Parsed test spec with 2 sessions starting permutation: s1_b s1_xid s2_init s1_view_slot s1_cancel_s2 s1_view_slot s1_c step s1_b: BEGIN; step s1_xid: SELECT 'xid' FROM txid_current(); ?column? -------- xid (1 row) step s2_init: SELECT 'init' FROM pg_create_logical_replication_slot('slot_creation_error', 'test_decoding'); step s1_view_slot: SELECT slot_name, slot_type, active FROM pg_replication_slots WHERE slot_name = 'slot_creation_error' slot_name |slot_type|active -------------------+---------+------ slot_creation_error|logical |t (1 row) step s1_cancel_s2: SELECT pg_cancel_backend(pid) FROM pg_stat_activity WHERE application_name = 'isolation/slot_creation_error/s2'; step s2_init: <... completed> ERROR: canceling statement due to user request step s1_cancel_s2: <... completed> pg_cancel_backend ----------------- t (1 row) step s1_view_slot: SELECT slot_name, slot_type, active FROM pg_replication_slots WHERE slot_name = 'slot_creation_error' slot_name|slot_type|active ---------+---------+------ (0 rows) step s1_c: COMMIT; starting permutation: s1_b s1_xid s2_init s1_c s1_view_slot s1_drop_slot step s1_b: BEGIN; step s1_xid: SELECT 'xid' FROM txid_current(); ?column? -------- xid (1 row) step s2_init: SELECT 'init' FROM pg_create_logical_replication_slot('slot_creation_error', 'test_decoding'); step s1_c: COMMIT; step s2_init: <... completed> ?column? -------- init (1 row) step s1_view_slot: SELECT slot_name, slot_type, active FROM pg_replication_slots WHERE slot_name = 'slot_creation_error' slot_name |slot_type|active -------------------+---------+------ slot_creation_error|logical |f (1 row) step s1_drop_slot: SELECT pg_drop_replication_slot('slot_creation_error'); pg_drop_replication_slot ------------------------ (1 row) starting permutation: s1_b s1_xid s2_init s1_terminate_s2 s1_c s1_view_slot step s1_b: BEGIN; step s1_xid: SELECT 'xid' FROM txid_current(); ?column? -------- xid (1 row) step s2_init: SELECT 'init' FROM pg_create_logical_replication_slot('slot_creation_error', 'test_decoding'); step s1_terminate_s2: SELECT pg_terminate_backend(pid) FROM pg_stat_activity WHERE application_name = 'isolation/slot_creation_error/s2'; step s2_init: <... completed> FATAL: terminating connection due to administrator command server closed the connection unexpectedly This probably means the server terminated abnormally before or while processing the request. step s1_terminate_s2: <... completed> pg_terminate_backend -------------------- t (1 row) step s1_c: COMMIT; step s1_view_slot: SELECT slot_name, slot_type, active FROM pg_replication_slots WHERE slot_name = 'slot_creation_error' slot_name|slot_type|active ---------+---------+------ (0 rows)