ignore_ready_future in load_new_ss_tables broke
migration_test:TestMigration_with_*.migrate_sstable_with_counter_test_expect_fail dtests.
The java.io.NotSerializableException in nodetool was caused by exceptions that
were too long.
This fix prints the problematic file names onto the node system log
and includes the casue in the resulting exception so to provide the user
with information about the nature of the error.
Fixes#4375
Signed-off-by: Benny Halevy <bhalevy@scylladb.com>
Message-Id: <20190331154006.12808-1-bhalevy@scylladb.com>
3749148339