From 099cc0ba80a518d06da17e88e9d0f38b603691d2 Mon Sep 17 00:00:00 2001
From: August <pin@singularity-data.com>
Date: Fri, 2 Feb 2024 19:09:52 +0800
Subject: [PATCH] fix: force sqlite connection singleton to avoid database lock
 error

---
 src/meta/node/src/server.rs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/meta/node/src/server.rs b/src/meta/node/src/server.rs
index 47dcaf54f264..8fce62c2761e 100644
--- a/src/meta/node/src/server.rs
+++ b/src/meta/node/src/server.rs
@@ -174,9 +174,17 @@ pub async fn rpc_serve(
             )
         }
         MetaStoreBackend::Sql { endpoint } => {
+            let max_connection = if DbBackend::Sqlite.is_prefix_of(&endpoint) {
+                // Due to the fact that Sqlite is prone to the error "(code: 5) database is locked" under concurrent access,
+                // here we forcibly specify the number of connections as 1.
+                1
+            } else {
+                10
+            };
+
             let mut options = sea_orm::ConnectOptions::new(endpoint);
             options
-                .max_connections(20)
+                .max_connections(max_connection)
                 .connect_timeout(Duration::from_secs(10))
                 .idle_timeout(Duration::from_secs(30));
             let conn = sea_orm::Database::connect(options).await?;