It sounds like you have done some concurrent table creation/deletion in the past (e.g. CREATE TABLE IF NOT EXISTS from multiple clients), which resulted in this mismatch. After you restarted the node, Cassandra corrected it by discarding the old table ID and any data associated with it. This is the expected behaviour. This issue has already been fixed, and you can safely delete the data directory with the incorrect table ID as it is no longer used by Cassandra. You should now run a full repair on this node to ensure it has all the data it owns. If you are /absolutely/ certain that the table with different IDs have identical schema, and the gc_grace_seconds hasn't past, you may move the data from the wrong data directory to the correct data directory, and then restart the node or run "nodetool refresh <keyspace> <table>" on the node before running the full repair, this may save you some streaming time. However, if the table schema is different, this may cause a havoc.

On 18/01/2024 05:21, ENES ATABERK wrote:

Hi all,

we have detected that table-uuid in linux file directory is different from system_schema.tables id.

I have executed nodetool describe cluster and see only one schema version in the cluster.

How we can fix this issue do anyone has any idea? Restarting the nodes only create a new empty directory with name system_schema.tables id directory but in this case i have two directories old one has sstables with incorrect uuid new one has correct uuid but empty.

thanks in advance


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