[FLINK-3607] Decrease default forkCount for tests

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.1.0
• Component/s: Build System
• Labels: test-stability
• Assignee: Maximilian Michels
• Reporter: Maximilian Michels
• Created: 11/Mar/16 10:51
• Updated: 31/May/16 14:42
• Resolved: 31/May/16 13:21

Description

I'm seeing many tests failures because of timeouts:
https://builds.apache.org/job/flink-ci/1/testReport/

The forkCount is set to the aggressive value 1.5C. We should consider to reduce it at least to 1C (1 fork per exposed physical/virtual core). That could improve the test stability.

I did another test using 1C on Jenkins and had only one failed test and a decreased run time: https://builds.apache.org/job/flink-ci/2/testReport/

1.5C: 1h 57m
1C: 1h 35m

I'll run some more tests to verify this.