-diff-15975800, but also opening this JIRA so this isn't forgotten.)



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