[
https://issues.apache.org/jira/browse/KAFKA-8315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16831747#comment-16831747
]
Andrew commented on KAFKA-8315:
-------------------------------
I should also mention my use case from the original slack community
conversation :
I am performing a large historical inner join (2 years) of two streams (using
event time), followed by an aggregation.
For the join, I have : 2 days window into the past only and a grace period of 2
days ( I dont want to accept updates to the aggregation beyond this grace
period).
For the grouped aggregation I have : a tumbling window of 1 second and a grace
of 4 days
For the grouped aggregation if I also set the group retention using
Materialized, I can see that this affects the retention period of the
underlying KSTREAM-AGGREGATE-STATE-STORE topics. This seems to be independent
of the grace period.
However, using `until()` for the JoinWindows does not do the same for the
KSTREAM-JOINTHIS and KSTREAM-JOINOTHER topics, as I would have expected. These
topics always have 120 hours retention period set on the topic.
What I see is that I get no aggregation records other than for the most recent
120 hour period. So the vast majority of my 2 years fails to be
joined/aggregated, and outputs nothing.
> Cannot pass Materialized into a join operation
> ----------------------------------------------
>
> Key: KAFKA-8315
> URL: https://issues.apache.org/jira/browse/KAFKA-8315
> Project: Kafka
> Issue Type: Bug
> Reporter: Andrew
> Assignee: John Roesler
> Priority: Major
>
> 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
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
