Class io.confluent.connect.avro.AvroConverter could not be found

[renukaradhya]

I am trying to run connect-standalone.bat on windows and getting below error

command:
confluent-3.0.1\bin\windows>connect-standalone.bat ../../etc/schema-registry/connect-avro-standalone.properties ../../etc/kafka-connect-elasticsearch/quickstart-elasticsearch.properties

Exception in thread "main" org.apache.kafka.common.config.ConfigException: Invalid value io.confluent.connect.avro.AvroConverter for configuration value.converter: Class io.confluent.connect.avro.AvroConverter could not be found.
at org.apache.kafka.common.config.ConfigDef.parseType(ConfigDef.java:672)
at org.apache.kafka.common.config.ConfigDef.parse(ConfigDef.java:418)
at org.apache.kafka.common.config.AbstractConfig.(AbstractConfig.java:55)
at org.apache.kafka.common.config.AbstractConfig.(AbstractConfig.java:62)
at org.apache.kafka.connect.runtime.WorkerConfig.(WorkerConfig.java:156)
at org.apache.kafka.connect.runtime.standalone.StandaloneConfig.(StandaloneConfig.java:43)
at org.apache.kafka.connect.cli.ConnectStandalone.main(ConnectStandalone.java:70)

I build new kafka-connect-avro-converter-3.1.0.jar from \schema-registry-master\avro-converter GIT hub code.

I have placed the kafka-connect-avro-converter-3.1.0.jar in confluent-3.0.1\share\java\schema-registry folder before running the connect-standalone.bat

I even tried creating an instance of AvroConverter in separate project but getting below error:
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/kafka/connect/storage/Converter
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at com.targeting.util.MyConverter.main(MyConverter.java:9)
Caused by: java.lang.ClassNotFoundException: org.apache.kafka.connect.storage.Converter
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 13 more

[jcustenborder]

@renukaradhya Just a FYI. We are not currently testing the Confluent platform on windows. The class not found is in core Kafka. In general the server processes for Kafka are only tested on Linux.

[renukaradhya]

Hi,

I am using Confluent Platform on windows and fixed some of the issues and
checked in to GITHUB. Its available in the below link.

https://github.com/renukaradhya/confluentplatform

Basically updated few batch files.

Regards,
Aradhya

On Thu, Oct 13, 2016 at 2:45 AM, Jeremy Custenborder <
notifications@github.com> wrote:

@renukaradhya https://github.com/renukaradhya Just a FYI. We are not
currently testing the Confluent platform on windows. The class not found is
in core Kafka. In general the server processes for Kafka are only tested on
Linux.

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[OneCricketeer]

NoClassDefFoundError: org/apache/kafka/connect/storage/Converter

This is a built-in class with Kafka, and would indicate your classpath for the connect-standalone script was incorrect.

If you still have problems with it, report the problem to Apache Kafka JIRA.

Class io.confluent.connect.avro.AvroConverter could not be found

Nowadays, you should install the Converter from Confluent Hub

https://www.confluent.io/hub/confluentinc/kafka-connect-avro-converter