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https://issues.apache.org/jira/browse/KAFKA-1956?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14322592#comment-14322592
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Hongliang Su commented on KAFKA-1956:
-------------------------------------
[~jkreps]
I understood what you mean. User should use one loop with the "poll" to get the
records.
my client code as follows:
{code}
rt = this.consumer.poll(10000);
if (rt != null && rt.count() > 0) {
Iterable<ConsumerRecord<String, String>> iter = rt.records(tp);
for (ConsumerRecord<String, String> rec : iter) {
try {
System.out.println("consumer: " + rec.topic()
+ " " + rec.offset() + " "
+ rec.partition() + " " + rec.key()
+ " " + rec.value());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
i += rt.count();
}
{code}
Even I set the timeout as long enough, there has no records returned.
And in my opinion, messages exists on the subscribed partitions, and I invoked
the "poll", the records should be returned.
And I tried your client loop code, it really works.
> new consumer client can't fetch records from kafka server
> ---------------------------------------------------------
>
> Key: KAFKA-1956
> URL: https://issues.apache.org/jira/browse/KAFKA-1956
> Project: Kafka
> Issue Type: Bug
> Components: clients, consumer
> Affects Versions: 0.8.3
> Reporter: Hongliang Su
> Assignee: Neha Narkhede
> Labels: patch
> Attachments:
> 0005-fix-new-consumer-client-can-t-fetch-records-from-kaf.patch
>
> Original Estimate: 12h
> Remaining Estimate: 12h
>
> new consumer client can't fetch records from kafka server
> suggestion:
> fetch response doesn't return even after one completeAll invoke
> block until the fetch response returns
> TODO: whether there is an effective way to wait until fetch response returns
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