`MBeanExporter` produces "Using deprecated '-debug' fallback for parameter name resolution..." warnings

[Sebottenhof99]

I have a bean that implements NotificationPublisherAware in order to send JMX notifications.

I put then this bean to MBeanExporter's Bean Map:

 Map<String, Object> beans = new HashMap<>();
    String key =  someName;
    beans.put(key, jmxNotificationSender);
    exporter.setBeans(beans);

In this way created MBeanExporter bean then tries to prepare my jmxNotificationSender. Among others exporter invokes createAndConfigureMBean method, which in turn uses MBeanInfoAssembler to scan jmxNotificationSender to obtain some information. I could trace down, that AbstractReflectiveMBeanInfoAssembler as an implementation is used here. This AbstractReflectiveMBeanInfoAssembler invokes getOperationParameters method, which actually causes the warning since it discovers method parameters (introspection).

Will this issue somehow be handled in the future?

Tested with Spring Framework 6.0.9 and Java 17

[bclozel]

Have you tried compiling your application with the -parameters compiler flag as suggested in the upgrade notes?

[Sebottenhof99]

Hello=) yes, sure. And it works out. With this solution I just have a feeling, that it is not a proper solution, but a workaround to push the warning away...maybe I am wrong here

[sbrannen]

Hello=) yes, sure. And it works out.

Thanks for the confirmation.

Closing this issue as a result.

With this solution I just have a feeling, that it is not a proper solution, but a workaround to push the warning away...maybe I am wrong here

It's not a workaround. It's the appropriate action to take. The -debug option is deprecated.

Furthermore, LocalVariableTableParameterNameDiscoverer (which relied on -debug) no longer exists in Spring Framework 6.1.

• Remove LocalVariableTableParameterNameDiscoverer #29559

[Sebottenhof99]

@sbrannen got it, thank you!!