Brian Bouterse created PROTON-1328:
--------------------------------------

             Summary: Creating two senders to same address hangs
                 Key: PROTON-1328
                 URL: https://issues.apache.org/jira/browse/PROTON-1328
             Project: Qpid Proton
          Issue Type: Bug
          Components: python-binding
    Affects Versions: 0.14.0
         Environment: Fedora 24 using packages from F24 repos
            Reporter: Brian Bouterse


Do this with the Python bindings for Proton:

1. create a connection
2. create sender A to address 'simple_queue' in a on_timer_task callback
3. send a message using sender A
4. create a second sender B to address 'simple_queue' in a on_timer_task 
callback
5. When you return control from the on_timer_task the second time proton never 
calls on_sendable() again. Also you see the following output with PN_TRACE_FRM=1

[0x7f0cc40099c0]:  -> SASL
[0x7f0cc40099c0]:  <- SASL
[0x7f0cc40099c0]:0 <- @sasl-mechanisms(64) [sasl-server-mechanisms=:ANONYMOUS]
[0x7f0cc40099c0]:0 -> @sasl-init(65) [mechanism=:ANONYMOUS, 
initial-response=b"anonymous@dev"]
[0x7f0cc40099c0]:0 <- @sasl-outcome(68) [code=0]
[0x7f0cc40099c0]:  -> AMQP
[0x7f0cc40099c0]:0 -> @open(16) 
[container-id="04665a66-82a7-4b20-a092-72867f99ccbc", hostname="localhost", 
channel-max=32767]
[0x7f0cc40099c0]:  <- AMQP
[0x7f0cc40099c0]:0 <- @open(16) 
[container-id="19dd820c-b896-4cc7-adfd-0d6faa314a94", channel-max=32767, 
offered-capabilities=@PN_SYMBOL[:"ANONYMOUS-RELAY"], 
properties={:product="qpid-cpp", :version="1.35.0", :platform="Linux", 
:host="dev"}]
channel initialized
on_timer_task called()
[0x7f0cc40099c0]:0 -> @begin(17) [next-outgoing-id=0, 
incoming-window=2147483647, outgoing-window=2147483647]
[0x7f0cc40099c0]:0 -> @attach(18) 
[name="04665a66-82a7-4b20-a092-72867f99ccbc-simple_queue", handle=0, 
role=false, snd-settle-mode=2, rcv-settle-mode=0, source=@source(40) 
[durable=0, timeout=0, dynamic=false], target=@target(41) 
[address="simple_queue", durable=0, timeout=0, dynamic=false], 
initial-delivery-count=0]
[0x7f0cc40099c0]:0 <- @begin(17) [remote-channel=0, next-outgoing-id=0, 
incoming-window=2147483647, outgoing-window=2147483647]
[0x7f0cc40099c0]:0 <- @attach(18) 
[name="04665a66-82a7-4b20-a092-72867f99ccbc-simple_queue", handle=0, role=true, 
snd-settle-mode=2, rcv-settle-mode=0, source=@source(40) [durable=0, timeout=0, 
dynamic=false], target=@target(41) [address="simple_queue", durable=0, 
timeout=0, dynamic=false], initial-delivery-count=0]
[0x7f0cc40099c0]:0 <- @flow(19) [next-incoming-id=0, 
incoming-window=2147483647, next-outgoing-id=0, outgoing-window=2147483647, 
handle=0, delivery-count=0, link-credit=500, drain=false]
on_sendable() called
[0x7f0cc40099c0]:0 -> @transfer(20) [handle=0, delivery-id=0, 
delivery-tag=b"1", message-format=0, settled=false, more=false] (139) 
"\x00Sp\xd0\x00\x00\x00\x0b\x00\x00\x00\x05BP\x04@BR\x00\x00Ss\xd0\x00\x00\x00/\x00\x00\x00\x0d@@@\xa1\x0csimple_queue@@@@\x83\x00\x00\x00\x00\x00\x00\x00\x00\x83\x00\x00\x00\x00\x00\x00\x00\x00@R\x00@\x00Sw\xa0<aGVsbG93b3JkLCBzZW50IGF0IDIwMTYtMTAtMTcgMTk6MzA6MTAuMTc5NjQ3"
on_sendable() called
[0x7f0cc40099c0]:0 <- @flow(19) [next-incoming-id=1, 
incoming-window=2147483647, next-outgoing-id=0, outgoing-window=2147483647, 
handle=0, delivery-count=1, link-credit=500, drain=false]
[0x7f0cc40099c0]:0 <- @disposition(21) [role=true, first=0, last=0, 
settled=true, state=@accepted(36) []]
on_sendable() called
on_accepted() called
on_timer_task called()
[0x7f0cc40099c0]:0 -> @attach(18) 
[name="04665a66-82a7-4b20-a092-72867f99ccbc-simple_queue", handle=1, 
role=false, snd-settle-mode=2, rcv-settle-mode=0, source=@source(40) 
[durable=0, timeout=0, dynamic=false], target=@target(41) 
[address="simple_queue", durable=0, timeout=0, dynamic=false], 
initial-delivery-count=0]



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