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Mismatch between release.version in pom.xml and dependencies #906
Description
Hi, I'm trying to compile the master branch of the project and one of the difficulties I'm facing is:
In the parent pom.xml, release.version that is used for the target and release compiler flags is set to 8 in line 65:
<release.target>8</release.target>
But there's a dependency in the parallel-consumer-mutiny module:
<dependency>
<groupId>io.smallrye.reactive</groupId>
<artifactId>mutiny</artifactId>
<version>2.9.4</version>
</dependency>
that uses java.util.concurrent.Flow and other classes that where only introduced in Java 9. In fact, I think the compiler target for that dependency is 17.
Are there instructions on how to compile the project? There must be some tricks, I don't see how this can work for anyone.
Environment:
Apache Maven 3.9.12 (848fbb4bf2d427b72bdb2471c22fced7ebd9a7a1)
Java version: 17.0.2, vendor: Oracle Corporation
Default locale: en_US, platform encoding: UTF-8
OS name: "mac os x", version: "26.2", arch: "aarch64", family: "mac"
Activity
astubbs commentedon Aug 5, 2026
Tracked in the maintained fork as astubbs#194, which carries a summary of this
issue and its current status there.
The Confluent-hosted version of this project is no longer maintained - its README says so.
Parallel Consumer itself continues in my fork: https://github.com/astubbs/parallel-consumer
Nothing in this repository is closed or changed by this comment.
docs(agents): read the upstream original, not just the mirror summary
docs(agents): read the upstream original, not just the mirror summary
fix #194: declare the Mutiny module's real Java 17 floor (#214)
astubbs commentedon Sep 18, 2026
Lutz Hühnken (@lutzh) - fixed and released in the maintained fork, in v0.6.0.0. The coordinates changed with the fork - on Maven Central it is now:
(
parallel-consumer-vertx,parallel-consumer-reactorandparallel-consumer-mutinylikewise.) The Java package isbz.stub.parallelconsumertoo, so imports change with it - one command rewrites them (GNUsed; on macOS usesed -i ''):The short version of the fix:
parallel-consumer-mutinynow declares its real floor, Java 17, since SmallRye Mutiny 2.x is compiled for 17; the other modules stay at Java 8 bytecode (astubbs#214). The fork's mirror is astubbs#194.docs(release) #197: the six outright-fixed upstream issues are told
docs(readme) confluentinc#920: the README says a build needs JDK 17, …