[Bug 1936881] Re: fix channel_termination_timeout

[Sergio Durigan Junior]

Thanks for the report and the patch, Seyeong.

I understand that these rabbitmq-server bugs are indeed hard to
reproduce; this is unfortunately not the first time it happens :-/.

I looked at the debdiff you posted and I have a few comments about it:

- Since the patch comes from upstream (which is great, btw), it is
common practice to add DEP-3 headers to it.

- Given that it was not possible to come up with a local reproducer for
this issue, do you think the customer would be willing to try a PPA
build of rabbitmq-server containing this patch?  I think this is the
"next best thing" in order to at least verify that this backport works
for them.

- As a side note: rabbitmq-server is being sync'ed by git-ubuntu, which
means that you can "git ubuntu clone rabbitmq-server", work on the
proper branch (ubuntu/bionic-devel, in this case), push it to your LP
namespace and create an MP off of it.  It's not required, but may be
easier to review/discuss.  Up to you :-).

Thanks.

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https://bugs.launchpad.net/bugs/1936881

Title:
  fix channel_termination_timeout

Status in rabbitmq-server package in Ubuntu:
  Fix Released
Status in rabbitmq-server source package in Bionic:
  New

Bug description:
  [Impact]

  Bionic, Openstack

  The customer reported below issue

  And there are queues which has unconsumed msgs. so wasn't able to
  create instance.

  they was able to fix this by rebooting nova-compute node.

  =CRASH REPORT==== 2-Jul-2021::04:30:57 ===
  crasher:
  initial call: rabbit_reader:init/4
  pid: <0.17293.17>
  registered_name: []
  exception exit: channel_termination_timeout
  in function rabbit_reader:wait_for_channel_termination/3 (src/rabbit_reader.erl, line 800)
  in call from rabbit_reader:send_error_on_channel0_and_close/4 (src/rabbit_reader.erl, line 1548)
  in call from rabbit_reader:terminate/2 (src/rabbit_reader.erl, line 642)
  in call from rabbit_reader:handle_other/2 (src/rabbit_reader.erl, line 567)
  in call from rabbit_reader:mainloop/4 (src/rabbit_reader.erl, line 529)
  in call from rabbit_reader:run/1 (src/rabbit_reader.erl, line 454)
  in call from rabbit_reader:start_connection/4 (src/rabbit_reader.erl, line 390)

  There is upstream patch and they also doesn't have reliable
  reproducer.

  https://github.com/rabbitmq/rabbitmq-server/pull/1550
  https://github.com/rabbitmq/rabbitmq-server/issues/544

  [Test Case]
  - not able to reproduce this.
  - I made test pkg with this patch, and test openstack env worked fine. but need review
  - - https://launchpad.net/~seyeongkim/+archive/ubuntu/sf314324/

  [Where problems could occur]
  As this patch is for rabbitmq-server, rabbitmq-server should be restarted and messaging between components may have problem

  [Others]

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