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https://issues.apache.org/jira/browse/KAFKA-6620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16632572#comment-16632572
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ASF GitHub Bot commented on KAFKA-6620:
---------------------------------------
guozhangwang closed pull request #5434: KAFKA-6620: Documentation about
'exactly_once' doesn't mention 'transaction.state.log.min.isr'
URL: https://github.com/apache/kafka/pull/5434
This is a PR merged from a forked repository.
As GitHub hides the original diff on merge, it is displayed below for
the sake of provenance:
As this is a foreign pull request (from a fork), the diff is supplied
below (as it won't show otherwise due to GitHub magic):
diff --git a/docs/streams/developer-guide/config-streams.html
b/docs/streams/developer-guide/config-streams.html
index 75f1045de14..a2265178759 100644
--- a/docs/streams/developer-guide/config-streams.html
+++ b/docs/streams/developer-guide/config-streams.html
@@ -452,7 +452,7 @@ <h4><a class="toc-backref"
href="#id11">num.stream.threads</a><a class="headerli
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>
diff --git a/streams/src/main/java/org/apache/kafka/streams/StreamsConfig.java
b/streams/src/main/java/org/apache/kafka/streams/StreamsConfig.java
index b9eaaa68f67..06aea215624 100644
--- a/streams/src/main/java/org/apache/kafka/streams/StreamsConfig.java
+++ b/streams/src/main/java/org/apache/kafka/streams/StreamsConfig.java
@@ -391,7 +391,8 @@
@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")
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> Documentation about "exactly_once" doesn't mention
> "transaction.state.log.min.isr"
> -----------------------------------------------------------------------------------
>
> Key: KAFKA-6620
> URL: https://issues.apache.org/jira/browse/KAFKA-6620
> Project: Kafka
> Issue Type: Bug
> Components: documentation, streams
> Reporter: Daniel Qian
> Priority: Major
>
> Documentation about "processing.guarantee" says:
> {quote}The processing guarantee that should be used. Possible values are
> {{at_least_once}}(default) and {{exactly_once}}. 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*
> `{color:#FF0000}*transaction.state.log.replication.factor*{color}`
> {quote}
> If one only set *transaction.state.log.replication.factor=1* but leave
> *transaction.state.log.min.isr* with default value (which is 2) the Streams
> Application will break.
> Hope you guys modify the doc, thanks.
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