Add client-side lookup throttling - #182
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We should note here in the javadoc that the default is 5000 and that one should not worry to change this unless you plan to produce/subscribe on 1000s of topics from the same client instance.
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I'd rather keep this at debug level, since it is part of the normal operations flow
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(Let's wait to tag 1.16 release before merging this one)
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Signed-off-by: xiaolong.ran <rxl@apache.org> Fix nil pointer dereference of PartitionMetadataResponse
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fix apache#181 This pull request fix the deadlock in kop.
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Motivation
Sometimes, It is useful to throttle at client in order to avoid large number of concurrent lookup-requests going to broker while creating producers/consumers.
Modifications
Add client side lookup throttling while creating producer and consumer.
Result
Client can have capability to restrict number of concurrent lookup request to broker in order to throttle while creating producer/consumer.