Github user aledsage commented on the pull request:
https://github.com/apache/incubator-brooklyn/pull/792#issuecomment-131797684
Background context for others... A Brooklyn user has a number of entities
in the dev/test environment, including `PostgreSqlNode`. For each, they stopped
the process (e.g. using the `stop` effector with `stopProcessMode=ALWAYS` and
`stopMachineMode=NEVER`). They then called the `start` effector, expecting that
to restart the process. For most types of entities it worked (because the
`install` and `customize` phases were idempotent. However, for `PostgreSqlNode`
the customize phase executed `initdb` (which you don't want to do on an
existing database).
The user should have called the `restart` effector with parameters
`restartMachine=false`. This would have just done the `launch` phase.
However, the `restart` effector has the downside of first stopping the
process (if it is currently running). What the user really wants is an effector
for "launch to process if it's not already running; if it is running then do
nothing".
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
