Backport to branch(3) : WIth the JDBC transaction manager, use the storage default transaction isolation level instead of SERIALIZABLE (#3080)

feeblefakie · Torch3333 · web-flow · commit a38bf9b540d1 · 2025-10-22T09:29:09.000+09:00
Co-authored-by: Vincent Guilpain &lt;vincent.guilpain@scalar-labs.com&gt;
diff --git a/core/src/main/java/com/scalar/db/storage/jdbc/JdbcUtils.java b/core/src/main/java/com/scalar/db/storage/jdbc/JdbcUtils.java
@@ -36,8 +36,6 @@ public static BasicDataSource initDataSource(
     if (transactional) {
       dataSource.setDefaultAutoCommit(false);
       dataSource.setAutoCommitOnReturn(false);
-      // if transactional, the default isolation level is SERIALIZABLE
-      dataSource.setDefaultTransactionIsolation(Connection.TRANSACTION_SERIALIZABLE);
     }
 
     config

Original file line number	Diff line number	Diff line change
`@@ -36,8 +36,6 @@ public static BasicDataSource initDataSource(`
`36`	`36`	`if (transactional) {`
`37`	`37`	`dataSource.setDefaultAutoCommit(false);`
`38`	`38`	`dataSource.setAutoCommitOnReturn(false);`
`39`		`- // if transactional, the default isolation level is SERIALIZABLE`
`40`		`- dataSource.setDefaultTransactionIsolation(Connection.TRANSACTION_SERIALIZABLE);`
`41`	`39`	`}`
`42`	`40`
`43`	`41`	`config`