From bd13280556204e01fa8caa0f28fd6b62157cdb3d Mon Sep 17 00:00:00 2001
From: Pantelis Kouris <ppkouris@gmail.com>
Date: Tue, 3 May 2022 10:09:39 +0200
Subject: [PATCH] added comment for issue #266
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Co-authored-by: Dion Häfner <dion.haefner@nbi.ku.dk>
---
 terracotta/drivers/relational_meta_store.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/terracotta/drivers/relational_meta_store.py b/terracotta/drivers/relational_meta_store.py
index bf5c10ca..794809d3 100644
--- a/terracotta/drivers/relational_meta_store.py
+++ b/terracotta/drivers/relational_meta_store.py
@@ -89,6 +89,7 @@ def __init__(self, path: str) -> None:
             echo=False,
             future=True,
             connect_args={self.SQL_TIMEOUT_KEY: db_connection_timeout},
+            # automatically re-spawn stale connections, see terracotta#266
             pool_pre_ping=True
         )
         self.sqla_metadata = sqla.MetaData()