fix: Remove no longer necessary isolation level (#416)

Backported-From: main Backported-To: 20.09
lablup · Apr 2, 2021 · 6273da7 · 6273da7
1 parent 09d8706
commit 6273da7
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diff --git a/changes/416.fix b/changes/416.fix
@@ -0,0 +1 @@
+Fix a regression of spawning multi-node cluster sessions due to DB API changes related to setting transaction isolation levels
diff --git a/src/ai/backend/manager/scheduler/dispatcher.py b/src/ai/backend/manager/scheduler/dispatcher.py
@@ -526,7 +526,7 @@ async def _schedule_multi_node_session(
         log_args = _log_args.get()
         agent_query_extra_conds = None
         kernel_agent_bindings: List[KernelAgentBinding] = []
-        async with agent_db_conn.begin(isolation_level="REPEATABLE READ"):
+        async with agent_db_conn.begin():
             # This outer transaction is rolled back when any exception occurs inside,
             # including scheduling failures of a kernel.
             # It ensures that occupied_slots are recovered when there are partial