No connection available

[msteiger]

The server list retrieval failed after 3 months of successful operation due to missing connections in the Hikari pool:

2016-01-10 20:29:35.129 [Thread-1190] INFO  o.t.web.model.ModuleListModelImpl - Would delete engine-tests-0.54.5-20151212.064209-26.jar_info.json
2016-01-10 20:30:39.883 [qtp1348453796-19] INFO  o.t.web.servlet.ModuleServlet - Requested lastest info as json
2016-01-10 20:37:32.796 [qtp1348453796-14] INFO  o.t.web.servlet.ModuleServlet - Requested lastest info as json
2016-01-10 20:39:32.391 [qtp1348453796-14] INFO  o.t.web.servlet.ModuleServlet - Requested lastest info as json
2016-01-10 20:46:51.698 [qtp1348453796-19] INFO  o.t.web.servlet.ModuleServlet - Requested lastest info as json
2016-01-10 20:52:36.425 [qtp1348453796-15] INFO  o.t.web.servlet.ServerServlet - Requested server list
2016-01-10 20:53:06.429 [qtp1348453796-15] ERROR o.t.web.servlet.ServerServlet - Could not connect to database
java.io.IOException: java.sql.SQLTransientConnectionException: HikariPool-0 - Connection is not available, request timed out after 30000ms.
    at org.terasology.web.model.ServerListModelImpl.getServers(ServerListModelImpl.java:72) ~[main/:na]
    at org.terasology.web.servlet.ServerServlet.list(ServerServlet.java:113) ~[main/:na]

As I understand it, Hikari refreshes all connections after a few minutes, but it still broke and it does not recover.

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