Phylolink fails to connect to postgres after package upgrade

[ansell]

Phylolink fails to connect to postgres after a package upgrade and shows the following error in its log files:

2018-06-05 08:25:03,489 ERROR [JDBCExceptionReporter] This connection has been closed.
2018-06-05 08:25:03,490 ERROR [JDBCExceptionReporter] This connection has been closed.
2018-06-05 08:25:03,498 ERROR [GrailsExceptionResolver] PSQLException occurred when processing request: [GET] /
This connection has been closed.. Stacktrace follows:
org.postgresql.util.PSQLException: This connection has been closed.
	at org.postgresql.jdbc2.AbstractJdbc2Connection.checkClosed(AbstractJdbc2Connection.java:714)
	at org.postgresql.jdbc2.AbstractJdbc2Connection.getAutoCommit(AbstractJdbc2Connection.java:680)
	at org.grails.datastore.gorm.GormStaticApi$_methodMissing_closure2.doCall(GormStaticApi.groovy:102)
	at au.org.ala.phyloviz.PhyloService.getDemoId(PhyloService.groovy:30)
	at au.org.ala.phyloviz.PhyloController.startPage(PhyloController.groovy:329)
	at grails.plugin.cache.web.filter.PageFragmentCachingFilter.doFilter(PageFragmentCachingFilter.java:200)
	at grails.plugin.cache.web.filter.AbstractFilter.doFilter(AbstractFilter.java:63)
	at au.org.ala.cas.client.UriFilter.doFilter(UriFilter.java:200)
	at au.org.ala.cas.client.UriFilter.doFilter(UriFilter.java:200)
	at au.org.ala.cas.client.UriFilter.doFilter(UriFilter.java:200)
	at org.jasig.cas.client.session.SingleSignOutFilter.doFilter(SingleSignOutFilter.java:65)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1152)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:622)
	at java.lang.Thread.run(Thread.java:748)

A suggestion from Simon is that the code from the following section may be useful to make phylolink more resilient to database interruptions:

https://github.com/AtlasOfLivingAustralia/volunteer-portal/blob/develop/grails-app/conf/application.yml#L303

A possible location for the local changes required may be in:

https://github.com/AtlasOfLivingAustralia/phylolink/blob/master/grails-app/conf/DataSource.groovy#L13