[PROTON-17] pn_drain(link, 0) doesn't trigger issuing of flow

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Component/s: proton-c
• Assignee: Rafael H. Schloming
• Reporter: Gordon Sim
• Created: 06/Sep/12 21:37
• Updated: 08/Jan/16 10:57
• Resolved: 11/Sep/12 14:41

Description

In implementing a timed synchronous get, I issue one unit of credit, wait for the time specified, then I want to drain that credit in order to unambiguously determine if a message arrived or not. I don't want to increase the credit so in calling pn_drain() I want the second parameter to be 0. However doing so fails to trigger a new flow to be sent (with the drain flag set). Using a non-zero credit value, i.e. increasing the credit, does trigger the flow.