[FLINK-4052] Unstable test ConnectionUtilsTest

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.0.2, 1.3.0
• Fix Version/s: 1.7.0
• Component/s: Tests
• Labels: pull-request-available test-stability
• Assignee: Stephan Ewen
• Reporter: Stephan Ewen
• Created: 09/Jun/16 19:32
• Updated: 19/Oct/18 09:12
• Resolved: 19/Oct/18 09:12

Description

The error is the following:

ConnectionUtilsTest.testReturnLocalHostAddressUsingHeuristics:59 expected:<testing-worker-linux-docker-e744e561-3361-linux-13/172.17.5.9> but was:</127.0.0.1>

The probable cause for the failure is that the test tries to select an unused closed port (from the ephemeral range), and then assumes that all connections to that port fail.

If a concurrent test actually uses that port, connections to the port will succeed.

Issue Links

• is duplicated by: FLINK-3687 org.apache.flink.runtime.net.ConnectionUtilsTest fails
• is duplicated by: FLINK-8623 ConnectionUtilsTest.testReturnLocalHostAddressUsingHeuristics unstable on Travis
• links to: GitHub Pull Request #6853