Closed Bug 1605862 Opened 5 years ago Closed 5 years ago

Decrease UDP socket read timeout in mDNS service

Categories

(Core :: WebRTC: Networking, defect, P2)

73 Branch
All
Windows
defect

Tracking

()

RESOLVED FIXED
mozilla74
Tracking Status
firefox73 --- wontfix
firefox74 --- fixed

People

(Reporter: dminor, Assigned: dminor)

References

(Blocks 1 open bug)

Details

Attachments

(1 file)

In Bug 1601992 we're seeing occasional shutdown hangs with a stack trace like:
0 ntdll.dll NtWaitForSingleObject
1 mswsock.dll SockWaitForSingleObject
2 mswsock.dll guard_check_icall_nop
3 ws2_32.dll WSARecvFrom
4 wsock32.dll recvfrom
5 xul.dll static void mdns_service::{{impl}}::start::{{closure}}(struct mdns_service::{{impl}}::start::closure-0) media/mtransport/mdns_service/src/lib.rs:382

The current read timeout of 10ms was chosen arbitrarily. I'd like to try a smaller timeout to see if it helps with the shutdown hangs we're seeing.

The original values of 10ms were chosen arbitrarily. Decreasing the values may
help prevent shutdown hanges like those seen in Bug 1601992.

Attachment #9118934 - Attachment description: Bug 1605862 - Decrease UDP socket timeouts in mDNS service; r=ng! → Bug 1605862 - Decrease UDP socket timeouts in mDNS service; r=mjf!
Pushed by dminor@mozilla.com:
https://hg.mozilla.org/integration/autoland/rev/ec9b07bbdf77
Decrease UDP socket timeouts in mDNS service; r=mjf
Status: ASSIGNED → RESOLVED
Closed: 5 years ago
Resolution: --- → FIXED
Target Milestone: --- → mozilla74

I'm having a difficult time ascertaining what affect this patch had. Have you seen a noticeable change in any shutdown hang bugs you're looking at, Dan?

Flags: needinfo?(dminor)

(In reply to Ryan VanderMeulen [:RyanVM] from comment #4)

I'm having a difficult time ascertaining what affect this patch had. Have you seen a noticeable change in any shutdown hang bugs you're looking at, Dan?

The shutdown hangs were pretty uncommon and only showed up in beta, but the mDNS stuff is currently disabled there, so we won't see the effect (if any) of this patch until Firefox 74 hits beta.

Flags: needinfo?(dminor)
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