[CASSANDRA-12074] Faster check for open JMX port on startup

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 3.10
• Component/s: Local/Startup and Shutdown
• Assignee: Tom Hobbs
• Reporter: Tom Hobbs

Authors

Tom Hobbs

Reviewers

Sam Tunnicliffe

• Created: 22/Jun/16 21:43
• Updated: 16/Apr/19 09:30
• Resolved: 28/Jun/16 16:18

Description

Since CASSANDRA-7254, we check whether the JMX port is available before starting Cassandra in order to provide a better error message when another Cassandra process is already running. The current check starts a Java process to do this, which takes ~3 seconds. Instead, we can use lsof, which is basically instantaneous.

By my estimate, this will shave about 40 minutes off our dtest runs.

Issue Links

• relates to: CASSANDRA-7254 NPE on startup if another Cassandra instance is already running