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KAFKA-6620: Fix documentation about 'exactly_once' 

Reviewers: Matthias J. Sax <matthias@confluent.io>, Guozhang Wang <wangguoz@gmail.com>
This commit is contained in:
Lee Dongjin 2018-09-29 06:41:50 +09:00 committed by Guozhang Wang
parent 0a8205cb45
commit e7b6d65713
2 changed files with 3 additions and 2 deletions
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2
docs/streams/developer-guide/config-streams.html
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@ -452,7 +452,7 @@
and producers are configured with <code class="docutils literal"><span class="pre">retries=Integer.MAX_VALUE</span></code>, <code class="docutils literal"><span class="pre">enable.idempotence=true</span></code>,
and <code class="docutils literal"><span class="pre">max.in.flight.requests.per.connection=1</span></code> per default.
Note that by default exactly-once processing requires a cluster of at least three brokers what is the recommended setting for production.
For development you can change this, by adjusting broker setting <code class="docutils literal"><span class="pre">transaction.state.log.replication.factor</span></code> to the number of broker you want to use.
For development you can change this, by adjusting broker setting <code class="docutils literal"><span class="pre">transaction.state.log.replication.factor</span></code> and <code class="docutils literal"><span class="pre">transaction.state.log.min.isr</span></code> to the number of broker you want to use.
For more details see <a href="../core-concepts#streams_processing_guarantee">Processing Guarantees</a>.
</div></blockquote>
</div>

3
streams/src/main/java/org/apache/kafka/streams/StreamsConfig.java
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@ -396,7 +396,8 @@ public class StreamsConfig extends AbstractConfig {
@SuppressWarnings("WeakerAccess")
public static final String PROCESSING_GUARANTEE_CONFIG = "processing.guarantee";
private static final String PROCESSING_GUARANTEE_DOC = "The processing guarantee that should be used. Possible values are <code>" + AT_LEAST_ONCE + "</code> (default) and <code>" + EXACTLY_ONCE + "</code>. " +
"Note that exactly-once processing requires a cluster of at least three brokers by default what is the recommended setting for production; for development you can change this, by adjusting broker setting <code>transaction.state.log.replication.factor</code>.";
"Note that exactly-once processing requires a cluster of at least three brokers by default what is the recommended setting for production; for development you can change this, by adjusting broker setting " +
"<code>transaction.state.log.replication.factor</code> and <code>transaction.state.log.min.isr</code>.";
/** {@code receive.buffer.bytes} */
@SuppressWarnings("WeakerAccess")