[jira] [Created] (FELIX-5471) Ensure that unbound services are always handled synchronously

["Pierre De Rop (JIRA)" <ji...@apache.org>]

Pierre De Rop created FELIX-5471:
------------------------------------

             Summary: Ensure that unbound services are always handled synchronously
                 Key: FELIX-5471
                 URL: https://issues.apache.org/jira/browse/FELIX-5471
             Project: Felix
          Issue Type: Bug
          Components: Dependency Manager
    Affects Versions: org.apache.felix.dependencymanager-r1
            Reporter: Pierre De Rop
            Assignee: Pierre De Rop
             Fix For: org.apache.felix.dependencymanager-r9


When a component loses a service dependency, it should handle the lost service synchronously. For example, if service A loses a dependency on B (because B is being unregistered),  then A.remove(B) should be called synchronously (when B is being unregistered from the service registry), else the A.remove(B) callback could possibly be invoked while B is already unregistered and stopped.

Currently, unbound services may be handled asynchronously if DM is used in a concurrent mode (using a threadpool). And even if no threadpool is used, the issue may happen if there is a highly concurrent situation where services are registered/removed concurrently from multiple threads.

So, a patch should be done in order to ensure that a service dependency remove event is always handled synchronously (especially if DM is used with a threadpool).

I will provide a testcase soon.





--
This message was sent by Atlassian JIRA
(v6.3.4#6332)