Error with Confluent Kafka Azure EventHub Source Connector - apache-kafka

Question

I am trying to consume data from an Azure EventHub to my Confluent Cloud Platform Kafka (installed on an AWS EC2).
However, the Confluent Control Center is telling me that my connector failed upon launching it and reading the log output, I see the following error:
[2021-07-15 21:46:16,362] ERROR WorkerSourceTask{id=EventHubsLinuxMetrics-0} Task threw an uncaught and unrecoverable exception. Task is being killed and will not recover until manually restarted (org.apache.kafka.connect.runtime.WorkerTask:184)
org.apache.kafka.connect.errors.ConnectException: Tolerance exceeded in error handler
at org.apache.kafka.connect.runtime.errors.RetryWithToleranceOperator.execAndHandleError(RetryWithToleranceOperator.java:206)
at org.apache.kafka.connect.runtime.errors.RetryWithToleranceOperator.execute(RetryWithToleranceOperator.java:132)
at org.apache.kafka.connect.runtime.WorkerSourceTask.convertTransformedRecord(WorkerSourceTask.java:290)
at org.apache.kafka.connect.runtime.WorkerSourceTask.sendRecords(WorkerSourceTask.java:319)
at org.apache.kafka.connect.runtime.WorkerSourceTask.execute(WorkerSourceTask.java:249)
at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:182)
at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:231)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: org.apache.kafka.connect.errors.DataException: Found null value for non-optional schema
at io.confluent.connect.avro.AvroData.validateSchemaValue(AvroData.java:1207)
at io.confluent.connect.avro.AvroData.fromConnectData(AvroData.java:389)
at io.confluent.connect.avro.AvroData.fromConnectData(AvroData.java:352)
at io.confluent.connect.avro.AvroConverter.fromConnectData(AvroConverter.java:89)
at org.apache.kafka.connect.storage.Converter.fromConnectData(Converter.java:63)
at org.apache.kafka.connect.runtime.WorkerSourceTask.lambda$convertTransformedRecord$1(WorkerSourceTask.java:290)
at org.apache.kafka.connect.runtime.errors.RetryWithToleranceOperator.execAndRetry(RetryWithToleranceOperator.java:156)
at org.apache.kafka.connect.runtime.errors.RetryWithToleranceOperator.execAndHandleError(RetryWithToleranceOperator.java:190)
The error in questions says: Found null value for non-optional schema.
This is my connector config:
{
"name": "EventhubLinuxMetrics",
"config": {
"confluent.topic.bootstrap.servers": "localhost:9092",
"connector.class": "io.confluent.connect.azure.eventhubs.EventHubsSourceConnector",
"kafka.topic": "linuxMetrics",
"tasks.max": "1",
"azure.eventhubs.sas.keyname": "<censored for security>",
"azure.eventhubs.sas.key": "<censored for security>",
"azure.eventhubs.namespace": "<censored for security>",
"azure.eventhubs.hub.name": "linuxvmmetrics"
}
}
Is there anything wrong with my config? Is localhost:9092 the correct value for the bootstrap.servers field?