[SOLVED] SpringBatch : initializing metadatas with MongoDB job repository

I am working on a SpringBatch project that needs to read from an XML and write data into a MongoDB.

I was happily surprised to see that SpringBatch has a brand new job repository support for MongoDB, so I decided to try it.

Unfortunaly I can't figure out how to configure Spring to have the batch metadata automatically initialized with the first start of the batch. I must specify that I don't want an embedded datasource for this batch but an external one to handle the retry process on failure for a potentially long process.

I have been initializing my project with this configuration:

@Bean
public JobLauncher jobLauncher(JobRepository jobRepository) {
    TaskExecutorJobLauncher jobLauncher = new TaskExecutorJobLauncher();
    jobLauncher.setJobRepository(jobRepository);
    return jobLauncher;
}

@Bean
public MongoDatabaseFactory mongoDatabaseFactory(){
    return new SimpleMongoClientDatabaseFactory("<myMongoDBconnectionString>");
}

@Bean
public MongoTemplate mongoTemplate(MongoDatabaseFactory databaseFactory) {
    return new MongoTemplate(databaseFactory);
}

@Bean
public MongoTransactionManager transactionManager(MongoDatabaseFactory databaseFactory) {
    MongoTransactionManager mongoTransactionManager = new MongoTransactionManager();
    mongoTransactionManager.setDatabaseFactory(databaseFactory);
    mongoTransactionManager.afterPropertiesSet();
    return mongoTransactionManager;
}

@Bean
public JobRepository jobRepository(MongoTemplate mongoTemplate, MongoTransactionManager transactionManager) throws Exception {
    MongoJobRepositoryFactoryBean jobRepositoryFactoryBean = new MongoJobRepositoryFactoryBean();
    jobRepositoryFactoryBean.setMongoOperations(mongoTemplate);
    jobRepositoryFactoryBean.setTransactionManager(transactionManager);
    jobRepositoryFactoryBean.afterPropertiesSet();
    return jobRepositoryFactoryBean.getObject();
}

But the when I execute my SpringBatchApplication, I got this exception :

java.lang.NullPointerException: Cannot invoke "org.bson.Document.getLong(Object)" because the return value of "com.mongodb.client.MongoCollection.findOneAndUpdate(org.bson.conversions.Bson, org.bson.conversions.Bson, com.mongodb.client.model.FindOneAndUpdateOptions)" is null
at org.springframework.batch.core.repository.dao.MongoSequenceIncrementer.lambda$nextLongValue$0(MongoSequenceIncrementer.java:51) \~\[spring-batch-core-5.2.1.jar:5.2.1\]
at org.springframework.data.mongodb.core.MongoTemplate.execute(MongoTemplate.java:603) \~\[spring-data-mongodb-4.4.1.jar:4.4.1\]
at org.springframework.batch.core.repository.dao.MongoSequenceIncrementer.nextLongValue(MongoSequenceIncrementer.java:47) \~\[spring-batch-core-5.2.1.jar:5.2.1\]
at org.springframework.batch.core.repository.dao.MongoJobInstanceDao.createJobInstance(MongoJobInstanceDao.java:80) \~\[spring-batch-core-5.2.1.jar:5.2.1\]
at org.springframework.batch.core.repository.support.SimpleJobRepository.createJobExecution(SimpleJobRepository.java:168) \~\[spring-batch-core-5.2.1.jar:5.2.1\]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) \~\[na:na\]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) \~\[na:na\]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) \~\[na:na\]
at java.base/java.lang.reflect.Method.invoke(Method.java:568) \~\[na:na\]
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:359) \~\[spring-aop-6.2.1.jar:6.2.1\]
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:196) \~\[spring-aop-6.2.1.jar:6.2.1\]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) \~\[spring-aop-6.2.1.jar:6.2.1\]
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:380) \~\[spring-tx-6.2.1.jar:6.2.1\]
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:119) \~\[spring-tx-6.2.1.jar:6.2.1\]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184) \~\[spring-aop-6.2.1.jar:6.2.1\]
at org.springframework.batch.core.repository.support.AbstractJobRepositoryFactoryBean.lambda$getObject$0(AbstractJobRepositoryFactoryBean.java:204) \~\[spring-batch-core-5.2.1.jar:5.2.1\]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:184) \~\[spring-aop-6.2.1.jar:6.2.1\]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:223) \~\[spring-aop-6.2.1.jar:6.2.1\]
at jdk.proxy2/jdk.proxy2.$Proxy41.createJobExecution(Unknown Source) \~\[na:na\]
at org.springframework.batch.core.launch.support.TaskExecutorJobLauncher.run(TaskExecutorJobLauncher.java:143) \~\[spring-batch-core-5.2.1.jar:5.2.1\]
at com.docoon.update_annuaire_replica.SpringBatchApplication.run(SpringBatchApplication.java:39) \~\[classes/:na\]

It seems like it is looking for a particular sequence in the metadata collection, but cannot find it beacause the schema haven't been intialized yet. I know that with an SQL configuration this property can be set : spring.main.batch.jdbc.initalize-schema: true

Is there any equivalence for this for a MongoDB config that I am missing ?