I believe it's an expected behavior: your laptop cannot correctly reply to
any messages or HTTP/2 control frames while sleeping, so terminating a call
seems like a quite reasonable thing to do.
I don't know low level details of HTTP/2 stream control, though, so
hopefully someone with a better knowledge in this area can give a better
answer.
Furthermore, it may depend on TCP socket options: if the other side
performs TCP keep-alive checks and notices that your laptop is gone, then
it will terminate the connection.
Cheers!
On Monday, October 18, 2021 at 6:38:38 PM UTC+7 IIFE wrote:
> Hi,
>
> I've got a sync C++ client that opens a long lived bidirectional stream to
> a sync C++ server. I'm seeing an issue where if I keep my client open and
> then put my machine to sleep, the connection is terminated a number of
> hours. Here are the logs I got.
>
> I connected the client at 00:25, and then got the following log:
> 18/10/2021 03:07:48.578
> File: src\core\ext\transport\chttp2\transport\chttp2_transport.cc
> Line: 2871
> Message: ipv4:127.0.0.1:51656: Keepalive watchdog fired. Closing
> transport.
>
> Then at the time I woke up my machine from sleep mode, I saw the following
> log:
> 18/10/2021 09:22:15.372
> src\core\lib\security\transport\security_handshaker.cc
> Line: 183
> Message: Security handshake failed:
> {"created":"@1634545335.372000000","description":"Handshake read
> failed","file":"src\17cc203898-db2679e7f2.clean\src\core\lib\security\transport\security_handshaker.cc","file_line":425,"referenced_errors":[{"created":"@1634545335.372000000","description":"TCP
>
> stream shutting
> down","file":"src\17cc203898-db2679e7f2.clean\src\core\lib\iomgr\tcp_windows.cc","file_line":228,"referenced_errors":[{"created":"@1634545334.503000000","description":"Handshake
>
> timed
> out","file":"src\17cc203898-db2679e7f2.clean\src\core\lib\channel\handshaker.cc","file_line":163}]}]}
>
> I haven't set GRPC_ARG_KEEPALIVE_TIME_MS on the client channel, which
> according to the documentation is disabled by default. Do I need to
> configure keepalive settings on the client to resolve this issue, or is
> there something else going on?
>
> Thanks
>
>
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