Axon-3.3.2 - Error configuring Mongo as Event Store

Imported from Google Groups
1

I started building simple example with Axon, using Mongo as EventStorage.

pom:

<dependency>
   <groupId>org.axonframework</groupId>
   <artifactId>axon-spring-boot-starter</artifactId>
   <version>3.3.2</version>
</dependency>
<dependency>
   <groupId>org.springframework.data</groupId>
   <artifactId>spring-data-mongodb</artifactId>
   <version>2.0.8.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.data/spring-data-commons -->
<dependency>
   <groupId>org.springframework.data</groupId>
   <artifactId>spring-data-commons</artifactId>
   <version>2.0.8.RELEASE</version>
</dependency>
<dependency>
   <groupId>org.axonframework</groupId>
   <artifactId>axon-mongo</artifactId>
   <version>3.3.2</version>
</dependency>

Exception:

2

Hi,

If you don’t have JPA on the classpath, Axon will not create an EventStorageEngine for you. That same level of automation doesn’t exist for MongoDB, so you’ll have to define a bean of type MongoEventStorageEngine in your application context, yourself.

One it find that bean, Axon will generate the EmbeddedEventStore around this implementation.

Kind regards,

Allard

3

Hi, We are also using Axon Framework with mongodb event store, and my application couldn’t start because of a time out issue while connecting to mongodb servers.

In the same service without axon framework we are able to connect to this mongo instance and add documents to collections. I am not sure may be this is because of the MongoClient. Are may be some dependencies issues. Can i get some help ?

Here is my error stack trace:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘__axon-annotation-command-handler-bean-post-processor’: Cannot resolve reference to bean ‘__axon-parameter-resolver-factory’ while setting bean property ‘parameterResolverFactory’; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘__axon-parameter-resolver-factory’: Invocation of init method failed; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘axonConfig’: Unsatisfied dependency expressed through field ‘eventStore’; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ‘eventBus’ defined in class path resource [org/axonframework/boot/autoconfig/AxonAutoConfiguration.class]: Unsatisfied dependency expressed through method ‘eventStore’ parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘eventStorageEngine’: Invocation of init method failed; nested exception is com.mongodb.MongoTimeoutException: Timed out after 30000 ms while waiting for a server that matches com.mongodb.Mongo$4@283d3628. Client view of cluster state is {type=REPLICA_SET, servers=[{address=serveraddress.local:27020, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketWriteException: Exception sending message}, caused by {javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target}, caused by {sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target}, caused by {sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target}}, {address=serveraddress.local:27020, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketWriteException: Exception sending message}, caused by {javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target}, caused by {sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target}, caused by {sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target}}, {address=serveraddress.local:27020, type=UNKNOWN, state=CONNECTING, exception={com.mongodb.MongoSocketWriteException: Exception sending message}, caused by {javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target}, caused by {sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target}, caused by {sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target}}]

4

Hi,

it seems your problem is at much lower level than Axon or Mongo: SSLHandshakeException. It seems that you’re using an SSL/TLS connection and that your client and server cannot agree on a protocol. This might be because the JVM doesn’t trust the server’s certificate, or maybe there is no SSL in place, while the client expects it.

Cheers,

Allard