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https://issues.apache.org/jira/browse/KAFKA-3177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15127255#comment-15127255
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Jiangjie Qin commented on KAFKA-3177:
-------------------------------------
[~guozhang] In this particular case, the issue is different from the actual no
broker available scenario. Good point about verify the expected behavior of
methods calls.
Also, should we make some improvements on the Exception definition, too?
Currently some exception definition is a little confusing. e.g.
NetworkException is a subclass of InvalidMatadataException; There is a
StaleMetadataException while we already have more specific exception such as
UnknownTopicOrPartitionException, NotLeaderForPartitionException, etc.
> Kafka consumer can hang when position() is called on a non-existing partition.
> ------------------------------------------------------------------------------
>
> Key: KAFKA-3177
> URL: https://issues.apache.org/jira/browse/KAFKA-3177
> Project: Kafka
> Issue Type: Bug
> Components: clients
> Affects Versions: 0.9.0.0
> Reporter: Jiangjie Qin
> Assignee: Jiangjie Qin
> Fix For: 0.9.0.1
>
>
> This can be easily reproduced as following:
> {code}
> {
> ...
> consumer.assign(SomeNonExsitingTopicParition);
> consumer.position();
> ...
> }
> {code}
> It seems when position is called we will try to do the following:
> 1. Fetch committed offsets.
> 2. If there is no committed offsets, try to reset offset using reset
> strategy. in sendListOffsetRequest(), if the consumer does not know the
> TopicPartition, it will refresh its metadata and retry. In this case, because
> the partition does not exist, we fall in to the infinite loop of refreshing
> topic metadata.
> Another orthogonal issue is that if the topic in the above code piece does
> not exist, position() call will actually create the topic due to the fact
> that currently topic metadata request could automatically create the topic.
> This is a known separate issue.
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