Unable to specify/override ReadConcern for transactional ChangeUnits

[Thorsten Vogel]

Description

Unable to create indices in ChangeUnit's @execution methods.
The error message listed below says that the command createIndexes does not support this transaction's readConcern.

The mongo documentation specifies that "To use
createIndexes
in a transaction, the transaction must use read concern "local". If you specify a read concern level other than "local", the transaction fails."

The MongoTransactionManager has been setup with ReadConcern local but this is somehow not considered.

@Bean
MongoTransactionManager transactionManager(MongoTemplate mongoTemplate) {
    TransactionOptions transactionOptions = TransactionOptions.builder()
            .readConcern(ReadConcern.LOCAL)
            .writeConcern(WriteConcern.ACKNOWLEDGED)
            .build();
    return new MongoTransactionManager(mongoTemplate.getMongoDatabaseFactory(), transactionOptions);
}


@Bean
ConnectionDriver connectionDriver(MongoTemplate mongoTemplate) {
    SpringDataMongoV4Driver springDataMongoV4Driver = SpringDataMongoV4Driver.withDefaultLock(mongoTemplate);
    springDataMongoV4Driver.enableTransaction();
    return springDataMongoV4Driver;
}

@Bean
MongockApplicationRunner mongockApplicationRunner(ConnectionDriver driver, ApplicationContext applicationContext) {
    return MongockSpringboot.builder()
            .setDriver(driver)
            .setSpringContext(applicationContext)
            ...
            .addMigrationScanPackages(MIGRATION_PACKAGES)
            .setTransactionEnabled(true)
            .buildApplicationRunner();
}

I was thinking that the TransactionManager is picked up automatically from the Spring context, as i cannot find any setter method for the transactionmanager.

PRIORITY

[CRITICAL]

Version and environment

Mongock

• 5.3.4
• Mockock-SpringBootBuilder

Environment

• Spring Boot 3.1.3, , MongoDB 5.0.14
• Infrastructure: Docker

Steps to Reproduce

1. Setup Mongock to use transactions, i.e. declare MongoTransactionManager und enable transactions in Driver and MongockSpringboot.builder().

2. Create a ChangeUnit that tries to create an Index

Behaviour

Expected behavior: The specified index is created.

Actual behavior: Error message from Mongo-Driver:

com.mongodb.MongoCommandException: Command failed with error 72 (InvalidOptions): 'Command createIndexes does not support this transaction's { readConcern: { level: "majority", provenance: "clientSupplied" } } :: caused by :: read concern not supported' on server mft-kafka-t0011.deutschepost.dpwn.com:27017. The full response is {"ok": 0.0, "errmsg": "Command createIndexes does not support this transaction's { readConcern: { level: \"majority\", provenance: \"clientSupplied\" } } :: caused by :: read concern not supported", "code": 72, "codeName": "InvalidOptions", "$clusterTime": {"clusterTime": {"$timestamp": {"t": 1694598946, "i": 3}}, "signature": {"hash": {"$binary": {"base64": "APP1ec+sC3Qs1BmcFVZVsD/vRdE=", "subType": "00"}}, "keyId": 7232103882782932993}}, "operationTime": {"$timestamp": {"t": 1694598946, "i": 3}}}

How often the bug happens: 100%

[Oliver Santana]

Hello @thorstenvogel , we'll take a look and let you know.

As a workaround you can include index creation within @BeforeExecution method, which is executed with no transactional context (only @Execution method is executed within transaction).

Please take a look to the ChangeUnit's methods documentation here.

Thanks