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https://issues.apache.org/jira/browse/TS-4102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15074144#comment-15074144
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Kit Chan commented on TS-4102:
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I still have not downloaded it and tried it out. But I took a quick look
1) we have built-in sha1/sha1_bin functions -
https://docs.trafficserver.apache.org/en/latest/admin-guide/plugins/ts_lua.en.html#ts-sha1
But we don't have hmac functions. Not sure if it helps you or not.
2) The modules have many stuffs to pre-compute to begin with. These need to be
executed for the 256 VMs before ATS finishes starting up. It probably just
takes too long. https://github.com/kikito/sha1.lua/blob/master/sha1.lua#L37 .
ATS traffic manager will try to restart the ATS if the server is not detected
to be up and running after a while
3) You can try to increase this -
https://docs.trafficserver.apache.org/en/latest/admin-guide/files/records.config.en.html#proxy-config-cop-init-sleep-time
or decrease the number of Lua VM to see if the server will finally come up if
you still want to use PRELOAD_CACHE.
If you can try out the above, it would be great. Let me know if you continue to
have problems. Then I will really try to run this live myself to take a deeper
look.
> sha1.lua cause ts_lua dead loop
> -------------------------------
>
> Key: TS-4102
> URL: https://issues.apache.org/jira/browse/TS-4102
> Project: Traffic Server
> Issue Type: Bug
> Components: Lua, Plugins
> Reporter: James Fang
> Assignee: Kit Chan
> Fix For: sometime
>
>
> Requiring sha1 from https://luarocks.org/modules/kikito/sha1
> in global hook mode would cause ts_lua to dead-loop and 100% cpu util, then
> killed by TM & restarted.
> This creates a "start -> high cpu dead-loop -> killed" dead end.
> By chaning "local PRELOAD_CACHE = true" in sha1.lua to "local PRELOAD_CACHE =
> false", ts_lua will started successfully.
> i am not sure if this is a bug of luajit/sha1/ts_lua, but requires sha1 from
> bare luajit command-line without disable PRELOAD_CACHE works fine.
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