Actor threw excecption

[Diego Medina]

Hi,

Has anyone run into this error while running Lift 3.0 and jetty 9.3.8 ? :

Jan 04 11:46:03 acm-web-02 web:  ERROR net.liftweb.actor.ActorLogger - [ ]: Actor threw an exception

Jan 04 11:46:03 acm-web-02 web:  java.lang.NullPointerException: null

full error:

https://gist.github.com/fmpwizard/67372e508b714d19fb02d3f258550198

It's one of those terrible errors, doesn't happen all the time, doesn't point to any of our own code and we haven't been able to reproduce it.

While writing this email I noticed there is a newer version of jetty, so I'll see about upgrading to it, but figured it wouldn't hurt to post this here.

Thanks

--

Diego Medina
Lift/Scala Consultant
di...@fmpwizard.com
https://blog.fmpwizard.com/

[Matt Farmer]

This actually does point to some of our own code.

net.liftweb.http.provider.servlet.containers.Servlet30AsyncProvider.resume

If I had to guess something changed in Jetty with resuming async requests? Who is most familiar with this code?

—
Matt Farmer | Blog | Twitter
GPG: CD57 2E26 F60C 0A61 E6D8  FC72 4493 8917 D667 4D07

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[Diego Medina]

now that you mentioned, I see that

https://github.com/lift/framework/blob/master/web/webkit/src/main/scala/net/liftweb/http/provider/servlet/containers/Servlet30AsyncProvider.scala#L118

has a try/catch, and there we assume that resume could fail, so we could start the try a bit earlier to account for the case of the Null on line 115

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Lift, the simply functional web framework: http://liftweb.net
Code: http://github.com/lift
Discussion: http://groups.google.com/group/liftweb
Stuck? Help us help you: https://www.assembla.com/wiki/show/liftweb/Posting_example_code

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[Diego Medina]

just an update, upgrading to lift 3.0.1 and latest jetty did not solve the issue.