Tomas Benc created KAFKA-4189:
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Summary: Consumer poll hangs forever if kafka is disabled
Key: KAFKA-4189
URL: https://issues.apache.org/jira/browse/KAFKA-4189
Project: Kafka
Issue Type: Bug
Components: clients, consumer
Affects Versions: 0.10.0.1, 0.9.0.1
Reporter: Tomas Benc
Priority: Critical
We develop web application, where client sends REST request and our application
downloads messages from Kafka and sends those messages back to client. In our
web application we use "New Consumer API" (not High Level nor Simple Consumer
API).
Problem occurs in case of disabling Kafka and web application is running on.
Application receives request and tries to poll messages from Kafka. Processing
is on that line blocked until Kafka is enabled.
ConsumerRecords<byte[], byte[]> records = consumer.poll(1000);
Timeout parameter of the poll method has no influence in such case. I expect
poll method could throw some Exception describing about connection issues.
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