Github user neykov commented on the pull request:
https://github.com/apache/incubator-brooklyn/pull/615#issuecomment-97455410
Failing with NPE because it is still trying to reserve the port - this is
done regardless of the type of the config value as the key is coming from
`getEntityType().getSensors()` which are inferred from the class fields
(returning key `PortAttributeSensorAndConfigKey` which tries to obtain a free
port).
From the log:
```
SolrServerImpl{id=xMgHHmbI}: port 8983 not available for solr.http.port
```
I don't see how we can work around two `PortAttributeSensorAndConfigKey`
fighting for the same port, can't be overridden with config only. As I wrote
above changing `SEARCH_SOLR_PORT` to a `ConfigKey<Integer>` will solve the
problem.
---
When Solr is created as a child of Riak, might be better to set
`SoftwareProcess.CHILDREN_STARTABLE_MODE=FOREGROUND_LATE` so the two installs
don't fight over apt-get. Looks like Riak is happy to start before there's a
Solr port to talk to, but this might prove to be a problem as well.
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