NullPointerException with 1.2.0 version of vertx-spring-boot-starter-http and Spring Boot 2.5.4

[niushapaks]

Hi guys, I've got this error while sending a GET request to my sample application :

2021-08-31 10:59:14.036 ERROR 45489 --- [ntloop-thread-1] io.vertx.core.impl.ContextImpl           : Unhandled exception

java.lang.NullPointerException: cause
    at io.netty.util.internal.ObjectUtil.checkNotNull(ObjectUtil.java:39) ~[netty-common-4.1.67.Final.jar:4.1.67.Final]

Here are my parent and key dependencies :

[...]
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.4</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

[...]
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-webflux</artifactId>
        </dependency>

        <dependency>
            <groupId>dev.snowdrop</groupId>
            <artifactId>vertx-spring-boot-starter-http</artifactId>
            <version>1.1.6</version>
        </dependency>
[...]

This seems to be linked to this issue : https://github.com/TNG/keycloak-mock/issues/74

It works well with 1.1.6 version of vertx-spring-boot-starter-http

[jacobdotcosta]

Hi.

We're releasing 1.2.1 that should fix this problem, by updating Vert.x to version 3.9.8 (check PR #98 ).

[jacobdotcosta]

Version 1.2.1has been released. Could you retest using this version? @niushapaks

[niushapaks]

Although I'm not able to reproduce the problem with 1.2.0 (maybe a sub dependency also upgraded netty / vert.x), It works well with version 1.2.1, thanks !