Comment 0 for bug 1870619

[Impact]

 * Rabbitmq-server has 2 configuration settings that affect how long it will wait for the mnesia database to become available
 * The default is 30 seconds x 10 retries = 300 seconds
 * The startup wrapper rabbitmq-server-wait will wait only 10 seconds
 * If the database does not come online within 10 seconds the startup script will fail despite the fact that rabbitmq-server is still waiting for another 290 seconds.
 * This behavior leads to falsely identified failures in OpenStack for example when a Rabbitmq cluster is restarted out of order (LP: #1828988)

[Test Case]

 * Create Rabbitmq cluster and create a queue with "ha-mode: all" policy
 * Shut down nodes one by one
 * Restart the node that was shut down first
 * This node will fail to start because it was not the master of the queue
 * Note that the startup script (SysV or systemd) will fail after 10 seconds while the rabbitmq-server process is still waiting for the database to come online

[Regression Potential]

 * I am not aware of any potential regressions