title: Flapdoodle Embedded Mongo process won't start
body: <p>I'm trying to have an Embedded Mongo instance run while performing my unit tests. I am using the flapdoodle embedded mongo package to achieve this, but getting an error while attempting to start the tests.</p>
  <p>My build.gradle dependencies:</p>
  <pre><code>dependencies {
      implementation 'org.springframework.boot:spring-boot-starter-data-mongodb'
      implementation 'org.springframework.boot:spring-boot-starter-oauth2-resource-server'
      implementation 'org.springframework.boot:spring-boot-starter-web'
      compileOnly 'org.projectlombok:lombok'
      annotationProcessor 'org.projectlombok:lombok'
      testImplementation 'org.springframework.boot:spring-boot-starter-test'
      testImplementation 'de.flapdoodle.embed:de.flapdoodle.embed.mongo:3.3.0'
  }
  </code></pre>
  <p>And the test file:</p>
  <pre><code>@SpringBootTest
  public class UserServiceTest {
  
      @Autowired
      UserServiceImpl userService;
  
      @MockBean
      MongoTemplate mongoTemplate;
  
      @MockBean
      UserRepository userRepository;
  
      @Test
      public void contextLoads() {
          assertThat(userService).isNotNull();
          assertThat(userRepository).isNotNull();
      }
  
      public User getUser(String authId) {
          User user = new User();
          user.setAuth0Id(authId);
          user.setUserImage(&quot;img&quot;);
          user.setEmail(&quot;email@mail.com&quot;);
          user.setName(&quot;User 1&quot;);
          user.setId(&quot;1&quot;);
          return user;
      }
  
      @Test
      public void findByAuth0IdReturnsCorrectly() {
          String id = &quot;helloIamTheId&quot;;
          User user = getUser(id);
          when(userRepository.findByAuth0Id(id)).thenReturn(Optional.of(user));
          assertThat(userService.findByAuth0Id(id)).isEqualTo(Optional.of(user));
      }
  }
  </code></pre>
  <p>The error:</p>
  <pre><code>Caused by: java.lang.RuntimeException: Could not start process: &lt;EOF&gt;
      at de.flapdoodle.embed.mongo.AbstractMongoProcess.onAfterProcessStart(AbstractMongoProcess.java:79) ~[de.flapdoodle.embed.mongo-3.3.0.jar:na]
      at de.flapdoodle.embed.process.runtime.AbstractProcess.&lt;init&gt;(AbstractProcess.java:113) ~[de.flapdoodle.embed.process-3.1.6.jar:na]
      at de.flapdoodle.embed.mongo.AbstractMongoProcess.&lt;init&gt;(AbstractMongoProcess.java:53) ~[de.flapdoodle.embed.mongo-3.3.0.jar:na]
      at de.flapdoodle.embed.mongo.MongodProcess.&lt;init&gt;(MongodProcess.java:50) ~[de.flapdoodle.embed.mongo-3.3.0.jar:na]
      at de.flapdoodle.embed.mongo.MongodExecutable.start(MongodExecutable.java:44) ~[de.flapdoodle.embed.mongo-3.3.0.jar:na]
      at de.flapdoodle.embed.mongo.MongodExecutable.start(MongodExecutable.java:34) ~[de.flapdoodle.embed.mongo-3.3.0.jar:na]
      at de.flapdoodle.embed.process.runtime.Executable.start(Executable.java:109) ~[de.flapdoodle.embed.process-3.1.6.jar:na]
      at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
      at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[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:566) ~[na:na]
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java:1930) ~[spring-beans-5.3.15.jar:5.3.15]
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1872) ~[spring-beans-5.3.15.jar:5.3.15]
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1800) ~[spring-beans-5.3.15.jar:5.3.15]
      ... 100 common frames omitted
  </code></pre>
  <p>Thanks</p>