SQLException: database in auto-commit mode

Hi. I use SqlDelight on JVM. A small http backend with a single database connection. When I do almost simultaneous queries I get a weird error.

With 1.3.0 and sqlite jdbc 3.27.2.1 it was: [SQLITE_ERROR] SQL error or missing database (cannot start a transaction within a transaction).

I decided to update SqlDelight and now with 1.4.0 and 3.32.3 (latest releases) I have java.sql.SQLException: database in auto-commit mode. I’m not sure, but seems I’m getting an issue somehow connected with 1706.

It’t not 100% reproducible, 1 time of 3-5 queries.

My guess according to the code that after the first transaction JdbcDriver.kt changes autoCommit value to true and then second query can’t finish it normally.

To be more precise:

• t1 enclosing transaction started
• t2 enclosing transaction started
• t1 commited and JdbcDriver.kt set connection.autoCommit = true in endTransaction method
• t2 commited and SQLiteConnection.java from sqlite-jdbc throws exception as it’s in autoCommit state:

    @Override
    public void commit() throws SQLException {
        checkOpen();
        if (connectionConfig.isAutoCommit())
            throw new SQLException("database in auto-commit mode");
        db.exec("commit;", getAutoCommit());
        db.exec(connectionConfig.transactionPrefix(), getAutoCommit());
    }

Am I wrong that don’t synchronize my queries? I thought database will handle it.

That’s my code

var response: Response? = null
dbHelper.database.transaction {
    response = findSchedulesInternal(userId, uuid, scheduleId) // several select queries inside
}

That’s what I get:

java.sql.SQLException: database in auto-commit mode
	at org.sqlite.SQLiteConnection.commit(SQLiteConnection.java:403)
	at com.squareup.sqldelight.sqlite.driver.JdbcDriver$Transaction.endTransaction(JdbcDriver.kt:96)
	at com.squareup.sqldelight.Transacter$Transaction.endTransaction$runtime(Transacter.kt:113)
	at com.squareup.sqldelight.TransacterImpl.transactionWithWrapper(Transacter.kt:223)
	at com.squareup.sqldelight.TransacterImpl.transaction(Transacter.kt:197)
	at com.squareup.sqldelight.Transacter$DefaultImpls.transaction$default(Transacter.kt:82)
	at com.eventsheep.sdk.event.service.dashboard.scheduleItem.FindScheduleItemService.findByScheduleId-NF5XIXo(FindScheduleItemService.kt:33)
    …

[melnikovdv]

Hi, @AlecStrong.

According to this issue it seems nobody uses SqlDelight within JVM except me) I’d like to use it in the production, but this bug ruins everything. I tried to look into the code, but it’s not so obvious without some expertise.

Could you look into the issue again?

[AlecStrong]

thank you! I will take a look