Help with dependencies using akka http 10.0.11 and akka stream 2.5.8

[Papelucho Nomas]

Hello,

I'm using akka http and streams on my project but when I update stream to 2.5.7 or 2.5.8 I get the following exception, only during execution using the fat jar and not in test.

Dec 12 10:08:20 batch java[44371]: Exception in thread "main" java.lang.NoClassDefFoundError: akka/stream/stage/CallbackWrapper

...

Dec 12 10:08:20 batch java[44371]: Caused by: java.lang.ClassNotFoundException: akka.stream.stage.CallbackWrapper

If I go back to 2.5.6 it works fine, I found that CallbackWrapper does not exists on 2.5.7 and that akka http depends on streams 2.4.x

- Should I stay in akka stream 2.5.6 and check the release notes of akka http until they move to 2.5.x?

- Is there another dependency I'm not including?

- Should I check my build.sbt so test and assembly classpaths are the same? how can I validate that? (maybe this is not an akka question)

Thanks,

Sebastian.

[Arnout Engelen]

Hello,

CallbackWrapper is a piece of internal API which is indeed no longer available in stream 2.5.8. This should normally not be a problem (as it was internal), and in general akka-http 10.0.x should work with akka 2.5.x.

There might be some other project that accidentally depended on this internal API - this was the case for example for akka-streams-kafka, which was fixed in version 0.18.

Could you share a bit more of the stacktrace leading up to this exception?

Kind regards,

Arnout

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[Papelucho Nomas]

Arnout,

Short version: it was akka-streams-kafka 0.16.

Long version: I had to update "akka-stream-kafka" from "0.16" -> "0.18". To keep things straight updated "kafka-clients" to "0.11.0.1" and "scalatest-embedded-kafka" from "0.14.0" to "0.16.0"

My unit tests complete but I'm not happy with testing against higher version of kafka, so I'll have to update it sooner than later... :(

It is hard for me to debug this kind of stuff, I would like to know what are the final dependencies of a library in SBT.

Thank you very much,

Sebastian.

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[Patrik Nordwall]

tis 12 dec. 2017 kl. 20:13 skrev Papelucho Nomas <pape...@gmail.com>:

Arnout,

Short version: it was akka-streams-kafka 0.16.

Long version: I had to update "akka-stream-kafka" from "0.16" -> "0.18". To keep things straight updated "kafka-clients" to "0.11.0.1" and "scalatest-embedded-kafka" from "0.14.0" to "0.16.0"

My unit tests complete but I'm not happy with testing against higher version of kafka, so I'll have to update it sooner than later... :(

It is hard for me to debug this kind of stuff, I would like to know what are the final dependencies of a library in SBT.

I’d recommend https://github.com/jrudolph/sbt-dependency-graph

/Patrik