Github user zsxwing commented on a diff in the pull request: https://github.com/apache/spark/pull/15852#discussion_r88580974 --- Diff: sql/core/src/test/scala/org/apache/spark/sql/streaming/StreamTest.scala --- @@ -330,34 +331,51 @@ trait StreamTest extends QueryTest with SharedSQLContext with Timeouts { startedTest.foreach { action => logInfo(s"Processing test stream action: $action") action match { - case StartStream(trigger, triggerClock) => + case StartStream(trigger, triggerClock, additionalConfs) => verify(currentStream == null, "stream already running") verify(triggerClock.isInstanceOf[SystemClock] || triggerClock.isInstanceOf[StreamManualClock], "Use either SystemClock or StreamManualClock to start the stream") if (triggerClock.isInstanceOf[StreamManualClock]) { manualClockExpectedTime = triggerClock.asInstanceOf[StreamManualClock].getTimeMillis() } - lastStream = currentStream - currentStream = - spark - .streams - .startQuery( - None, - Some(metadataRoot), - stream, - sink, - outputMode, - trigger = trigger, - triggerClock = triggerClock) - .asInstanceOf[StreamExecution] - currentStream.microBatchThread.setUncaughtExceptionHandler( - new UncaughtExceptionHandler { - override def uncaughtException(t: Thread, e: Throwable): Unit = { - streamDeathCause = e - } + + val resetConfValues = mutable.Map[String, Option[String]]() + try { + additionalConfs.foreach(pair => { + val value = + if (spark.conf.contains(pair._1)) Some(spark.conf.get(pair._1)) else None + resetConfValues(pair._1) = value + spark.conf.set(pair._1, pair._2) }) + lastStream = currentStream + currentStream = + spark + .streams + .startQuery( + None, + Some(metadataRoot), + stream, + sink, + outputMode, + trigger = trigger, + triggerClock = triggerClock) + .asInstanceOf[StreamExecution] + currentStream.microBatchThread.setUncaughtExceptionHandler( + new UncaughtExceptionHandler { + override def uncaughtException(t: Thread, e: Throwable): Unit = { + streamDeathCause = e + } + }) + } finally { + // Rollback previous configuration values + resetConfValues.foreach { --- End diff -- The reset logic should be at the end of the method. Otherwise, it will change confs during a query is running.
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