我尝试在springboot项目中设置mongodb。我在application.yml中设置了一个uri:

spring:
  data:
    mongodb:
      uri: mongodb://user:pass@localhost:27017/mydbname

但应用程序无法从存储库中读取数据，出现错误：

Attempt to switch database target during SASL authentication.

发生错误的行（kotlin）：

val emails = emailRepository.findAllByStatus(READY_TO_SEND)

哪里

interface EmailRepository : MongoRepository<Email, String> {
    fun findAllByStatus(status: EmailStatus) : Collection<Email>
}

和

data class Email(
    @Id
    @get:JsonIgnore
    var id: String? = null,
    @get:NotNull
    val from: MailActor,
    @get:NotEmpty
    val to: Collection<MailActor>,
    @get:NotEmpty
    val subject: String,
    @get:NotEmpty
    val htmlText: String,
    val attachments: Collection<Attachment> = listOf(),
    val cc: Collection<MailActor> = listOf(),
    val bcc: Collection<MailActor> = listOf(),
    @get:JsonIgnore
    val status: EmailStatus = EmailStatus.READY_TO_SEND,
    @get:JsonIgnore
    val created: LocalDateTime = LocalDateTime.now(),
    @get:JsonIgnore
    val lastSendAttempt: LocalDateTime? = null,
)

同样的错误也发生在 findAll 以及 save 存储库上的操作（可能还有其他操作）
堆栈跟踪：

Caused by: com.mongodb.MongoSecurityException: Exception authenticating MongoCredential{mechanism=SCRAM-SHA-1, userName='user', source='user', password=<hidden>, mechanismProperties=<hidden>}
    at com.mongodb.internal.connection.SaslAuthenticator.wrapException(SaslAuthenticator.java:235) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.SaslAuthenticator$1.run(SaslAuthenticator.java:80) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.SaslAuthenticator$1.run(SaslAuthenticator.java:51) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.SaslAuthenticator.doAsSubject(SaslAuthenticator.java:241) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.SaslAuthenticator.authenticate(SaslAuthenticator.java:51) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.InternalStreamConnectionInitializer.authenticate(InternalStreamConnectionInitializer.java:168) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.InternalStreamConnectionInitializer.initialize(InternalStreamConnectionInitializer.java:63) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.InternalStreamConnection.open(InternalStreamConnection.java:144) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.UsageTrackingInternalConnection.open(UsageTrackingInternalConnection.java:51) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.DefaultConnectionPool$PooledConnection.open(DefaultConnectionPool.java:431) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.DefaultConnectionPool.get(DefaultConnectionPool.java:115) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.DefaultConnectionPool.get(DefaultConnectionPool.java:100) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.DefaultServer.getConnection(DefaultServer.java:92) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.binding.ClusterBinding$ClusterBindingConnectionSource.getConnection(ClusterBinding.java:119) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.client.internal.ClientSessionBinding$SessionBindingConnectionSource.getConnection(ClientSessionBinding.java:135) ~[mongodb-driver-sync-4.1.1.jar:na]
    at com.mongodb.internal.operation.FindOperation$1.call(FindOperation.java:653) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.operation.FindOperation$1.call(FindOperation.java:650) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.operation.OperationHelper.withReadConnectionSource(OperationHelper.java:582) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.operation.FindOperation.execute(FindOperation.java:650) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.operation.FindOperation.execute(FindOperation.java:78) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.client.internal.MongoClientDelegate$DelegateOperationExecutor.execute(MongoClientDelegate.java:178) ~[mongodb-driver-sync-4.1.1.jar:na]
    at com.mongodb.client.internal.MongoIterableImpl.execute(MongoIterableImpl.java:135) ~[mongodb-driver-sync-4.1.1.jar:na]
    at com.mongodb.client.internal.MongoIterableImpl.iterator(MongoIterableImpl.java:92) ~[mongodb-driver-sync-4.1.1.jar:na]
    at org.springframework.data.mongodb.core.MongoTemplate.executeFindMultiInternal(MongoTemplate.java:2790) ~[spring-data-mongodb-3.1.2.jar:3.1.2]
    ... 33 common frames omitted
Caused by: com.mongodb.MongoCommandException: Command failed with error 17 (ProtocolError): 'Attempt to switch database target during SASL authentication.' on server localhost:27017. The full response is {"ok": 0.0, "errmsg": "Attempt to switch database target during SASL authentication.", "code": 17, "codeName": "ProtocolError"}
    at com.mongodb.internal.connection.ProtocolHelper.getCommandFailureException(ProtocolHelper.java:175) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.InternalStreamConnection.receiveCommandMessageResponse(InternalStreamConnection.java:359) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.InternalStreamConnection.sendAndReceive(InternalStreamConnection.java:280) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.CommandHelper.sendAndReceive(CommandHelper.java:83) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.CommandHelper.executeCommand(CommandHelper.java:33) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.SaslAuthenticator.sendSaslContinue(SaslAuthenticator.java:195) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.SaslAuthenticator.access$200(SaslAuthenticator.java:43) ~[mongodb-driver-core-4.1.1.jar:na]
    at com.mongodb.internal.connection.SaslAuthenticator$1.run(SaslAuthenticator.java:69) ~[mongodb-driver-core-4.1.1.jar:na]
    ... 55 common frames omitted

我可以通过intellij idea客户端以相同的凭据连接到mongo。
我用docker compose运行mongo db

version: '3.1'

services:
  mongodb:
    image: mongo
    container_name: my-service-mongo
    restart: always
    environment:
      MONGO_INITDB_ROOT_USERNAME: user
      MONGO_INITDB_ROOT_PASSWORD: pass
      MONGO_INITDB_DATABASE: mydbname
    ports:
      - 27017:27017
    volumes:
      - ./mongo-init.js:/docker-entrypoint-initdb.d/mongo-init.js:ro

mongo-init.js在哪里

db.createUser(
    {
        user: "user",
        pwd: "pass",
        roles: [
            {
                role: "readWrite",
                db: "mydbname"
            }
        ]
    }
);

怎么回事？在互联网上我唯一发现这个错误信息的地方是。。。mongo源代码8]。
谢谢你的帮助。