# Sql schema version compatibility check failed connection timed out

**URL:** https://community.temporal.io/t/sql-schema-version-compatibility-check-failed-connection-timed-out/11261
**Category:** Community Support
**Created:** [March 6, 2024, 12:10pm UTC](https://community.temporal.io/t/sql-schema-version-compatibility-check-failed-connection-timed-out/11261 "2024-03-06T12:10:42Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![vaseem\_t](https://sea2.discourse-cdn.com/flex016/user_avatar/community.temporal.io/vaseem_t/32/5048_2.png) [@vaseem\_t](https://community.temporal.io/u/vaseem_t)
#### Post date: [March 6, 2024, 12:10pm UTC](https://community.temporal.io/t/sql-schema-version-compatibility-check-failed-connection-timed-out/11261/1 "2024-03-06T12:10:42Z")

</div>

We are running a Temporal cluster on AWS ECS with MySQL running on an RDS instance. We are encountering the following error, causing components such as the Temporal frontend and history to restart.

```auto
Fx] ERROR Failed to initialize custom logger: could not build arguments for function "go.uber.org/fx".(*App).constructCustomLogger.func2
        /go/pkg/mod/go.uber.org/fx@v1.17.1/app.go:415:
failed to build fxevent.Logger:
could not build arguments for function "go.temporal.io/server/temporal".glob..func8
        /home/builder/temporal/temporal/fx.go:916:
failed to build log.Logger:
received non-nil error from function "go.temporal.io/server/temporal".ServerOptionsProvider
        /home/builder/temporal/temporal/fx.go:163:
sql schema version compatibility check failed: dial tcp 10.0.45.128:3306: connect: connection timed out
[Fx] ERROR Failed to start: could not build arguments for function "go.uber.org/fx".(*App).constructCustomLogger.func2 (/go/pkg/mod/go.uber.org/fx@v1.17.1/app.go:415): failed to build fxevent.Logger: could not build arguments for function "go.temporal.io/server/temporal".glob..func8 (/home/builder/temporal/temporal/fx.go:916): failed to build log.Logger: received non-nil error from function "go.temporal.io/server/temporal".ServerOptionsProvider (/home/builder/temporal/temporal/fx.go:163): sql schema version compatibility check failed: dial tcp 10.0.45.128:3306: connect: connection timed out
Unable to start server. Error: could not build arguments for function "go.uber.org/fx".(*App).constructCustomLogger.func2 (/go/pkg/mod/go.uber.org/fx@v1.17.1/app.go:415): failed to build fxevent.Logger: could not build arguments for function "go.temporal.io/server/temporal".glob..func8 (/home/builder/temporal/temporal/fx.go:916): failed to build log.Logger: received non-nil error from function "go.temporal.io/server/temporal".ServerOptionsProvider (/home/builder/temporal/temporal/fx.go:163): sql schema version compatibility check failed: dial tcp 10.0.45.128:3306: connect: connection timed out

```

can someone please help here?

Temporal cluster version: 1.18.5  
Mysql version : 8.0.35