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From "Miroslav Matejovsky (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CAMEL-8906) Application hangs when Spring Boot Actuator shutdown hook is used
Date Fri, 26 Jun 2015 10:44:04 GMT

    [ https://issues.apache.org/jira/browse/CAMEL-8906?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14602684#comment-14602684
] 

Miroslav Matejovsky commented on CAMEL-8906:
--------------------------------------------

Hi Henryk,
I had to use reflection just for workaround because {{CamelSpringBootApplicationController.mainSupport}}
is private.
In pull request {{CamelSpringBootApplicationController}} as a spring bean will have {{@PreDestroy}}
method, so no need for reflection.

> Application hangs when Spring Boot Actuator shutdown hook is used
> -----------------------------------------------------------------
>
>                 Key: CAMEL-8906
>                 URL: https://issues.apache.org/jira/browse/CAMEL-8906
>             Project: Camel
>          Issue Type: Sub-task
>          Components: camel-spring-boot
>    Affects Versions: 2.15.2
>            Reporter: Miroslav Matejovsky
>
> After some investigation:
> * {{org.apache.camel.spring.boot.CamelSpringBootApplicationController}} creates {{org.apache.camel.main.MainSupport}}
instance
> * {{MainSupport.waitUntilCompleted()}} will hang on {{latch.await()}}
> * To release this lock {{MainSupport.completed()}} has to be called. But this never happens
> * CamelSpringBootApplicationController should implement {{@PreDestroy}} callback and
call {{mainSupport.completed()}}
> * Workaround:
> {code}
>   @Autowired
>   private CamelSpringBootApplicationController camelSpringBootApplicationController;
>   @PreDestroy
>   public void preDestroy() throws Exception {
>     final Field f = camelSpringBootApplicationController.getClass().getDeclaredField("mainSupport");
>     f.setAccessible(true);
>     MainSupport mainSupport = (MainSupport) f.get(camelSpringBootApplicationController);
>     mainSupport.completed();
>   }
> {code}



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