[QPID-2968] Blocking on dead sockets

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.7, 0.8, 0.9, Future
• Component/s: Python Client
• Labels: patch

Environment

Does not matter

• Assignee: Rafael H. Schloming
• Reporter: Dmitry Konishchev
• Created: 03/Dec/10 21:24
• Updated: 10/Aug/16 15:33

Description

• If you open a few connections, and one of them breaks (for example,
  due to a network error), another connections can be locked for time, which is
  equal to network timeout of the broken connection. This happens due to
  working with sockets in blocking mode and due to using one Selector for all
  connections.
• All connections could become locked forever due to races between
  Driver and Selector objects. Driver object removes itself from the Selector
  non-atomically and a situation when Driver is alredy closed, but the Selector
  refers to it could happen. In this case select() call in the Selector raise
  an exeption due to self._transport.fileno() call on Driver where
  self._transport is None. The selector doesn't handle errors on select(), so
  the selector's thread will be stopped due to unhandled Exception.
• There is no checks on EINTR error on os.* calls.