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  1. Spark
  2. SPARK-22319

SparkSubmit calls getFileStatus before calling loginUserFromKeytab

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Details

    • Bug
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 2.2.0, 2.3.0
    • 2.2.1, 2.3.0
    • Deploy, Spark Core
    • None

    Description

      In the SparkSubmit code, we call resolveGlobPaths, which eventually calls getFileStatus, which for HDFS is an RPC call to the NameNode: https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala#L346.

      We do this before we call loginUserFromKeytab, which is further down in the same method: https://github.com/apache/spark/blob/master/core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala#L655.

      The result is that the call to resolveGlobPaths fails in secure clusters with:

      javax.security.sasl.SaslException: GSS initiate failed [Caused by GSSException: No valid credentials provided (Mechanism level: Failed to find any Kerberos tgt)]
      

      A workaround is to kinit on the host before using spark-submit. However, it's better if this workaround isn't necessary. A simple fix is to call loginUserFromKeytab before attempting to interact with HDFS.

      At least for cluster mode, this would appear to be a regression caused by SPARK-21012.

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            Steven Rand Steven Rand
            Steven Rand Steven Rand
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