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https://issues.apache.org/jira/browse/KAFKA-6148?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ewen Cheslack-Postava updated KAFKA-6148:
-----------------------------------------
    Summary: ClassCastException in BigQuery connector  (was: ERROR Commit of 
WorkerSinkTask{id=bigquery-connector-log-0} offsets threw an unexpected 
exception:  (org.apache.kafka.connect.runtime.WorkerSinkTask:205) 
java.lang.ClassCastException: 
org.apache.kafka.clients.consumer.OffsetAndMetadata cannot be cast)

> ClassCastException in BigQuery connector
> ----------------------------------------
>
>                 Key: KAFKA-6148
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6148
>             Project: Kafka
>          Issue Type: Bug
>          Components: KafkaConnect
>            Reporter: Eugene Burd
>            Priority: Major
>
> I am trying to run a com.wepay.kafka.connect.bigquery.BigQuerySinkConnector 
> connector, but getting the following exception.  
> [2017-10-30 21:48:49,007] ERROR WorkerSinkTask{id=bigquery-connector-log-0} 
> Offset commit failed, rewinding to last committed offsets 
> (org.apache.kafka.connect.runtime.WorkerSinkTask:311)
> java.lang.ClassCastException: 
> org.apache.kafka.clients.consumer.OffsetAndMetadata cannot be cast to 
> org.apache.kafka.clients.consumer.OffsetAndMetadata
>       at 
> com.wepay.kafka.connect.bigquery.BigQuerySinkTask.updateOffsets(BigQuerySinkTask.java:107)
>       at 
> com.wepay.kafka.connect.bigquery.BigQuerySinkTask.flush(BigQuerySinkTask.java:96)
>       at org.apache.kafka.connect.sink.SinkTask.preCommit(SinkTask.java:117)
>       at 
> org.apache.kafka.connect.runtime.WorkerSinkTask.commitOffsets(WorkerSinkTask.java:305)
>       at 
> org.apache.kafka.connect.runtime.WorkerSinkTask.iteration(WorkerSinkTask.java:164)
>       at 
> org.apache.kafka.connect.runtime.WorkerSinkTask.execute(WorkerSinkTask.java:148)
>       at 
> org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:146)
>       at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:190)
>       at 
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>       at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>       at java.lang.Thread.run(Thread.java:748)
> [2017-10-30 21:48:49,012] ERROR Commit of 
> WorkerSinkTask{id=bigquery-connector-log-0} offsets threw an unexpected 
> exception:  (org.apache.kafka.connect.runtime.WorkerSinkTask:205)
> java.lang.ClassCastException: 
> org.apache.kafka.clients.consumer.OffsetAndMetadata cannot be cast to 
> org.apache.kafka.clients.consumer.OffsetAndMetadata
>       at 
> com.wepay.kafka.connect.bigquery.BigQuerySinkTask.updateOffsets(BigQuerySinkTask.java:107)
>       at 
> com.wepay.kafka.connect.bigquery.BigQuerySinkTask.flush(BigQuerySinkTask.java:96)
>       at org.apache.kafka.connect.sink.SinkTask.preCommit(SinkTask.java:117)
>       at 
> org.apache.kafka.connect.runtime.WorkerSinkTask.commitOffsets(WorkerSinkTask.java:305)
>       at 
> org.apache.kafka.connect.runtime.WorkerSinkTask.iteration(WorkerSinkTask.java:164)
>       at 
> org.apache.kafka.connect.runtime.WorkerSinkTask.execute(WorkerSinkTask.java:148)
>       at 
> org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:146)
>       at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:190)
>       at 
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
>       at java.util.concurrent.FutureTask.run(FutureTask.java:266)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
>       at java.lang.Thread.run(Thread.java:748)
> I have checked the version number of kafka client in the plug in and kafka 
> connect itself and they are the same.  
> - kafka-clients-0.11.0.0.jar matches
> I am still suspecting a type of versioning issue.  Do you have any advice? 
> Thanks. 



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