[FLINK-1077] Flakey test CliFrontendPackageProgramTest

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Cannot Reproduce
• Fix Version/s: 0.7.0-incubating
• Assignee: Timo Walther
• Reporter: Stephan Ewen
• Created: 29/Aug/14 19:23
• Updated: 23/Sep/14 22:16
• Resolved: 21/Sep/14 18:31

Description

Test is error is CliFrontendPackageProgramTest # testPlanWithExternalClass()

The error occurs in my recent travis builds one in 10 times or so.

The following stack trace describes the error:

java.lang.AssertionError
 at org.junit.Assert.fail(Assert.java:86)
 at org.junit.Assert.assertTrue(Assert.java:41)
 at org.junit.Assert.assertTrue(Assert.java:52)
 at org.apache.flink.client.CliFrontendPackageProgramTest$1.loadClass(CliFrontendPackageProgramTest.java:249)

Is it possible that race conditions cause the classloader to be used for different classes as well? In any case, the test should change the assertion to assertEquals, such that the expected name is part of the error message (helps debugging what went wrong).