What does this error mean?
This error means an SSTable could not be verified for an SSTable import operation.
Why does this error occur?
When Cassandra is attempting to import SSTables, it first verifies that the SSTable should be included by checking that the tokens for the SSTable are owned by the node and the SSTable should be included. If an exception is thrown during the operation, the error is logged and a RunTimeException is thrown.
How do you fix this error?
Because this error is logged for any thrown error during the process, you will need to look at the full exception and stack trace after the logged message to determine what the initial cause may be. If you need assistance, please file a ticket with DataStax Support.