Re: java.lang.NoClassDefFoundError for Keys Class

[Madhire, Naveen]

Its working now. Thanks Robert and Stephan.

From: Robert Metzger <rmetz...@apache.org<mailto:rmetz...@apache.org>>
Reply-To: "user@flink.apache.org<mailto:user@flink.apache.org>" 
<user@flink.apache.org<mailto:user@flink.apache.org>>
Date: Friday, March 4, 2016 at 1:09 PM
To: "user@flink.apache.org<mailto:user@flink.apache.org>" 
<user@flink.apache.org<mailto:user@flink.apache.org>>
Subject: Re: java.lang.NoClassDefFoundError for Keys Class

The problem is probably this dependency:


 <dependency>
      <groupId>org.apache.kafka</groupId>
      <artifactId>kafka_2.9.1</artifactId>
      <version>0.8.2.0</version>
   </dependency>


Since it pulls Scala 2.9. You can probably remove this dependency because our 
kafka connector will also pull also that kafka dependency.

On Fri, Mar 4, 2016 at 8:07 PM, Madhire, Naveen 
<naveen.madh...@capitalone.com<mailto:naveen.madh...@capitalone.com>> wrote:
Here it is,


<properties>
  <flink.version>1.0.0</flink.version>
</properties>

<repositories>
  <repository>
    <id>apacherelease</id>
    <name>Apache release</name>
    
<url>https://repository.apache.org/content/repositories/orgapacheflink-1069/</url>
    <releases>
      <enabled>true</enabled>
    </releases>
    <snapshots>
      <enabled>false</enabled>
    </snapshots>
  </repository>
</repositories>

<dependencies>
   <dependency>
      <groupId>org.apache.kafka</groupId>
      <artifactId>kafka_2.9.1</artifactId>
      <version>0.8.2.0</version>
   </dependency>
  <dependency>
    <groupId>commons-configuration</groupId>
    <artifactId>commons-configuration</artifactId>
    <version>1.10</version>
  </dependency>
  <dependency>
    <groupId>org.apache.flink</groupId>
    <artifactId>flink-connector-kafka-0.8_2.10</artifactId>
    <version>${flink.version}</version>
  </dependency>
  <dependency>
    <groupId>org.apache.flink</groupId>
    <artifactId>flink-java</artifactId>
    <version>${flink.version}</version>
  </dependency>
  <dependency>
    <groupId>org.apache.flink</groupId>
    <artifactId>flink-clients_2.10</artifactId>
    <version>${flink.version}</version>
  </dependency>
  <dependency>
    <groupId>org.apache.flink</groupId>
    <artifactId>flink-streaming-java_2.10</artifactId>
    <version>${flink.version}</version>
  </dependency>
  <dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.12</version>
  </dependency>
  <dependency>
    <groupId>info.batey.kafka</groupId>
    <artifactId>kafka-unit</artifactId>
    <version>0.2</version>
  </dependency>
</dependencies>

Thanks,
Naveen

From: <ewenstep...@gmail.com<mailto:ewenstep...@gmail.com>> on behalf of 
Stephan Ewen <se...@apache.org<mailto:se...@apache.org>>
Reply-To: "user@flink.apache.org<mailto:user@flink.apache.org>" 
<user@flink.apache.org<mailto:user@flink.apache.org>>
Date: Friday, March 4, 2016 at 12:44 PM

To: "user@flink.apache.org<mailto:user@flink.apache.org>" 
<user@flink.apache.org<mailto:user@flink.apache.org>>
Subject: Re: java.lang.NoClassDefFoundError for Keys Class

Hi!

You actually don't need an extra Akka or Scala dependency.

My suspicion is that you have still some incorrect artifact in the 
dependencies. Good thing is that these problems disappear when you can 
reference a stable release.

Is it possible for you to share the complete dependency section of your project?

Thanks,
Stephan


On Fri, Mar 4, 2016 at 7:34 PM, Madhire, Naveen 
<naveen.madh...@capitalone.com<mailto:naveen.madh...@capitalone.com>> wrote:
Thanks Stephan. I am using the new dependencies from the 1.0.0 release 
candidate.

Now, my application is failing with the below error,

java.lang.NoClassDefFoundError: scala/concurrent/ExecutionContext

The error is here,

https://github.com/apache/flink/blob/b54499b1cf6d14d01e448ea9ce8edabaaba83929/flink-streaming-java/src/main/java/org/apache/flink/streaming/api/environment/LocalStreamEnvironment.java#L104

Do I need to include any specific Scala or Akka dependency?


Thanks,
Naveen


From: <ewenstep...@gmail.com<mailto:ewenstep...@gmail.com>> on behalf of 
Stephan Ewen <se...@apache.org<mailto:se...@apache.org>>
Reply-To: "user@flink.apache.org<mailto:user@flink.apache.org>" 
<user@flink.apache.org<mailto:user@flink.apache.org>>
Date: Thursday, March 3, 2016 at 3:49 PM
To: "user@flink.apache.org<mailto:user@flink.apache.org>" 
<user@flink.apache.org<mailto:user@flink.apache.org>>
Subject: Re: java.lang.NoClassDefFoundError for Keys Class

Hi!

You are using some outdated dependencies. Now, all Scala-dependent Flink 
artifacts include the Scala Version Suffix (following common conventions)

Please substitute:
  - flink-streaming-java--> flink-streaming-java_2.10
  - flink-clients --> flink-clients_2.10
  - flink-connector-kafka --> flink-connector-kafka-0.8_2.10

That should do it.

FYI:  You can also try to use the latest release candidate, described here: 
http://apache-flink-mailing-list-archive.1008284.n3.nabble.com/VOTE-Release-Apache-Flink-1-0-0-RC5-td10628.html

Greetings,
Stephan


On Thu, Mar 3, 2016 at 10:01 PM, Madhire, Naveen 
<naveen.madh...@capitalone.com<mailto:naveen.madh...@capitalone.com>> wrote:

Hey All,

I am getting the below error while executing a simple Kafka-Flink Application.


java.lang.NoClassDefFoundError: org/apache/flink/api/java/operators/Keys




Below are the maven dependencies which I included in my application.



<dependency>
   <groupId>org.apache.kafka</groupId>
   <artifactId>kafka_2.9.1</artifactId>
   <version>0.8.2.0</version>
</dependency>
 <dependency>
   <groupId>commons-configuration</groupId>
   <artifactId>commons-configuration</artifactId>
   <version>1.10</version>
 </dependency>
 <dependency>
   <groupId>org.apache.flink</groupId>
   <artifactId>flink-connector-kafka</artifactId>
   <version>1.0-SNAPSHOT</version>
 </dependency>
 <dependency>
   <groupId>org.apache.flink</groupId>
   <artifactId>flink-java</artifactId>
   <version>1.0-SNAPSHOT</version>
 </dependency>
 <dependency>
   <groupId>org.apache.flink</groupId>
   <artifactId>flink-clients</artifactId>
   <version>1.0-SNAPSHOT</version>
 </dependency>
 <dependency>
   <groupId>org.apache.flink</groupId>
   <artifactId>flink-streaming-java</artifactId>
   <version>1.0-SNAPSHOT</version>
 </dependency>
 <dependency>
   <groupId>junit</groupId>
   <artifactId>junit</artifactId>
   <version>4.12</version>
 </dependency>



I checked the Flink source and couldn’t find the 
org.apache.flink.api.java.operators.Keys class.

I found org.apache.flink.api.common.operators.Keys instead. Is there any other 
Flink dependency which I am missing?



Thanks,

Naveen



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________________________________

The information contained in this e-mail is confidential and/or proprietary to 
Capital One and/or its affiliates and may only be used solely in performance of 
work or services for Capital One. The information transmitted herewith is 
intended only for use by the individual or entity to which it is addressed. If 
the reader of this message is not the intended recipient, you are hereby 
notified that any review, retransmission, dissemination, distribution, copying 
or other use of, or taking of any action in reliance upon this information is 
strictly prohibited. If you have received this communication in error, please 
contact the sender and delete the material from your computer.


________________________________

The information contained in this e-mail is confidential and/or proprietary to 
Capital One and/or its affiliates and may only be used solely in performance of 
work or services for Capital One. The information transmitted herewith is 
intended only for use by the individual or entity to which it is addressed. If 
the reader of this message is not the intended recipient, you are hereby 
notified that any review, retransmission, dissemination, distribution, copying 
or other use of, or taking of any action in reliance upon this information is 
strictly prohibited. If you have received this communication in error, please 
contact the sender and delete the material from your computer.

________________________________________________________

The information contained in this e-mail is confidential and/or proprietary to 
Capital One and/or its affiliates and may only be used solely in performance of 
work or services for Capital One. The information transmitted herewith is 
intended only for use by the individual or entity to which it is addressed. If 
the reader of this message is not the intended recipient, you are hereby 
notified that any review, retransmission, dissemination, distribution, copying 
or other use of, or taking of any action in reliance upon this information is 
strictly prohibited. If you have received this communication in error, please 
contact the sender and delete the material from your computer.