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Posted to dev@felix.apache.org by "Pierre De Rop (JIRA)" <ji...@apache.org> on 2017/01/01 22:19:58 UTC
[jira] [Reopened] (FELIX-5471) Ensure that unbound services are
always handled synchronously
[ https://issues.apache.org/jira/browse/FELIX-5471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Pierre De Rop reopened FELIX-5471:
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> 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.
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