Lucee server crashes when 1 db connection hangs/fails for a clustered session/client scope

I had an unreachable Lucee server today, on a machine which is barely used. About 2 requests per minute come in, from pingdom.
After investigation, I found the following errors in requesttimeout.log (see attached)

The log says a request timeout occurred at
{{lucee.runtime.db.DatasourceConnectionPool.getDatasourceConnection(DatasourceConnectionPool.java:77)
at lucee.runtime.type.scope.storage.IKHandlerDatasource.loadData(IKHandlerDatasource.java:36)
at lucee.runtime.type.scope.storage.IKStorageScopeSupport.hasInstance(IKStorageScopeSupport.java:213)
at lucee.runtime.type.scope.ScopeContext.hasExistingCFSessionScope(ScopeContext.java:549)}}
After this timeout, any next request also times out at
at lucee.runtime.type.scope.storage.IKStorageScopeSupport.hasInstance(IKStorageScopeSupport.java:213)
Which makes sense, because the function at IKStorageScopeSupport.java:213 is a synchronized function, so the follow-up requests are waiting forever.

After a restart of Tomcat, the same thing happened again 70 minutes later! Again, see the (same) attached log.

The web application in question has this.sessionstorage = "datasource Name"; and this.sessionCluster=true; set in Application.cfc.