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https://issues.apache.org/jira/browse/KAFKA-3982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15390181#comment-15390181
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ASF GitHub Bot commented on KAFKA-3982:
---
GitHub user vahidhashemian opened a pull request:
https://github.com/apache/kafka/pull/1655
KAFKA-3982: Fix processing order of some of the consumer properties
This PR updates processing of console consumer's input properties.
For both old and new consumer, the value provided for `auto.offset.reset`
indirectly through `consumer.config` or `consumer.property` arguments will now
take effect.
For new consumer and for `key.deserializer` and `value.deserializer`
properties, the precedence order is fixed to first the value directly provided
as an argument, then the value provided indirectly via `consumer.property` and
then `consumer.config`, and finally a default value.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/vahidhashemian/kafka KAFKA-3982
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/kafka/pull/1655.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1655
commit 6e112c8d097d55cbd5cd6dd81077180b89f175e3
Author: Vahid Hashemian
Date: 2016-07-22T20:48:59Z
KAFKA-3982: Fix processing order of some of the consumer properties
This PR updates processing of console consumer's input properties.
For both old and new consumer, the value provided for `auto.offset.reset`
indirectly through `consumer.config` or `consumer.property` arguments will now
take effect.
For new consumer and for `key.deserializer` and `value.deserializer`
properties, the precedence is fixed to first the value directly provided as an
argument, then the value provided indirectly via `consumer.property` and then
`consumer.config`, and finally a default value.
> Issue with processing order of consumer properties in console consumer
> --
>
> Key: KAFKA-3982
> URL: https://issues.apache.org/jira/browse/KAFKA-3982
> Project: Kafka
> Issue Type: Bug
> Components: consumer
>Reporter: Vahid Hashemian
>Assignee: Vahid Hashemian
>Priority: Minor
>
> With the recent introduction of {{consumer.property}} argument in console
> consumer, both new and old consumer could overwrite certain properties
> provided using this new argument.
> Specifically, the old consumer would overwrite the values provided for
> [{{auto.offset.reset}}|https://github.com/apache/kafka/blob/10bbffd75439e10fe9db6cf0aa48a7da7e386ef3/core/src/main/scala/kafka/tools/ConsoleConsumer.scala#L173]
> and
> [{{zookeeper.connect}}|https://github.com/apache/kafka/blob/10bbffd75439e10fe9db6cf0aa48a7da7e386ef3/core/src/main/scala/kafka/tools/ConsoleConsumer.scala#L174],
> and the new consumer would overwrite the values provided for
> [{{auto.offset.reset}}|https://github.com/apache/kafka/blob/10bbffd75439e10fe9db6cf0aa48a7da7e386ef3/core/src/main/scala/kafka/tools/ConsoleConsumer.scala#L196],
>
> [{{bootstrap.servers}}|https://github.com/apache/kafka/blob/10bbffd75439e10fe9db6cf0aa48a7da7e386ef3/core/src/main/scala/kafka/tools/ConsoleConsumer.scala#L197],
>
> [{{key.deserializer}}|https://github.com/apache/kafka/blob/10bbffd75439e10fe9db6cf0aa48a7da7e386ef3/core/src/main/scala/kafka/tools/ConsoleConsumer.scala#L198],
> and
> [{{key.deserializer}}|https://github.com/apache/kafka/blob/10bbffd75439e10fe9db6cf0aa48a7da7e386ef3/core/src/main/scala/kafka/tools/ConsoleConsumer.scala#L199].
> For example, running the old consumer as {{bin/kafka-console-consumer.sh
> --zookeeper localhost:2181 --topic foo --consumer-property
> auto.offset.reset=none}} the value that's eventually selected for
> {{auto.offset.reset}} will be {{largest}}, overwriting what the user provides
> in the command line.
> This seems to be because the properties provided via {{consumer.property}}
> argument are not considered when finalizing the configuration of the consumer.
> Some properties can now be provided in three different places (directly in
> the command line, via the {{consumer.property}} argument, and via the
> {{consumer.config}} argument, in the same order of precedence).
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