Test failed after 10 attempts.

java.lang.AssertionError: Test failed after 10 attempts.
	at org.apache.spark.launcher.LauncherServerSuite.waitForError(LauncherServerSuite.java:223)
	at org.apache.spark.launcher.LauncherServerSuite.testTimeout(LauncherServerSuite.java:126)
Caused by: java.lang.AssertionError: Expected error but message went through.
	at org.apache.spark.launcher.LauncherServerSuite.waitForError(LauncherServerSuite.java:215)
	at org.apache.spark.launcher.LauncherServerSuite.testTimeout(LauncherServerSuite.java:126)