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From "huxihx (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (KAFKA-5641) Metadata request should always be allowed to send no regardless of value for max.in.flight.requests.per.connection
Date Wed, 26 Jul 2017 05:44:00 GMT

     [ https://issues.apache.org/jira/browse/KAFKA-5641?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

huxihx updated KAFKA-5641:
--------------------------
    Summary: Metadata request should always be allowed to send no regardless of value for
max.in.flight.requests.per.connection  (was: Metadata request should be allowed to send no
regardless of value for max.in.flight.requests.per.connection)

> Metadata request should always be allowed to send no regardless of value for max.in.flight.requests.per.connection
> ------------------------------------------------------------------------------------------------------------------
>
>                 Key: KAFKA-5641
>                 URL: https://issues.apache.org/jira/browse/KAFKA-5641
>             Project: Kafka
>          Issue Type: Improvement
>          Components: producer 
>    Affects Versions: 0.11.0.0
>            Reporter: huxihx
>
> Metadata request might not be able to be sent when `max.in.flight.requests.per.connection`
is set to 1 and there is already an inflight request in the same node's queue, as show below:
> {code:title=NetworkClient.java|borderStyle=solid}
> private long maybeUpdate(long now, Node node) {
>             String nodeConnectionId = node.idString();
>             if (canSendRequest(nodeConnectionId)) {
>             ......
>             }
> {code}
> However, setting `max.in.flight.requests.per.connection` to 1 actually means no out-of-order
for the produced records, Metadata requests should have no related with this config. We don't
have to check the inflight request's queue size when sending Metadata request.
> [~ijuma] Does it make any sense? If yes, I will work on it.



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