I upgraded from 2.1 to 3.11 and started to get huge number of Digest mismatch errors in the DEBUG log. I ran a full repair in the cluster but it did not seem to cut back on these.
My consistency is QUORUM so my guess is this error is on reads but would this also affect my writes to all replicas if my RF is 3? DEBUG [ReadRepairStage:1788] 2018-09-01 03:40:41,737 ReadCallback.java:242 - Digest mismatch: org.apache.cassandra.service.DigestMismatchException: Mismatch for key DecoratedKey(-1046384702160736076, 423042334144313738374438) (6df35a84b4f9c1109342c744b84eead9 vs ef096894f14a8e2db75ed28396c570d3) at org.apache.cassandra.service.DigestResolver.compareResponses(DigestResolver.java:92) ~[apache-cassandra-3.11.2.jar:3.11.2] at org.apache.cassandra.service.ReadCallback$AsyncRepairRunner.run(ReadCallback.java:233) ~[apache-cassandra-3.11.2.jar:3.11.2] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_51] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_51] at org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:81) [apache-cassandra-3.11.2.jar:3.11.2] at org.apache.cassandra.concurrent.NamedThreadFactory$$Lambda$7/343563528.run(Unknown Source) [apache-cassandra-3.11.2.jar:3.11.2] at java.lang.Thread.run(Thread.java:745) [na:1.8.0_51] Ma
