apache/spark — pull request #185 by andrewor14 (2014-03-20 02:29:00+00:00)
Title: [Hot Fix #42] Do not stop a SparkUI that has not bind()'ed

In Master, we create a SparkUI from event logs without bounding it to a port. This avoids creating a new Jetty server for each application. However, for each of these SparkUIs, since bind() is not called, calling stop() will throw an assertion failure.