Piotr Dulikowski
cb8253067d
Merge 'strong_consistency: fix crash when DROP TABLE races with in-flight DML' from Petr Gusev
...
When DROP TABLE races with an in-flight DML on a strongly-consistent
table, the node aborts in `groups_manager::acquire_server()` because the
raft group has already been erased from `_raft_groups`.
A concurrent `DROP TABLE` may have already removed the table from database
registries and erased the raft group via `schedule_raft_group_deletion`.
The `schema.table()` in `create_operation_ctx()` might not fail though
because someone might be holding `lw_shared_ptr<table>`, so that the
table is dropped but the table object is still alive.
Fix by accepting table_id in acquire_server and checking that the table
still exists in the database via `find_column_family` before looking up
the raft group. If the table has been dropped, find_column_family
throws no_such_column_family instead of the node aborting via
on_internal_error. When the table does exist, acquire_server proceeds
to acquire state.gate; schedule_raft_group_deletion co_awaits
gate::close, so it will wait for the DML operation to complete before
erasing the group.
backport: not needed (not released feature)
Fixes SCYLLADB-1450
Closes scylladb/scylladb#29430
* github.com:scylladb/scylladb:
strong_consistency: fix crash when DROP TABLE races with in-flight DML
test: add regression test for DROP TABLE racing with in-flight DML
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