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[Question] Elastic Connector - Caused by: java.lang.ClassNotFoundException: com.google.common.collect.ImmutableSet

See original GitHub issue

Hello; I’m trying to install ElasticSearch Connector via Strimzi. My Docker image contains Elastic plugin.

devadmin@vdi-mk2-ubn:~/kafka$ kubectl exec -i kafka-beytepe-kafka-0 -n kafka --  curl -s -XGET http://mssql-minio-connect-cluster-connect-api:8083/connector-plugins|jq '.[].class'
Defaulting container name to kafka.
Use 'kubectl describe pod/kafka-beytepe-kafka-0 -n kafka' to see all of the containers in this pod.
"io.confluent.connect.elasticsearch.ElasticsearchSinkConnector"
"io.confluent.connect.s3.S3SinkConnector"
"io.confluent.connect.storage.tools.SchemaSourceConnector"
"io.debezium.connector.sqlserver.SqlServerConnector"
"org.apache.kafka.connect.file.FileStreamSinkConnector"
"org.apache.kafka.connect.file.FileStreamSourceConnector"
"org.apache.kafka.connect.mirror.MirrorCheckpointConnector"
"org.apache.kafka.connect.mirror.MirrorHeartbeatConnector"
"org.apache.kafka.connect.mirror.MirrorSourceConnector"
"uk.co.threefi.connect.shell.ShellSinkConnector"

…but when I fire up the connector, the following execption is throwed.

`  "name": "elastic-files-connector",
  "connector": {
    "state": "RUNNING",
    "worker_id": "10.244.1.39:8083"
  },
  "tasks": [
    {
      "id": 0,
      "state": "FAILED",
      "worker_id": "10.244.1.39:8083",
      "trace": "java.lang.NoClassDefFoundError: com/google/common/collect/ImmutableSet\n\tat io.searchbox.client.AbstractJestClient.<init>(AbstractJestClient.java:38)\n\tat io.searchbox.client.http.JestHttpClient.<init>(JestHttpClient.java:43)\n\tat io.searchbox.client.JestClientFactory.getObject(JestClientFactory.java:51)\n\tat io.confluent.connect.elasticsearch.jest.JestElasticsearchClient.<init>(JestElasticsearchClient.java:149)\n\tat io.confluent.connect.elasticsearch.jest.JestElasticsearchClient.<init>(JestElasticsearchClient.java:141)\n\tat io.confluent.connect.elasticsearch.ElasticsearchSinkTask.start(ElasticsearchSinkTask.java:122)\n\tat io.confluent.connect.elasticsearch.ElasticsearchSinkTask.start(ElasticsearchSinkTask.java:51)\n\tat org.apache.kafka.connect.runtime.WorkerSinkTask.initializeAndStart(WorkerSinkTask.java:305)\n\tat org.apache.kafka.connect.runtime.WorkerSinkTask.execute(WorkerSinkTask.java:193)\n\tat org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:184)\n\tat org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:234)\n\tat java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)\n\tat java.util.concurrent.FutureTask.run(FutureTask.java:266)\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)\n\tat java.lang.Thread.run(Thread.java:748)\nCaused by: java.lang.ClassNotFoundException: com.google.common.collect.ImmutableSet\n\tat java.net.URLClassLoader.findClass(URLClassLoader.java:382)\n\tat java.lang.ClassLoader.loadClass(ClassLoader.java:418)\n\tat org.apache.kafka.connect.runtime.isolation.PluginClassLoader.loadClass(PluginClassLoader.java:104)\n\tat java.lang.ClassLoader.loadClass(ClassLoader.java:351)\n\t... 16 more\n"
    }
  ],
  "type": "sink"
}`

I think If it’s CLASSPATH issue, the first command wouldn’t list available connector, isn’t it? I need to your help again.

Thanks & Regards

Issue Analytics

State:
Created 3 years ago
Comments:12 (3 by maintainers)

Top GitHub Comments

3reactions

tirelibirefecommented, May 27, 2020

Thank you all guys! Adding missing guava-20.0.jar to /opt/kafka/libs/ at worker node container fixed the problem. My environment is; Strimzi 0.18 Kafka 2.5.0

COPY guava-20.0.jar /opt/kafka/libs/

0reactions

tirelibirefecommented, May 27, 2020

@wtayyeb If you look at my detaily explanation here [https://stackoverflow.com/questions/62015340/elasticsearch-connector-doesnt-work-java-lang-noclassdeffounderror-com-googl](https://stackoverflow.com/questions/62015340/elasticsearch-connector-doesnt-work-java-lang-noclassdeffounderror-com-googl) , I’ve already added guava and also other missing jars to the worker at the same folder with existing jars. It’s sad that it didn’t work.

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