Remove Default Localhost from Spring Data Mongo - mongodb

Question

PROBLEM
Springboot application tries to connect local Mongo instead of a remote one.
RESEARCH
A simple example application.
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.5</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>mongo-test</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>mongo-test</name>
<description>mongo-test</description>
<properties>
<java.version>11</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-mongodb-reactive</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.projectreactor</groupId>
<artifactId>reactor-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
Application.java class
package com.example.mongotest;
import com.mongodb.ConnectionString;
import com.mongodb.MongoClientSettings;
import com.mongodb.connection.netty.NettyStreamFactoryFactory;
import com.mongodb.reactivestreams.client.MongoClient;
import com.mongodb.reactivestreams.client.MongoClients;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.data.mongo.MongoDataAutoConfiguration;
import org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.data.mongodb.config.AbstractReactiveMongoConfiguration;
import org.springframework.data.mongodb.core.ReactiveMongoClientFactoryBean;
import org.springframework.data.mongodb.repository.config.EnableReactiveMongoRepositories;
#EnableReactiveMongoRepositories
#SpringBootApplication
public class MongoTestApplication extends AbstractReactiveMongoConfiguration {
public static void main(String[] args) {
SpringApplication.run(MongoTestApplication.class, args);
}
#Bean
public MongoClient mongoClient() {
return Clients.create(
"mongodb://user:password#11.111.111.110:27017/database?authSource=admin");
}
#Override
protected String getDatabaseName() {
return "database";
}
}
Logs:
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.5.5)
2021-10-06 14:51:54.302 INFO 1034758 --- [ restartedMain] c.e.mongotest.MongoTestApplication : Starting MongoTestApplication using Java 11.0.10
2021-10-06 14:51:54.303 INFO 1034758 --- [ restartedMain] c.e.mongotest.MongoTestApplication : No active profile set, falling back to default profiles: default
2021-10-06 14:51:54.465 INFO 1034758 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data Reactive MongoDB repositories in DEFAULT mode.
2021-10-06 14:51:54.493 INFO 1034758 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 26 ms. Found 2 Reactive MongoDB repository interfaces.
2021-10-06 14:51:54.706 INFO 1034758 --- [ restartedMain] org.mongodb.driver.cluster : Cluster created with settings {hosts=[11.111.111.11:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms'}
2021-10-06 14:51:54.719 INFO 1034758 --- [ restartedMain] org.mongodb.driver.cluster : Cluster created with settings {hosts=[127.0.0.1:27017], mode=SINGLE, requiredClusterType=UNKNOWN, serverSelectionTimeout='30000 ms'}
2021-10-06 14:51:54.725 INFO 1034758 --- [127.0.0.1:27017] org.mongodb.driver.cluster : Exception in monitor thread while connecting to server 127.0.0.1:27017
com.mongodb.MongoSocketOpenException: Exception opening socket
at com.mongodb.internal.connection.AsynchronousSocketChannelStream$OpenCompletionHandler.failed(AsynchronousSocketChannelStream.java:124) ~[mongodb-driver-core-4.2.3.jar:na]
at java.base/sun.nio.ch.Invoker.invokeUnchecked(Invoker.java:129) ~[na:na]
at java.base/sun.nio.ch.Invoker$2.run(Invoker.java:219) ~[na:na]
at java.base/sun.nio.ch.AsynchronousChannelGroupImpl$1.run(AsynchronousChannelGroupImpl.java:112) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]
Caused by: java.net.ConnectException: Connection is refused
at java.base/sun.nio.ch.UnixAsynchronousSocketChannelImpl.checkConnect(Native Method) ~[na:na]
at java.base/sun.nio.ch.UnixAsynchronousSocketChannelImpl.finishConnect(UnixAsynchronousSocketChannelImpl.java:252) ~[na:na]
at java.base/sun.nio.ch.UnixAsynchronousSocketChannelImpl.finish(UnixAsynchronousSocketChannelImpl.java:198) ~[na:na]
at java.base/sun.nio.ch.UnixAsynchronousSocketChannelImpl.onEvent(UnixAsynchronousSocketChannelImpl.java:213) ~[na:na]
at java.base/sun.nio.ch.EPollPort$EventHandlerTask.run(EPollPort.java:306) ~[na:na]
... 1 common frames omitted
2021-10-06 14:51:54.782 INFO 1034758 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2021-10-06 14:51:54.980 INFO 1034758 --- [ restartedMain] o.s.b.web.embedded.netty.NettyWebServer : Netty started on port 8080
2021-10-06 14:51:54.986 INFO 1034758 --- [ restartedMain] c.e.mongotest.MongoTestApplication : Started MongoTestApplication in 0.819 seconds (JVM running for 1.152)
2021-10-06 14:51:55.451 INFO 1034758 --- [22.222.22:27017] org.mongodb.driver.connection : Opened connection [connectionId{localValue:1, serverValue:289157}] to 11.111.111.11:27017
2021-10-06 14:51:55.451 INFO 1034758 --- [22.222.22:27017] org.mongodb.driver.connection : Opened connection [connectionId{localValue:2, serverValue:289158}] to 11.111.111.11:27017
2021-10-06 14:51:55.451 INFO 1034758 --- [22.222.22:27017] org.mongodb.driver.cluster : Monitor thread successfully connected to server with description ServerDescription{address=11.111.111.11:27017, type=STANDALONE, state=CONNECTED, ok=true, minWireVersion=0, maxWireVersion=9, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=325549357}
QUESTION
I don't want to connect local MongoDb on 127.0.0.1. I want to connect 11.111.111.11 remote MongoDb. How to setup the Spring Data Mongo Application to NOT connect 127.0.0.1?

Answer 1

The root cause was finally fixed. Although I have tried to disable various autoconfigurations:
#SpringBootApplication(
exclude = {
MongoAutoConfiguration.class,
MongoReactiveAutoConfiguration.class,
MongoDataAutoConfiguration.class,
EmbeddedMongoAutoConfiguration.class
})
this was not necessary as calling 127.0.0.1 originated from an AbstractReactiveMongoConfiguration class I had to remove:
public class MongoTestApplication extends AbstractReactiveMongoConfiguration {}