[THRIFT-3303] Disable concurrent cabal jobs on Travis to avoid GHC crash

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.9.3
• Component/s: Build Process
• Patch Info: Patch Available
• Assignee: Nobuaki Sukegawa
• Reporter: Nobuaki Sukegawa
• Created: 23/Aug/15 14:48
• Updated: 25/Sep/15 02:43
• Resolved: 21/Sep/15 21:48

Description

Recently more than half of Travis builds are failing because of GHC crush seemingly due to out of memory.

Several examples of such failures:
https://travis-ci.org/apache/thrift/jobs/75674316
https://travis-ci.org/apache/thrift/jobs/75674316
https://travis-ci.org/apache/thrift/jobs/74296672
https://travis-ci.org/apache/thrift/jobs/74296672
https://travis-ci.org/apache/thrift/jobs/73955088

The patch forces number of cabal install jobs to 1 so that it does not consume too much resource.

I've run several Travis builds with this setting and it's quite stable now.