Guava broke backwards compatibility again. Downstream uses (like Cassandra-Java) have to do more than just bump a version of a dep, sadly. Version 27.0 is out - https://mvnrepository.com/artifact/com.google.guava/guava/27.0-jre
Can Cassandra upgrade Guava to latest, please? Then downstream users of Cassandra can upgrade too. Perhaps also consider shading Guava if the usage is entirety a internal concern. I'd have raised a Jira ticket, but https://issues.apache.org/jira is pretty much non-responsive for search and new issues. I'd raise a ticket for that too, but ... - Paul
