Vert.x mongo examples NoClassDefFoundError

[aleks...@googlemail.com]

Hi,

I was just playing around with the latest vert.x examples, especially the mongo example. Therefore I have downloaded the examples and executed the MongoClientVerticle. Executing the class leads to a NoClassDefFoundError as you can see:

java.lang.NoClassDefFoundError: com/mongodb/connection/StreamFactoryFactory

at com.mongodb.async.client.MongoClientSettings.builder(MongoClientSettings.java:69)

at io.vertx.ext.mongo.impl.config.MongoClientOptionsParser.<init>(MongoClientOptionsParser.java:40)

at io.vertx.ext.mongo.impl.MongoClientImpl$MongoHolder.mongo(MongoClientImpl.java:708)

at io.vertx.ext.mongo.impl.MongoClientImpl.<init>(MongoClientImpl.java:77)

at io.vertx.ext.mongo.MongoClient.createShared(MongoClient.java:66)

at io.vertx.examples.mongo.MongoClientVerticle.start(MongoClientVerticle.java:36)

at io.vertx.core.AbstractVerticle.start(AbstractVerticle.java:111)

at io.vertx.core.impl.DeploymentManager.lambda$doDeploy$8(DeploymentManager.java:434)

at io.vertx.core.impl.ContextImpl.lambda$wrapTask$2(ContextImpl.java:316)

at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)

at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:418)

at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:440)

at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:873)

at java.lang.Thread.run(Thread.java:745)

Caused by: java.lang.ClassNotFoundException: com.mongodb.connection.StreamFactoryFactory

at java.net.URLClassLoader.findClass(URLClassLoader.java:381)

at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)

at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

... 14 more

Downgrading to vertx version 3.2.1 leads to a working example. Does somebody have faced the same issue? Or am I doing something wrong?

Regards

Aleks

[Martijn Verburg]

I think that's a bug in the example code, can you raise an issue in Github?

Cheers,
Martijn

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[aleks...@googlemail.com]

Hi Martijn,

thanks for your fast response. Is this bug related only to the examples or also for the implementation? I have created a reproducer, actually it is the same code from the examples with the latest version of vert.x. Executing this reproducer I get the same exception.

Regards,

Aleks

Cheers,
Martijn

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[Martijn Verburg]

Hi Aleks,

Thanks for your reproducer!  Unfortunately it works perfectly for me, no java.lang.NoClassDefFoundError is thrown...

That Interface does exist in the mongodb-driver-core-3.2.2.jar file, can you check in your project whether that's being pulled in?

Cheers,
Martijn

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[aleks...@googlemail.com]

Hi Martin,

thank for testing the reproducer. Actualy the interface does exist, but then it looks to me that somehow my project is corrupt and can not read that interface. I am going to investigate that and let you know.

Cheers,
Martijn

[Martijn Verburg]

clearing any mongo libs from your .m2/repository may help...

Cheers,
Martijn

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[aleks...@googlemail.com]

Hi Martin,

actually this solved the problem. 

Thanks for your fast responses.

SOLVED

Cheers,
Martijn

[Martijn Verburg]

Glad to hear it :-)

Cheers,
Martijn

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