Hibernate Reactive problem with RESTEasy Reactive

[SetoKaiba]

I want to use a REST Reactive endpoint to create some data. I use the code below. I even just use empty entities. It will not return and no error printed. If I make the size less, it will sucessfully return. What's the problem?

    @Path("/record/generateDataset/{recordId36}")
    @POST
    @WithTransaction
    public Uni<LiveResponse> generateDataset(JsonObject subtitle, String recordId36) {
        Uni<?> uni = Uni.createFrom().voidItem();
        Dataset dataset = new Dataset();
        uni = uni.chain(v -> dataset.persist());
        for (int i = 0; i < 3000; i++) {
                            DatasetItem datasetItem = new DatasetItem();
                            datasetItem.dataset = dataset;
                            uni = uni.chain(v -> datasetItem.persist());
        }
        return uni.chain(e -> {
            System.out.println("haha");
            return Uni.createFrom().item(new LiveResponse(LiveResponse.CODE_OK, "ok"));
        }).onFailure().invoke(e->e.printStackTrace());
    }

[quarkus-bot[bot]]

/cc @DavideD (hibernate-reactive), @FroMage (resteasy-reactive), @Sanne (hibernate-reactive), @gavinking (hibernate-reactive), @geoand (resteasy-reactive), @stuartwdouglas (resteasy-reactive)

[SetoKaiba]

I found out the problem. I can use Uni.combine instead to solve the problem.

[SetoKaiba]

Unmark answer because of Martin Kouba's reply.
https://quarkusio.zulipchat.com/#narrow/stream/187030-users/topic/Hibernate.20Reactive.20problem.20with.20RESTEasy.20Reactive/near/404267071

[SetoKaiba]

Now I use PanacheEntityBase.persist(Iterable<?>) instead. And, it worked. It should be without thread-safe problem now. Right? @mkouba @cescoffier @DavideD

[mkouba]

👍 Yes, that should be safe because it's using org.hibernate.reactive.mutiny.Mutiny.Session.persistAll(Object...) under the hood.