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farmdawgnation / registryless-avro-converter

An avro converter for Kafka Connect without a Schema Registry
Apache License 2.0
53 stars 21 forks source link

Getting java.lang.NoClassDefFoundError: org/apache/avro/io/DatumWriter error #10

Closed sivapolisetty closed 1 year ago

sivapolisetty commented 4 years ago

Hi .

Please help in understand how to run this. I kept kafka-connect-jdbc-5.5.1.jar, postgresql-42.2.10.jar and registryless-avro-converter-1.10.0.jar in plugins folder. I am running "connect-standalone.sh worker-local.properties postgres-sink-connector-local.properties".

I am getting following error ERROR Stopping due to error (org.apache.kafka.connect.cli.ConnectStandalone:130) java.lang.NoClassDefFoundError: org/apache/avro/io/DatumWriter at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:348) at org.apache.kafka.common.config.ConfigDef.parseType(ConfigDef.java:719) at org.apache.kafka.common.config.ConfigDef.parseValue(ConfigDef.java:474) at org.apache.kafka.common.config.ConfigDef.parse(ConfigDef.java:467) at org.apache.kafka.common.config.AbstractConfig.(AbstractConfig.java:108) at org.apache.kafka.common.config.AbstractConfig.(AbstractConfig.java:129) at org.apache.kafka.connect.runtime.WorkerConfig.(WorkerConfig.java:399) at org.apache.kafka.connect.runtime.standalone.StandaloneConfig.(StandaloneConfig.java:42) at org.apache.kafka.connect.cli.ConnectStandalone.main(ConnectStandalone.java:81) Caused by: java.lang.ClassNotFoundException: org.apache.avro.io.DatumWriter at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at org.apache.kafka.connect.runtime.isolation.PluginClassLoader.loadClass(PluginClassLoader.java:104) at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

farmdawgnation commented 4 years ago

Hi there,

This plugin requires the Confluent Avro Converter to also be on the class path. We leverage some shared code. Can you ensure you have a copy of that in your plug-ins folder?

realradical commented 2 years ago

i put both registryless converter jar and Avro Converter in plugin folder. getting the same error

rgthorn commented 2 years ago

Hi, we got this working by adding the jar file to the CLASSPATH variable.