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Don't hang in timed out connection attempt #9815

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merged 2 commits into from
Jul 4, 2023
Merged

Don't hang in timed out connection attempt #9815

merged 2 commits into from
Jul 4, 2023

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Al2Klimov
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Al2Klimov added 2 commits July 3, 2023 17:16
@Al2Klimov
Connect(): don't try next DNS record if operation is canceled
243b8aa 
Instead return immediately to meet the caller's expectations.
@Al2Klimov
ApiListener#NewClientHandlerInternal(): on basic_socket#cancel() (due…
e0e10a7 
… to timeout) don't ssl::stream#async_shutdown()

If a connection hangs for too long in ApiListener#NewClientHandler(),
ApiListener#AddConnection()'s Timeout calls boost::asio::basic_socket#cancel()
on that connection to trigger an exception which unwinds
ApiListener#NewClientHandler(). Previously that unwind could trigger a Defer
which called boost::asio::ssl::stream#async_shutdown() which extended the hang.
@cla-bot cla-bot bot added the cla/signed label Jul 3, 2023
@icinga-probot icinga-probot bot added this to the 2.13.8 milestone Jul 3, 2023
@icinga-probot icinga-probot bot added area/distributed Distributed monitoring (master, satellites, clients) bug Something isn't working ref/IP ref/NC labels Jul 3, 2023
@Al2Klimov Al2Klimov mentioned this pull request Jul 4, 2023
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@Al2Klimov Al2Klimov merged commit 8fbfb2f into support/2.13 Jul 4, 2023
@icinga-probot icinga-probot bot deleted the 2.13.8/stuck branch July 4, 2023 15:34
@Al2Klimov Al2Klimov mentioned this pull request Jul 5, 2023
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@julianbrost julianbrost julianbrost approved these changes

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area/distributed Distributed monitoring (master, satellites, clients) bug Something isn't working cla/signed ref/IP ref/NC
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@Al2Klimov @julianbrost