The parent issue, JDK-8364733, reports that `HttpClient::sendAsync` leaks exceptions which do not extend from `IOException`, and this violates the method's specification. The JDK-8367067 sub-task improved issues around exceptions thrown by request body publishers – which triggered the first encounter with this problem. This sub-task is aimed to end this saga by making sure `HttpClient::sendAsync` translates every operational failure to an `IOException` as per the specification.