Adrian Petrescu created SPARK-17437:
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Summary: uiWebUrl is not accessible to JavaSparkContext or
pyspark.SparkContext
Key: SPARK-17437
URL: https://issues.apache.org/jira/browse/SPARK-17437
Project: Spark
Issue Type: Improvement
Components: Java API, PySpark, Web UI
Affects Versions: 2.0.0
Reporter: Adrian Petrescu
The Scala version of {{SparkContext}} has a handy field called {{uiWebUrl}}
that tells you which URL the SparkUI spawned by that instance lives at. This is
often very useful because the value for {{spark.ui.port}} in the config is only
a suggestion; if that port number is taken by another Spark instance on the
same machine, Spark will just keep incrementing the port until it finds a free
one. So, on a machine with a lot of running PySpark instances, you often have
to start trying all of them one-by-one until you find your application name.
Scala users have a way around this with {{uiWebUrl}} but Java and Python users
do not. This ticket (and the attached PR) fix this in the most straightforward
way possible, simply propagating this field through the {{JavaSparkContext}}
and into pyspark through the Java gateway.
Please let me know if any additional documentation/testing is needed.
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