[jira] [Commented] (KAFKA-10417) suppress() with cogroup() throws ClassCastException
[
https://issues.apache.org/jira/browse/KAFKA-10417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17243023#comment-17243023
]
Christian Duvholt commented on KAFKA-10417:
---
[~lct45] unfortunately I'm not able to work on this now so feel free to pick it
up.
> suppress() with cogroup() throws ClassCastException
> ---
>
> Key: KAFKA-10417
> URL: https://issues.apache.org/jira/browse/KAFKA-10417
> Project: Kafka
> Issue Type: Bug
> Components: streams
>Affects Versions: 2.6.0
>Reporter: Wardha Perinkada Kattu
>Priority: Critical
> Labels: kafka-streams
> Fix For: 2.8.0, 2.7.1
>
>
> Streams operation - `cogroup()`, `aggregate()` followed by `suppress()`
> throws `ClassCastException`
> Works fine without the `suppress()`
> Code block tested -
> {code:java}
> val stream1 = requestStreams.merge(successStreams).merge(errorStreams)
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.notificationSerde()))
> val streams2 = confirmationStreams
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.confirmationsSerde()))
> val cogrouped =
> stream1.cogroup(notificationAggregator).cogroup(streams2,
> confirmationsAggregator)
>
> .windowedBy(TimeWindows.of(Duration.ofMinutes(notificationStreamsConfig.joinWindowMinutes.toLong())).grace(Duration.ofMinutes(notificationStreamsConfig.graceDurationMinutes.toLong(
> .aggregate({ null }, Materialized.`as` NotificationMetric, WindowStore ByteArray>>("time-windowed-aggregated-stream-store")
>
> .withValueSerde(serdesConfig.notificationMetricSerde()))
> .suppress(Suppressed.untilWindowCloses(unbounded()))
> .toStream()
> {code}
> Exception thrown is:
> {code:java}
> Caused by: java.lang.ClassCastException: class
> org.apache.kafka.streams.kstream.internals.PassThrough cannot be cast to
> class org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier
> (org.apache.kafka.streams.kstream.internals.PassThrough and
> org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier are in
> unnamed module of loader 'app')
> {code}
> [https://stackoverflow.com/questions/63459685/kgroupedstream-with-cogroup-aggregate-suppress]
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[jira] [Commented] (KAFKA-10417) suppress() with cogroup() throws ClassCastException
[
https://issues.apache.org/jira/browse/KAFKA-10417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17242806#comment-17242806
]
John Roesler commented on KAFKA-10417:
--
Hey [~duvholt] , I'm really sorry I missed your comment. Sadly, there's no
documentation, but the basic point is that some aggregations need to be able to
"subtract" the prior value before "adding" the new value. For this case, it
requests upstream operators to send the old value along with any updates.
> suppress() with cogroup() throws ClassCastException
> ---
>
> Key: KAFKA-10417
> URL: https://issues.apache.org/jira/browse/KAFKA-10417
> Project: Kafka
> Issue Type: Bug
> Components: streams
>Affects Versions: 2.6.0
>Reporter: Wardha Perinkada Kattu
>Priority: Critical
> Labels: kafka-streams
> Fix For: 2.8.0, 2.7.1
>
>
> Streams operation - `cogroup()`, `aggregate()` followed by `suppress()`
> throws `ClassCastException`
> Works fine without the `suppress()`
> Code block tested -
> {code:java}
> val stream1 = requestStreams.merge(successStreams).merge(errorStreams)
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.notificationSerde()))
> val streams2 = confirmationStreams
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.confirmationsSerde()))
> val cogrouped =
> stream1.cogroup(notificationAggregator).cogroup(streams2,
> confirmationsAggregator)
>
> .windowedBy(TimeWindows.of(Duration.ofMinutes(notificationStreamsConfig.joinWindowMinutes.toLong())).grace(Duration.ofMinutes(notificationStreamsConfig.graceDurationMinutes.toLong(
> .aggregate({ null }, Materialized.`as` NotificationMetric, WindowStore ByteArray>>("time-windowed-aggregated-stream-store")
>
> .withValueSerde(serdesConfig.notificationMetricSerde()))
> .suppress(Suppressed.untilWindowCloses(unbounded()))
> .toStream()
> {code}
> Exception thrown is:
> {code:java}
> Caused by: java.lang.ClassCastException: class
> org.apache.kafka.streams.kstream.internals.PassThrough cannot be cast to
> class org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier
> (org.apache.kafka.streams.kstream.internals.PassThrough and
> org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier are in
> unnamed module of loader 'app')
> {code}
> [https://stackoverflow.com/questions/63459685/kgroupedstream-with-cogroup-aggregate-suppress]
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[jira] [Commented] (KAFKA-10417) suppress() with cogroup() throws ClassCastException
[
https://issues.apache.org/jira/browse/KAFKA-10417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17242789#comment-17242789
]
Leah Thomas commented on KAFKA-10417:
-
[~duvholt] are you still planning on working on this? If not I'm happy to pick
it up
> suppress() with cogroup() throws ClassCastException
> ---
>
> Key: KAFKA-10417
> URL: https://issues.apache.org/jira/browse/KAFKA-10417
> Project: Kafka
> Issue Type: Bug
> Components: streams
>Affects Versions: 2.6.0
>Reporter: Wardha Perinkada Kattu
>Priority: Critical
> Labels: kafka-streams
> Fix For: 2.8.0, 2.7.1
>
>
> Streams operation - `cogroup()`, `aggregate()` followed by `suppress()`
> throws `ClassCastException`
> Works fine without the `suppress()`
> Code block tested -
> {code:java}
> val stream1 = requestStreams.merge(successStreams).merge(errorStreams)
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.notificationSerde()))
> val streams2 = confirmationStreams
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.confirmationsSerde()))
> val cogrouped =
> stream1.cogroup(notificationAggregator).cogroup(streams2,
> confirmationsAggregator)
>
> .windowedBy(TimeWindows.of(Duration.ofMinutes(notificationStreamsConfig.joinWindowMinutes.toLong())).grace(Duration.ofMinutes(notificationStreamsConfig.graceDurationMinutes.toLong(
> .aggregate({ null }, Materialized.`as` NotificationMetric, WindowStore ByteArray>>("time-windowed-aggregated-stream-store")
>
> .withValueSerde(serdesConfig.notificationMetricSerde()))
> .suppress(Suppressed.untilWindowCloses(unbounded()))
> .toStream()
> {code}
> Exception thrown is:
> {code:java}
> Caused by: java.lang.ClassCastException: class
> org.apache.kafka.streams.kstream.internals.PassThrough cannot be cast to
> class org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier
> (org.apache.kafka.streams.kstream.internals.PassThrough and
> org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier are in
> unnamed module of loader 'app')
> {code}
> [https://stackoverflow.com/questions/63459685/kgroupedstream-with-cogroup-aggregate-suppress]
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[jira] [Commented] (KAFKA-10417) suppress() with cogroup() throws ClassCastException
[
https://issues.apache.org/jira/browse/KAFKA-10417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17230559#comment-17230559
]
Mickael Maison commented on KAFKA-10417:
SInce there's still no PR, removing 2.6.1 from "Fix Version/s"
> suppress() with cogroup() throws ClassCastException
> ---
>
> Key: KAFKA-10417
> URL: https://issues.apache.org/jira/browse/KAFKA-10417
> Project: Kafka
> Issue Type: Bug
> Components: streams
>Affects Versions: 2.6.0
>Reporter: Wardha Perinkada Kattu
>Priority: Critical
> Labels: kafka-streams
> Fix For: 2.6.1, 2.8.0, 2.7.1
>
>
> Streams operation - `cogroup()`, `aggregate()` followed by `suppress()`
> throws `ClassCastException`
> Works fine without the `suppress()`
> Code block tested -
> {code:java}
> val stream1 = requestStreams.merge(successStreams).merge(errorStreams)
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.notificationSerde()))
> val streams2 = confirmationStreams
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.confirmationsSerde()))
> val cogrouped =
> stream1.cogroup(notificationAggregator).cogroup(streams2,
> confirmationsAggregator)
>
> .windowedBy(TimeWindows.of(Duration.ofMinutes(notificationStreamsConfig.joinWindowMinutes.toLong())).grace(Duration.ofMinutes(notificationStreamsConfig.graceDurationMinutes.toLong(
> .aggregate({ null }, Materialized.`as` NotificationMetric, WindowStore ByteArray>>("time-windowed-aggregated-stream-store")
>
> .withValueSerde(serdesConfig.notificationMetricSerde()))
> .suppress(Suppressed.untilWindowCloses(unbounded()))
> .toStream()
> {code}
> Exception thrown is:
> {code:java}
> Caused by: java.lang.ClassCastException: class
> org.apache.kafka.streams.kstream.internals.PassThrough cannot be cast to
> class org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier
> (org.apache.kafka.streams.kstream.internals.PassThrough and
> org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier are in
> unnamed module of loader 'app')
> {code}
> [https://stackoverflow.com/questions/63459685/kgroupedstream-with-cogroup-aggregate-suppress]
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[jira] [Commented] (KAFKA-10417) suppress() with cogroup() throws ClassCastException
[
https://issues.apache.org/jira/browse/KAFKA-10417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17217945#comment-17217945
]
Bill Bejeck commented on KAFKA-10417:
-
Since there's no PR for this ticket yet and the code freeze is tomorrow 10/21
as part of the 2.7.0 release I'm going to change the fix version to 2.8.0 and
2.7.1.
\cc [~vvcephei]
> suppress() with cogroup() throws ClassCastException
> ---
>
> Key: KAFKA-10417
> URL: https://issues.apache.org/jira/browse/KAFKA-10417
> Project: Kafka
> Issue Type: Bug
> Components: streams
>Affects Versions: 2.6.0
>Reporter: Wardha Perinkada Kattu
>Priority: Critical
> Labels: kafka-streams
> Fix For: 2.7.0, 2.6.1
>
>
> Streams operation - `cogroup()`, `aggregate()` followed by `suppress()`
> throws `ClassCastException`
> Works fine without the `suppress()`
> Code block tested -
> {code:java}
> val stream1 = requestStreams.merge(successStreams).merge(errorStreams)
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.notificationSerde()))
> val streams2 = confirmationStreams
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.confirmationsSerde()))
> val cogrouped =
> stream1.cogroup(notificationAggregator).cogroup(streams2,
> confirmationsAggregator)
>
> .windowedBy(TimeWindows.of(Duration.ofMinutes(notificationStreamsConfig.joinWindowMinutes.toLong())).grace(Duration.ofMinutes(notificationStreamsConfig.graceDurationMinutes.toLong(
> .aggregate({ null }, Materialized.`as` NotificationMetric, WindowStore ByteArray>>("time-windowed-aggregated-stream-store")
>
> .withValueSerde(serdesConfig.notificationMetricSerde()))
> .suppress(Suppressed.untilWindowCloses(unbounded()))
> .toStream()
> {code}
> Exception thrown is:
> {code:java}
> Caused by: java.lang.ClassCastException: class
> org.apache.kafka.streams.kstream.internals.PassThrough cannot be cast to
> class org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier
> (org.apache.kafka.streams.kstream.internals.PassThrough and
> org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier are in
> unnamed module of loader 'app')
> {code}
> [https://stackoverflow.com/questions/63459685/kgroupedstream-with-cogroup-aggregate-suppress]
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[jira] [Commented] (KAFKA-10417) suppress() with cogroup() throws ClassCastException
[
https://issues.apache.org/jira/browse/KAFKA-10417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17213725#comment-17213725
]
Christian Duvholt commented on KAFKA-10417:
---
Hi [~vvcephei],
I suspect that I'm not experienced enough with Kafka Streams to solve this
issue, but I can give it a try.
Is there any documentation about `enableSendOldValues` which I could read to
get a better understanding of the issue?
> suppress() with cogroup() throws ClassCastException
> ---
>
> Key: KAFKA-10417
> URL: https://issues.apache.org/jira/browse/KAFKA-10417
> Project: Kafka
> Issue Type: Bug
> Components: streams
>Affects Versions: 2.6.0
>Reporter: Wardha Perinkada Kattu
>Priority: Critical
> Labels: kafka-streams
> Fix For: 2.7.0, 2.6.1
>
>
> Streams operation - `cogroup()`, `aggregate()` followed by `suppress()`
> throws `ClassCastException`
> Works fine without the `suppress()`
> Code block tested -
> {code:java}
> val stream1 = requestStreams.merge(successStreams).merge(errorStreams)
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.notificationSerde()))
> val streams2 = confirmationStreams
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.confirmationsSerde()))
> val cogrouped =
> stream1.cogroup(notificationAggregator).cogroup(streams2,
> confirmationsAggregator)
>
> .windowedBy(TimeWindows.of(Duration.ofMinutes(notificationStreamsConfig.joinWindowMinutes.toLong())).grace(Duration.ofMinutes(notificationStreamsConfig.graceDurationMinutes.toLong(
> .aggregate({ null }, Materialized.`as` NotificationMetric, WindowStore ByteArray>>("time-windowed-aggregated-stream-store")
>
> .withValueSerde(serdesConfig.notificationMetricSerde()))
> .suppress(Suppressed.untilWindowCloses(unbounded()))
> .toStream()
> {code}
> Exception thrown is:
> {code:java}
> Caused by: java.lang.ClassCastException: class
> org.apache.kafka.streams.kstream.internals.PassThrough cannot be cast to
> class org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier
> (org.apache.kafka.streams.kstream.internals.PassThrough and
> org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier are in
> unnamed module of loader 'app')
> {code}
> [https://stackoverflow.com/questions/63459685/kgroupedstream-with-cogroup-aggregate-suppress]
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[jira] [Commented] (KAFKA-10417) suppress() with cogroup() throws ClassCastException
[
https://issues.apache.org/jira/browse/KAFKA-10417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17213606#comment-17213606
]
Matthias J. Sax commented on KAFKA-10417:
-
Just want to point out, that we recently fixed KAFKA-10077 and KAFKA-10494 that
might be related?
> suppress() with cogroup() throws ClassCastException
> ---
>
> Key: KAFKA-10417
> URL: https://issues.apache.org/jira/browse/KAFKA-10417
> Project: Kafka
> Issue Type: Bug
> Components: streams
>Affects Versions: 2.6.0
>Reporter: Wardha Perinkada Kattu
>Priority: Critical
> Labels: kafka-streams
> Fix For: 2.7.0, 2.6.1
>
>
> Streams operation - `cogroup()`, `aggregate()` followed by `suppress()`
> throws `ClassCastException`
> Works fine without the `suppress()`
> Code block tested -
> {code:java}
> val stream1 = requestStreams.merge(successStreams).merge(errorStreams)
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.notificationSerde()))
> val streams2 = confirmationStreams
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.confirmationsSerde()))
> val cogrouped =
> stream1.cogroup(notificationAggregator).cogroup(streams2,
> confirmationsAggregator)
>
> .windowedBy(TimeWindows.of(Duration.ofMinutes(notificationStreamsConfig.joinWindowMinutes.toLong())).grace(Duration.ofMinutes(notificationStreamsConfig.graceDurationMinutes.toLong(
> .aggregate({ null }, Materialized.`as` NotificationMetric, WindowStore ByteArray>>("time-windowed-aggregated-stream-store")
>
> .withValueSerde(serdesConfig.notificationMetricSerde()))
> .suppress(Suppressed.untilWindowCloses(unbounded()))
> .toStream()
> {code}
> Exception thrown is:
> {code:java}
> Caused by: java.lang.ClassCastException: class
> org.apache.kafka.streams.kstream.internals.PassThrough cannot be cast to
> class org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier
> (org.apache.kafka.streams.kstream.internals.PassThrough and
> org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier are in
> unnamed module of loader 'app')
> {code}
> [https://stackoverflow.com/questions/63459685/kgroupedstream-with-cogroup-aggregate-suppress]
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[jira] [Commented] (KAFKA-10417) suppress() with cogroup() throws ClassCastException
[
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]
John Roesler commented on KAFKA-10417:
--
Hi [~duvholt] ,
Thanks for sharing that. It looks like it's just ignoring the request if the
parent processor isn't the right type?
It might be working for you, but if you have any operations downstream that
actually need the old values, then you should beware that you're now silently
getting incorrect results. On the other hand, if you're _just_ doing it to work
around the bug that manifests when you use suppress, then you're probably ok.
It's risky, though, so you might want to take a closer look and/or prioritize
putting in a proper fix.
The KTableValueGetter/enableOldValues thing is _super_ confusing, and as a
matter of fact, it's something I'm planning to clean up now that KIP-478 is
finally over the line. So don't feel bad if it's as clear as mud when you try
to figure out the right way to fix it, it's that way for everyone.
What's happening in the cogroup case is that there are a set of aggregator
processors whose results all get "merged" together, and the KTable is the
result of that merge. The aggregation processors themselves are capable of
`enableSendOldValues`, but the implementation uses the PassThrough for that
merge node, which is not aware of "send old values". What seems to be needed is
for the cogroup merge processor to get a new kind of PassThrough that is
capable of transmitting "enable send old values" to its parents. I'm not sure
whether or not the method could be added to PassThrough harmlessly, or whether
we need some kind of KTableSourcePassThrough supplier.
Does this sound like the kind of thing you want to take a crack at? Although it
may not technically be a blocker, it would be ideal to get a fix for this in
2.7 .
Thanks,
-John
> suppress() with cogroup() throws ClassCastException
> ---
>
> Key: KAFKA-10417
> URL: https://issues.apache.org/jira/browse/KAFKA-10417
> Project: Kafka
> Issue Type: Bug
> Components: streams
>Affects Versions: 2.6.0
>Reporter: Wardha Perinkada Kattu
>Priority: Critical
> Labels: kafka-streams
> Fix For: 2.7.0, 2.6.1
>
>
> Streams operation - `cogroup()`, `aggregate()` followed by `suppress()`
> throws `ClassCastException`
> Works fine without the `suppress()`
> Code block tested -
> {code:java}
> val stream1 = requestStreams.merge(successStreams).merge(errorStreams)
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.notificationSerde()))
> val streams2 = confirmationStreams
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.confirmationsSerde()))
> val cogrouped =
> stream1.cogroup(notificationAggregator).cogroup(streams2,
> confirmationsAggregator)
>
> .windowedBy(TimeWindows.of(Duration.ofMinutes(notificationStreamsConfig.joinWindowMinutes.toLong())).grace(Duration.ofMinutes(notificationStreamsConfig.graceDurationMinutes.toLong(
> .aggregate({ null }, Materialized.`as` NotificationMetric, WindowStore ByteArray>>("time-windowed-aggregated-stream-store")
>
> .withValueSerde(serdesConfig.notificationMetricSerde()))
> .suppress(Suppressed.untilWindowCloses(unbounded()))
> .toStream()
> {code}
> Exception thrown is:
> {code:java}
> Caused by: java.lang.ClassCastException: class
> org.apache.kafka.streams.kstream.internals.PassThrough cannot be cast to
> class org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier
> (org.apache.kafka.streams.kstream.internals.PassThrough and
> org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier are in
> unnamed module of loader 'app')
> {code}
> [https://stackoverflow.com/questions/63459685/kgroupedstream-with-cogroup-aggregate-suppress]
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[jira] [Commented] (KAFKA-10417) suppress() with cogroup() throws ClassCastException
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]
Christian Duvholt commented on KAFKA-10417:
---
I ended up adding an instanceof check before casting to
KTableProcessorSupplier. I've been using this in production for some weeks now
and haven't noticed any issues.
[https://github.com/amedia/kafka/commit/7d2a027f41c246ecb521b85076525f5ed9f3834e]
If someone more experienced with the internals of Kafka Streams thinks this is
a proper fix I can submit a PR.
> suppress() with cogroup() throws ClassCastException
> ---
>
> Key: KAFKA-10417
> URL: https://issues.apache.org/jira/browse/KAFKA-10417
> Project: Kafka
> Issue Type: Bug
> Components: streams
>Affects Versions: 2.6.0
>Reporter: Wardha Perinkada Kattu
>Priority: Critical
> Labels: kafka-streams
> Fix For: 2.6.1, 2.8.0, 2.7.1
>
>
> Streams operation - `cogroup()`, `aggregate()` followed by `suppress()`
> throws `ClassCastException`
> Works fine without the `suppress()`
> Code block tested -
> {code:java}
> val stream1 = requestStreams.merge(successStreams).merge(errorStreams)
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.notificationSerde()))
> val streams2 = confirmationStreams
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.confirmationsSerde()))
> val cogrouped =
> stream1.cogroup(notificationAggregator).cogroup(streams2,
> confirmationsAggregator)
>
> .windowedBy(TimeWindows.of(Duration.ofMinutes(notificationStreamsConfig.joinWindowMinutes.toLong())).grace(Duration.ofMinutes(notificationStreamsConfig.graceDurationMinutes.toLong(
> .aggregate({ null }, Materialized.`as` NotificationMetric, WindowStore ByteArray>>("time-windowed-aggregated-stream-store")
>
> .withValueSerde(serdesConfig.notificationMetricSerde()))
> .suppress(Suppressed.untilWindowCloses(unbounded()))
> .toStream()
> {code}
> Exception thrown is:
> {code:java}
> Caused by: java.lang.ClassCastException: class
> org.apache.kafka.streams.kstream.internals.PassThrough cannot be cast to
> class org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier
> (org.apache.kafka.streams.kstream.internals.PassThrough and
> org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier are in
> unnamed module of loader 'app')
> {code}
> [https://stackoverflow.com/questions/63459685/kgroupedstream-with-cogroup-aggregate-suppress]
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[jira] [Commented] (KAFKA-10417) suppress() with cogroup() throws ClassCastException
[
https://issues.apache.org/jira/browse/KAFKA-10417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17211318#comment-17211318
]
Rens Groothuijsen commented on KAFKA-10417:
---
[~ableegoldman] I would, but I'm not familiar enough with the code to determine
what the best solution would be.
> suppress() with cogroup() throws ClassCastException
> ---
>
> Key: KAFKA-10417
> URL: https://issues.apache.org/jira/browse/KAFKA-10417
> Project: Kafka
> Issue Type: Bug
> Components: streams
>Affects Versions: 2.6.0
>Reporter: Wardha Perinkada Kattu
>Priority: Critical
> Labels: kafka-streams
> Fix For: 2.6.1, 2.8.0, 2.7.1
>
>
> Streams operation - `cogroup()`, `aggregate()` followed by `suppress()`
> throws `ClassCastException`
> Works fine without the `suppress()`
> Code block tested -
> {code:java}
> val stream1 = requestStreams.merge(successStreams).merge(errorStreams)
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.notificationSerde()))
> val streams2 = confirmationStreams
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.confirmationsSerde()))
> val cogrouped =
> stream1.cogroup(notificationAggregator).cogroup(streams2,
> confirmationsAggregator)
>
> .windowedBy(TimeWindows.of(Duration.ofMinutes(notificationStreamsConfig.joinWindowMinutes.toLong())).grace(Duration.ofMinutes(notificationStreamsConfig.graceDurationMinutes.toLong(
> .aggregate({ null }, Materialized.`as` NotificationMetric, WindowStore ByteArray>>("time-windowed-aggregated-stream-store")
>
> .withValueSerde(serdesConfig.notificationMetricSerde()))
> .suppress(Suppressed.untilWindowCloses(unbounded()))
> .toStream()
> {code}
> Exception thrown is:
> {code:java}
> Caused by: java.lang.ClassCastException: class
> org.apache.kafka.streams.kstream.internals.PassThrough cannot be cast to
> class org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier
> (org.apache.kafka.streams.kstream.internals.PassThrough and
> org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier are in
> unnamed module of loader 'app')
> {code}
> [https://stackoverflow.com/questions/63459685/kgroupedstream-with-cogroup-aggregate-suppress]
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[jira] [Commented] (KAFKA-10417) suppress() with cogroup() throws ClassCastException
[
https://issues.apache.org/jira/browse/KAFKA-10417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17211293#comment-17211293
]
Sophie Blee-Goldman commented on KAFKA-10417:
-
[~RensGroothuijsen] would you be interested in submitting a PR for this?
> suppress() with cogroup() throws ClassCastException
> ---
>
> Key: KAFKA-10417
> URL: https://issues.apache.org/jira/browse/KAFKA-10417
> Project: Kafka
> Issue Type: Bug
> Components: streams
>Affects Versions: 2.6.0
>Reporter: Wardha Perinkada Kattu
>Priority: Critical
> Labels: kafka-streams
> Fix For: 2.6.1, 2.8.0, 2.7.1
>
>
> Streams operation - `cogroup()`, `aggregate()` followed by `suppress()`
> throws `ClassCastException`
> Works fine without the `suppress()`
> Code block tested -
> {code:java}
> val stream1 = requestStreams.merge(successStreams).merge(errorStreams)
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.notificationSerde()))
> val streams2 = confirmationStreams
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.confirmationsSerde()))
> val cogrouped =
> stream1.cogroup(notificationAggregator).cogroup(streams2,
> confirmationsAggregator)
>
> .windowedBy(TimeWindows.of(Duration.ofMinutes(notificationStreamsConfig.joinWindowMinutes.toLong())).grace(Duration.ofMinutes(notificationStreamsConfig.graceDurationMinutes.toLong(
> .aggregate({ null }, Materialized.`as` NotificationMetric, WindowStore ByteArray>>("time-windowed-aggregated-stream-store")
>
> .withValueSerde(serdesConfig.notificationMetricSerde()))
> .suppress(Suppressed.untilWindowCloses(unbounded()))
> .toStream()
> {code}
> Exception thrown is:
> {code:java}
> Caused by: java.lang.ClassCastException: class
> org.apache.kafka.streams.kstream.internals.PassThrough cannot be cast to
> class org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier
> (org.apache.kafka.streams.kstream.internals.PassThrough and
> org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier are in
> unnamed module of loader 'app')
> {code}
> [https://stackoverflow.com/questions/63459685/kgroupedstream-with-cogroup-aggregate-suppress]
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[jira] [Commented] (KAFKA-10417) suppress() with cogroup() throws ClassCastException
[
https://issues.apache.org/jira/browse/KAFKA-10417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17211210#comment-17211210
]
Bill Bejeck commented on KAFKA-10417:
-
I'm marking this as critical vs. blocker as I don't believe this to be a
regression, but an issue we missed in the 2.6 release.
> suppress() with cogroup() throws ClassCastException
> ---
>
> Key: KAFKA-10417
> URL: https://issues.apache.org/jira/browse/KAFKA-10417
> Project: Kafka
> Issue Type: Bug
> Components: streams
>Affects Versions: 2.6.0
>Reporter: Wardha Perinkada Kattu
>Priority: Critical
> Labels: kafka-streams
> Fix For: 2.6.1, 2.8.0, 2.7.1
>
>
> Streams operation - `cogroup()`, `aggregate()` followed by `suppress()`
> throws `ClassCastException`
> Works fine without the `suppress()`
> Code block tested -
> {code:java}
> val stream1 = requestStreams.merge(successStreams).merge(errorStreams)
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.notificationSerde()))
> val streams2 = confirmationStreams
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.confirmationsSerde()))
> val cogrouped =
> stream1.cogroup(notificationAggregator).cogroup(streams2,
> confirmationsAggregator)
>
> .windowedBy(TimeWindows.of(Duration.ofMinutes(notificationStreamsConfig.joinWindowMinutes.toLong())).grace(Duration.ofMinutes(notificationStreamsConfig.graceDurationMinutes.toLong(
> .aggregate({ null }, Materialized.`as` NotificationMetric, WindowStore ByteArray>>("time-windowed-aggregated-stream-store")
>
> .withValueSerde(serdesConfig.notificationMetricSerde()))
> .suppress(Suppressed.untilWindowCloses(unbounded()))
> .toStream()
> {code}
> Exception thrown is:
> {code:java}
> Caused by: java.lang.ClassCastException: class
> org.apache.kafka.streams.kstream.internals.PassThrough cannot be cast to
> class org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier
> (org.apache.kafka.streams.kstream.internals.PassThrough and
> org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier are in
> unnamed module of loader 'app')
> {code}
> [https://stackoverflow.com/questions/63459685/kgroupedstream-with-cogroup-aggregate-suppress]
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[jira] [Commented] (KAFKA-10417) suppress() with cogroup() throws ClassCastException
[
https://issues.apache.org/jira/browse/KAFKA-10417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=17187322#comment-17187322
]
Rens Groothuijsen commented on KAFKA-10417:
---
A cogrouped stream creates a KTable with processor supplier type PassThrough,
which implements ProcessorSupplier rather than KTableProcessorSupplier. This
then causes a problem
[here|https://github.com/apache/kafka/blob/trunk/streams/src/main/java/org/apache/kafka/streams/kstream/internals/KTableImpl.java#L842].
> suppress() with cogroup() throws ClassCastException
> ---
>
> Key: KAFKA-10417
> URL: https://issues.apache.org/jira/browse/KAFKA-10417
> Project: Kafka
> Issue Type: Bug
> Components: streams
>Affects Versions: 2.6.0
>Reporter: Wardha Perinkada Kattu
>Priority: Blocker
> Labels: kafka-streams
> Fix For: 2.7.0
>
>
> Streams operation - `cogroup()`, `aggregate()` followed by `suppress()`
> throws `ClassCastException`
> Works fine without the `suppress()`
> Code block tested -
> {code:java}
> val stream1 = requestStreams.merge(successStreams).merge(errorStreams)
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.notificationSerde()))
> val streams2 = confirmationStreams
> .groupByKey(Grouped.with(Serdes.String(),
> serdesConfig.confirmationsSerde()))
> val cogrouped =
> stream1.cogroup(notificationAggregator).cogroup(streams2,
> confirmationsAggregator)
>
> .windowedBy(TimeWindows.of(Duration.ofMinutes(notificationStreamsConfig.joinWindowMinutes.toLong())).grace(Duration.ofMinutes(notificationStreamsConfig.graceDurationMinutes.toLong(
> .aggregate({ null }, Materialized.`as` NotificationMetric, WindowStore ByteArray>>("time-windowed-aggregated-stream-store")
>
> .withValueSerde(serdesConfig.notificationMetricSerde()))
> .suppress(Suppressed.untilWindowCloses(unbounded()))
> .toStream()
> {code}
> Exception thrown is:
> {code:java}
> Caused by: java.lang.ClassCastException: class
> org.apache.kafka.streams.kstream.internals.PassThrough cannot be cast to
> class org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier
> (org.apache.kafka.streams.kstream.internals.PassThrough and
> org.apache.kafka.streams.kstream.internals.KTableProcessorSupplier are in
> unnamed module of loader 'app')
> {code}
> [https://stackoverflow.com/questions/63459685/kgroupedstream-with-cogroup-aggregate-suppress]
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