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https://issues.apache.org/jira/browse/GERONIMO-3751?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sangjin Lee closed GERONIMO-3751.
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> callbacks may not be completed when caller uses future.get() too to complete
> request handling
> ---------------------------------------------------------------------------------------------
>
> Key: GERONIMO-3751
> URL: https://issues.apache.org/jira/browse/GERONIMO-3751
> Project: Geronimo
> Issue Type: Bug
> Security Level: public(Regular issues)
> Components: AsyncHttpClient
> Affects Versions: 1.x
> Reporter: Sangjin Lee
> Priority: Minor
> Attachments: GERONIMO-3751.patch
>
>
> Currently the callback methods from AsyncHttpClientCallback get called
> *after* the response future object is completed. I think this causes a
> subtle bug that may prevent the callback methods from being completed if one
> uses both the callback and the future.
> For example, consider the following case:
> ResponseFuture future = client.invoke(..., callback); // callback is not null
> HttpResponseMessage response = future.get(); // this blocks until future is
> complete
> Since the future is completed before the callback is invoked, the caller
> thread in this case gets unblocked before the callback is called. If the
> caller thread goes away, then there is possibility that the callback may not
> be completed or may not even be called, depending on the timing.
> This strikes me as a bug... I propose we invoke the callback first and then
> complete the future so the callbacks are guaranteed to be completed even if
> future is used.
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