[AMQ-3614] Unable to generate unique id when range of ports are blocked - org.apache.activemq.util.IdGenerator

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.5.1
• Fix Version/s: 5.6.0
• Component/s: Broker
• Assignee: Gary Tully
• Reporter: Jason Sherman
• Created: 30/Nov/11 21:11
• Updated: 01/Dec/11 17:29
• Resolved: 01/Dec/11 17:29

Description

org.apache.activemq.util.IdGenerator is unable to generate a unique id if a range of ports have been block.
Currently there is only one strategy create this id if the canAccessSystemProps condition is true:

if (canAccessSystemProps) {
            try {
                hostName = InetAddressUtil.getLocalHostName();
                ServerSocket ss = new ServerSocket(0);
                stub = "-" + ss.getLocalPort() + "-" + System.currentTimeMillis() + "-";
                Thread.sleep(100);
                ss.close();
            } catch (Exception ioe) {
                LOG.warn("could not generate unique stub", ioe);
            }
        } else {
            hostName = "localhost";
            stub = "-1-" + System.currentTimeMillis() + "-";
        }

No fallback strategy has been implemented if the canAccessSystemProp evaluates to true