b15212aa8f
When a plugin is stopped, schedule a Plugin Cleaner task to run 1 minute later to try and clean out the garbage and release the JAR from $site_path/tmp. If the cleaner doesn't succeed, schedule again for 1 minute later until it does. Each failed clean attempt backs off by another minute until it tries once every 15 minutes (4 times per hour). Plugins that don't clean are probably still linked into the live object graph somewhere and cannot be garbage collected. This indicates a memory leak, and the server administrator may need to restart the server to free up memory. Leaking should only happen with badly coded plugins that attempt to manually manage their listener registrations, or start threads they don't terminate. Change-Id: I0ca8c2c70b6fd9bcfbb7444ea3995210c9d80c2f