If we have upgraded Cassandra binaries from 2.0 to 2.1 on ALL the nodes but upgradesstable is still pending, please provide the impact of following scenarios:
1. Running nodetool repair on one of the nodes while upgradesstables is still executing on one or more nodes in the cluster. 2. Running nodetool repair when upgradesstables failed abruptly on some of the nodes such that some sstable files are in new format while other sstable files are still in old format. Even though it may not be recommended to run I/O intensive operations like repair and upgradesstables simultaneously, can we assume that both the above sceanrios are now supported and will not break anything, especially after https://issues.apache.org/jira/browse/CASSANDRA-5772 has been fixed in 2.0? Regards Shini