H2 is still fully compatible with Java 7. This problem is not related with Java. But atlassian-plugin or some other piece of software that you use performs incorrect unexpected checks and needs to be fixed to be compatible with multi-release jars.
And yes, you can remove the entire META-INF/versions directory from multi-release jars as a workaround. -- You received this message because you are subscribed to the Google Groups "H2 Database" group. To unsubscribe from this group and stop receiving emails from it, send an email to h2-database+unsubscr...@googlegroups.com. To post to this group, send email to h2-database@googlegroups.com. Visit this group at https://groups.google.com/group/h2-database. For more options, visit https://groups.google.com/d/optout.