yuqi1129 commented on code in PR #6432:
URL: https://github.com/apache/gravitino/pull/6432#discussion_r1969408451
##########
integration-test-common/src/test/java/org/apache/gravitino/integration/test/container/MySQLContainer.java:
##########
@@ -119,6 +119,14 @@ public void createDatabase(TestDatabaseName
testDatabaseName) {
StringUtils.substring(
getJdbcUrl(testDatabaseName), 0,
getJdbcUrl(testDatabaseName).lastIndexOf("/"));
+ // Fix https://github.com/apache/gravitino/issues/6392, MYSQL JDBC driver
may not load
+ // automatically.
+ try {
+ Class.forName("com.mysql.jdbc.Driver");
Review Comment:
> Do we have similar issue when used in the real scenario, or it only
happens in the UT?
I believe this could happen in real scenario if do do the following steps
```
// This steps will load JDBC drivers in `IsolatedClientLoader` and can't
reuse these drivers in App class loader
1. getSparkSession().sql(query).collectAsList();
// Get MySQL connection in the App classloader
2. DriverManager.getConnection()
```
@FANNG1 Please also help to confirm it.
> Why do we only meet this issue in Spark 3.3 test, not in other Spark
module test, and not happened previously?
This will also happen in `Spark 3.4` and I can reproduce it locally
<img width="1565" alt="image"
src="https://github.com/user-attachments/assets/3e6eb4db-9638-47c9-b87a-52fd822de7a4";
/>
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