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https://issues.apache.org/jira/browse/KAFKA-4189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15509565#comment-15509565
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Umesh Chaudhary commented on KAFKA-4189:
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Yep, [Guozhang's
comment|https://issues.apache.org/jira/browse/KAFKA-1894?focusedCommentId=15036256&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15036256]
suggests the same
> 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: 0.9.0.1, 0.10.0.1
> 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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