fix: Connection lost errors on macos (#64)

Postgres connections are dropped when database is running in the host machine. This solution adds a parameter to SQLAlchemy to ping the database and reconnect if it is dropped. This is pessimistic and may add latency. However it is the easiest solution. Refer: * https://stackoverflow.com/questions/55457069/how-to-fix-operationalerror-psycopg2-operationalerror-server-closed-the-conn * https://docs.sqlalchemy.org/en/14/core/pooling.html#disconnect-handling-pessimistic Fix #63
tokern · Jul 17, 2021 · 49a86e6 · 49a86e6
1 parent 1091e61
commit 49a86e6
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diff --git a/.idea/data-lineage.iml b/.idea/data-lineage.iml
diff --git a/.idea/inspectionProfiles/profiles_settings.xml b/.idea/inspectionProfiles/profiles_settings.xml
diff --git a/data_lineage/server.py b/data_lineage/server.py
@@ -285,11 +285,14 @@ def create_server(
         **catalog_options,
         connect_args={"application_name": "data-lineage:flask-restless"},
         max_overflow=40,
-        pool_size=20
+        pool_size=20,
+        pool_pre_ping=True
     )
 
     restful_catalog = Catalog(
-        **catalog_options, connect_args={"application_name": "data-lineage:restful"}
+        **catalog_options,
+        connect_args={"application_name": "data-lineage:restful"},
+        pool_pre_ping=True
     )
 
     app = Flask(__name__)