Confluence throws NullPointerException at start up when database is unavailable

java.lang.NullPointerException
	com.atlassian.spring.container.ContainerManager.getComponent(ContainerManager.java:33)
	com.atlassian.confluence.util.LazyComponentReference$Accessor.get(LazyComponentReference.java:44)
	com.atlassian.util.concurrent.Lazy$Strong.create(Lazy.java:85)
	com.atlassian.util.concurrent.LazyReference$Sync.run(LazyReference.java:321)
	com.atlassian.util.concurrent.LazyReference.getInterruptibly(LazyReference.java:143)
	com.atlassian.util.concurrent.LazyReference.get(LazyReference.java:112)
	com.atlassian.confluence.web.filter.LanguageExtractionFilter.getLocaleManager(LanguageExtractionFilter.java:63)
	com.atlassian.confluence.web.filter.LanguageExtractionFilter.doFilter(LanguageExtractionFilter.java:48)
	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
	com.atlassian.confluence.util.RequestCacheThreadLocalFilter.doFilter(RequestCacheThreadLocalFilter.java:25)
	com.atlassian.confluence.web.filter.DebugFilter.doFilter(DebugFilter.java:44)
	com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)
	com.atlassian.core.filters.HeaderSanitisingFilter.doFilter(HeaderSanitisingFilter.java:44)
	com.atlassian.confluence.servlet.FourOhFourErrorLoggingFilter.doFilter(FourOhFourErrorLoggingFilter.java:65)