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Introduce extended Keep-Alive options #1437

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mp911de opened this issue Sep 30, 2020 · 4 comments
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Introduce extended Keep-Alive options #1437

mp911de opened this issue Sep 30, 2020 · 4 comments
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type: feature A new feature
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6.1 M1

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@mp911de
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mp911de commented Sep 30, 2020

Feature Request

We should support extended Keep-Alive configuration (enabled, idle, interval, count) for more fine-grained control of keep-alive.

Is your feature request related to a problem? Please describe

Detection of dead peers, see #1428.

Describe the solution you'd like

Applying Keep-Alive channel options automatically.

Describe alternatives you've considered

Manual configuration, see #1428 (comment) and #1428 (comment).
@mp911de mp911de added the type: feature A new feature label Sep 30, 2020
@mp911de mp911de mentioned this issue Sep 30, 2020
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@mp911de
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mp911de commented Nov 30, 2020

ExtendedSocketOptions.TCP_KEEPIDLE was introduced with Java 11.

@mp911de mp911de added this to the 6.1 M1 milestone Nov 30, 2020
mp911de added a commit that referenced this issue Nov 30, 2020
@mp911de
Introduce extended Keep-Alive options #1437
b08891d 
Lettuce now supports extended Keep-Alive options when using io_uring, epoll, or NIO. Extended NIO socket options are available on Java 11 or newer.

Also, refactor channel/EventLoopGroup initialization into a single place available from Transports.configureBootstrap.
@mp911de mp911de closed this as completed Nov 30, 2020
@mp911de mp911de mentioned this issue Jan 8, 2021
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@yangbodong22011
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@mp911de hello, I noticed DEFAULT_INTERVAL = 1, code see here.

But according to Linux kernel default parameter, it should be 75:

net.ipv4.tcp_keepalive_time=7200
net.ipv4.tcp_keepalive_intvl=75
net.ipv4.tcp_keepalive_probes=9

Not sure if it is reasonable to discuss this issue under the closed issue, if need to open a new issue, let me know.

@mp911de
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mp911de commented Mar 17, 2021

I'm not sure about the defaults. These seem to be different across platforms. It think it's fine to update the interval to 75. Feel free to submit a pull request.

@yangbodong22011
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thanks, i will submit a PR.

@yangbodong22011 yangbodong22011 mentioned this issue Mar 17, 2021
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yangbodong22011 added a commit to yangbodong22011/lettuce-core that referenced this issue Mar 17, 2021
@yangbodong22011
Change KeepAlive Default Interval to 75
a7821c0 
see
redis#1437 (comment)
mp911de pushed a commit that referenced this issue Mar 19, 2021
@yangbodong22011
Change default KeepAlive interval to 75 seconds #1671
0d6bddf 
see
#1437 (comment)
@yangbodong22011 yangbodong22011 mentioned this issue Apr 22, 2022
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