Saisai Shao created SPARK-4595:
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Summary: Spark MetricsServlet is not enabled because of
initialization ordering
Key: SPARK-4595
URL: https://issues.apache.org/jira/browse/SPARK-4595
Project: Spark
Issue Type: Bug
Components: Spark Core
Affects Versions: 1.2.0
Reporter: Saisai Shao
Web UI is initialized before MetricsSystem is started, at that time
MetricsSerlvet is not yet created, which will make MetricsServlet fail to
register into web UI.
Instead MetricsServlet handler should be added to the web UI after
MetricsSystem is started.
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