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[GH-ISSUE #58] client is unaware that it needs to reconnect after OS suspend #51

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opened 2026-03-02 23:02:01 +03:00 by kerem · 1 comment
kerem commented 2026-03-02 23:02:01 +03:00
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Originally created by @PAStheLoD on GitHub (Dec 15, 2021).
Original GitHub issue: https://github.com/agrinman/tunnelto/issues/58

I left my PC (WSL2 on Win11) in suspend for overnight and the client continues running, but the tunnel is not found when I tried it in the morning.

This has happened a few times already, but now I've started the client with --verbose, and when it happens next time I'll try to get more details. (strace? gdb?)

Originally created by @PAStheLoD on GitHub (Dec 15, 2021). Original GitHub issue: https://github.com/agrinman/tunnelto/issues/58 I left my PC (WSL2 on Win11) in suspend for overnight and the client continues running, but the tunnel is not found when I tried it in the morning. This has happened a few times already, but now I've started the client with --verbose, and when it happens next time I'll try to get more details. (strace? gdb?)
kerem commented 2026-03-02 23:02:02 +03:00
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@PAStheLoD commented on GitHub (Dec 16, 2021):

After some suspend here's a strace output.

$ strace -f -p 5499
strace: Process 5499 attached with 17 threads
[pid  5515] futex(0x7f26ee9f4360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  5514] sched_yield( <unfinished ...>
[pid  5513] futex(0x7f26eedf6360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  5512] futex(0x7f26eeff7360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  5511] futex(0x7f26ef1f8360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  5510] futex(0x7f26ef3f9360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  5509] futex(0x7f26ef5fa360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  5508] futex(0x7f26ef7fb360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  5507] futex(0x7f26ef9fc360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  5506] futex(0x7f26efbfd360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  5505] futex(0x7f26efdfe360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  5504] futex(0x7f26effff360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  5503] futex(0x7f26fc397360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  5501] futex(0x7f26fc79c360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  5500] futex(0x7f26fc99d360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  5514] <... sched_yield resumed>)  = 0
[pid  5502] futex(0x7f26fc59b360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  5499] futex(0x7f26fc99e760, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  5514] sched_yield()               = 0
[pid  5514] sched_yield()               = 0
[pid  5514] epoll_wait(3,
<!-- gh-comment-id:995571369 --> @PAStheLoD commented on GitHub (Dec 16, 2021): After some suspend here's a strace output. ``` $ strace -f -p 5499 strace: Process 5499 attached with 17 threads [pid 5515] futex(0x7f26ee9f4360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5514] sched_yield( <unfinished ...> [pid 5513] futex(0x7f26eedf6360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5512] futex(0x7f26eeff7360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5511] futex(0x7f26ef1f8360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5510] futex(0x7f26ef3f9360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5509] futex(0x7f26ef5fa360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5508] futex(0x7f26ef7fb360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5507] futex(0x7f26ef9fc360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5506] futex(0x7f26efbfd360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5505] futex(0x7f26efdfe360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5504] futex(0x7f26effff360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5503] futex(0x7f26fc397360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5501] futex(0x7f26fc79c360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5500] futex(0x7f26fc99d360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5514] <... sched_yield resumed>) = 0 [pid 5502] futex(0x7f26fc59b360, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5499] futex(0x7f26fc99e760, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...> [pid 5514] sched_yield() = 0 [pid 5514] sched_yield() = 0 [pid 5514] epoll_wait(3, ```
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