MongoDB 试图连接到本地主机，为什么？

Question

I am currently developing a Java application connected to a remote MongoDB databse.

I have implemented the authentication methods fallowing the mongo guides:

MongoCredential credential = MongoCredential.createScramSha1Credential(username, credentialDatabase, password.toCharArray());
MongoClient client = new MongoClient(new ServerAddress(hostname, port), Arrays.asList(credential));
mongoDatabase = client.getDatabase(database);

The app connect properly to the database but there is a thing i can't understand.It connects well to the remote server,but I don't know why it try to connect to localhost:27017.

2016-03-07 16:13:29.662  INFO 12507 --- [*.*.*:25015] org.mongodb.driver.connection            : Opened connection [connectionId{localValue:1, serverValue:29}] to *.*.*.*:25015

2016-03-07 16:13:29.687  INFO 12507 --- [*.*.*:25015] org.mongodb.driver.cluster               : Monitor thread successfully connected to server with description ServerDescription{address=*.*.*.*:25015, type=STANDALONE, state=CONNECTED, ok=true, version=ServerVersion{versionList=[3, 2, 3]}, minWireVersion=0, maxWireVersion=4, maxDocumentSize=16777216, roundTripTimeNanos=24485426}


2016-03-07 16:13:30.062  INFO 12507 --- [           main] org.mongodb.driver.cluster               : Cluster created with settings {hosts=[localhost:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500}


2016-03-07 16:13:30.220  INFO 12507 --- [localhost:27017] org.mongodb.driver.cluster               : Exception in monitor thread while connecting to server localhost:27017

com.mongodb.MongoSocketOpenException: Exception opening socket

So, how can I tell it I don't want to connect to localhost ?

Thanks

Answer 1

You can exclude Mongo auto connect/(localhost:27017) by adding below annotation on spring boot Application.java .

@EnableAutoConfiguration(exclude={MongoAutoConfiguration.class})
public class Application {
    // ...
}

Answer 2

I'm not sure if this will help.

If you are using SpringBoot 1.4 and you will not have a bean for MongoClient in the context auto configuration will create MongoClient using default configuration.

@Configuration
---->@ConditionalOnClass(MongoClient.class)<----
@EnableConfigurationProperties(MongoProperties.class)
@ConditionalOnMissingBean(type = "org.springframework.data.mongodb.MongoDbFactory")
public class MongoAutoConfiguration {
...
    @Bean
    ---->@ConditionalOnMissingBean<----
    public MongoClient mongo() throws UnknownHostException {
        this.mongo = this.properties.createMongoClient(this.options, this.environment);
        return this.mongo;
    }
...

So you have 3 options:

1. Exclude auto configuration for mongo.
2. Expose MongoClient as a bean in context.
3. Use default way of configuration for SpringBoot/Mongo and relay on auto configuration to create MongoClient for you: spring.data.mongodb.host= spring.data.mongodb.port= spring.data.mongodb.database= spring.data.mongodb.username= spring.data.mongodb.password=

Answer 3

这是 Spring Boot 的自动配置启动。您可以通过像这样扩展@SpringBootApplication注释来禁用它：

@SpringBootApplication(exclude={MongoAutoConfiguration.class})