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https://issues.apache.org/jira/browse/KAFKA-8315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16833088#comment-16833088
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Andrew commented on KAFKA-8315:
-------------------------------
Ive attached my code:
* I have logging in the ValueJoiner so I can see that joins do not occur
before the period mentioned
* The ValueJoiner is very simply setting the entire left and right
GenericRecord objects to a parent GenericRecord e.g.
{Code}
final GenericRecord record = new GenericData.Record(this.schema);
record.put(IS_UPDATED_FIELD, isUpdated); record.put(LEFT_VALUE_FIELD,
leftRecord);
record.put(RIGHT_VALUE_FIELD, rightRecord);return record;
{Code}
* I have maybe an unusual transform on line 33, which ensures that the joined
record always has the timestamp of the left record. This is important for the
aggregation phase.
> Cannot pass Materialized into a join operation - hence cant set retention
> period independent of grace
> -----------------------------------------------------------------------------------------------------
>
> Key: KAFKA-8315
> URL: https://issues.apache.org/jira/browse/KAFKA-8315
> Project: Kafka
> Issue Type: Bug
> Reporter: Andrew
> Assignee: John Roesler
> Priority: Major
> Attachments: code.java
>
>
> The documentation says to use `Materialized` not `JoinWindows.until()`
> ([https://kafka.apache.org/22/javadoc/org/apache/kafka/streams/kstream/JoinWindows.html#until-long-]),
> but there is no where to pass a `Materialized` instance to the join
> operation, only to the group operation is supported it seems.
>
> Slack conversation here :
> [https://confluentcommunity.slack.com/archives/C48AHTCUQ/p1556799561287300]
> [Additional]
> From what I understand, the retention period should be independent of the
> grace period, so I think this is more than a documentation fix (see comments
> below)
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