When a remote view update doesn't succeed there's a log message saying "Error applying view update...". This message had log level ERROR, but it's not really a hard error. View updates can fail for a multitude of reasons, even during normal operation. A failing view update isn't fatal, it will be saved as a view hint a retried later. Let's change the log level to WARN. It's something that shouldn't happen too much, but it's not a disaster either. ERROR log level causes trouble in tests which assume that an ERROR level message means that the test has failed. Refs: https://github.com/scylladb/scylladb/issues/15046#issuecomment-1712748784 For local view updates the log level stays at "ERROR", local view updates shouldn't fail. Signed-off-by: Jan Ciolek <jan.ciolek@scylladb.com> Closes scylladb/scylladb#15640