Re: Anyone using SmallRye Reactive Messaging with TomEE?

Thank you for your feedback Jonathan. That's reassuring.


On Tuesday, December 9th, 2025 at 5:39 PM, Jonathan S. Fisher <exabrial@gma=
il.com> wrote:

> I've run Netty inside TomEE in the past without problems. As much as
> possible, try to let TomEE manage thread pools seems to be a good practic=
e.
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> On Tue, Dec 9, 2025 at 10:08=E2=80=AFAM Skander skander.soltane@protonmai=
l.com
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> wrote:
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> > Hi everyone,
> >=20
> > I'm considering integrating SmallRye Reactive Messaging 4.31.0 (with
> > either JMS or Kafka connectors) into a TomEE-based application and woul=
d
> > like to hear from anyone who has already tried this.
> > Has anyone successfully deployed SmallRye Reactive Messaging on TomEE i=
n
> > production? Did you encounter any issues or notice regressions with oth=
er
> > TomEE features?
> >=20
> > I'm particularly concerned about the dependencies this brings in - main=
ly
> > the Vert.x, Mutiny, and Netty stack:
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> > - vertx-core: 4.5.21
> > - smallrye-mutiny-vertx-core: 3.19.1
> > - mutiny: 2.9.3
> > - netty-*: 4.1.125.Final (10+ netty modules)
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> > Plus the connector-specific JARs (kafka-clients 4.1.0 for Kafka, or the
> > JMS connector).
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> > Before OpenLiberty integrated Vert.x, they documented some concerns abo=
ut
> > threading and resource management conflicts between Vert.x's event-loop
> > model and servlet container threading [1] [2].
> > I'm wondering if anyone has run into similar issues in TomEE - threadin=
g
> > conflicts, classloader problems with Netty/Vert.x, performance impacts,=
 or
> > anything else unexpected?
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> > Any feedback from real-world deployments would be really helpful.
> >=20
> > Thanks!
> >=20
> > Skander
> >=20
> > [1] https://github.com/OpenLiberty/open-liberty/issues/8962[2]
> > https://github.com/OpenLiberty/open-liberty/issues/12472
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> --
> Jonathan | [email protected]
> Pessimists, see a jar as half empty. Optimists, in contrast, see it as ha=
lf
> full.
> Engineers, of course, understand the glass is twice as big as it needs to
> be.