[PROTON-2673] Proactor hangs if pn_raw_connection_wake() is called with outstanding connection attempt

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: proton-c-0.38.0, proton-c-0.39.0
• Fix Version/s: proton-c-0.39.0
• Component/s: proton-c
• Assignee: Clifford Jansen
• Reporter: Ken Giusti
• Created: 20/Jan/23 16:55
• Updated: 07/Jun/23 12:18
• Resolved: 12/Apr/23 05:17

Description

If pn_raw_connection_wake() is called on a raw connection that is attempting to connect  no further proactor events are generated and the proactor hangs.

Important observations:

• This only occurs if there is no server available at the target address for the connection. If a server is present then the PN_RAW_CONNECTION_WAKE and PN_RAW_CONNECTION_CONNECTED events arrive properly (in that order).
• The host address is "localhost" - using "127.0.0.1" or "::1" instead works. localhost on my machine maps to both "127.0.0.1" and "::1"
• Extra bonus: if you move the call to pn_raw_connection_wake() to before the call to pn_proactor_raw_connect() a crash occurs

See attached reproducer.

Issue Links

• links to: test_02_credit_replenish failure in system_tests_http1_adaptor #970