[HBASE-4746] Use a random ZK client port in unit tests so we can run them in parallel

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.94.0
• Hadoop Flags: Reviewed
• Release Note: HTable ctors which only take table name are removed in 0.94
• Assignee: Mikhail Gryzykhin
• Reporter: Mikhail Gryzykhin
• Created: 04/Nov/11 01:29
• Updated: 12/Oct/12 05:35
• Resolved: 07/Nov/11 18:40

Description

The hard-coded ZK client port has long been a problem for running HBase test suite in parallel. The mini ZK cluster should run on a random free port, and that port should be passed to all parts of the unit tests that need to talk to the mini cluster. In fact, randomizing the port exposes a lot of places in the code where a new configuration is instantiated, and as a result the client tries to talk to the default ZK client port and times out.

The initial fix is for 0.89-fb, where it already allows to run unit tests in parallel in 10 minutes. A fix for the trunk will follow.