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[jira] [Commented] (ARIES-1804) Timeout due to connection loss in RSA fastbin provider?


    [ https://issues.apache.org/jira/browse/ARIES-1804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16496321#comment-16496321 ] 

Johannes Utzig commented on ARIES-1804:
---------------------------------------

It doesn't sound like Zookeeper (or the connection to it) is the problem here.

Zookeeper is just used for sharing the information which services are exported, it is not used for the actual remote configuration.

If the zookeeper connection broke down, the remote services should get deregisted, not stop working.

To me this sounds like e.g. a firewall is dropping the connection at some point, maybe due to inactivity.

You should check the firewall settings/logs.

I don't know how long it takes you to reproduce this, but you could test the theory by invoking a simple remote service every minute or so, to see if the periodic traffic prevents the firewall from dropping the connection. If the authentication service works correctly after that, it definetly sounds like firewall/iptables

> Timeout due to connection loss in RSA fastbin provider?
> -------------------------------------------------------
>
>                 Key: ARIES-1804
>                 URL: https://issues.apache.org/jira/browse/ARIES-1804
>             Project: Aries
>          Issue Type: Bug
>          Components: Remote Service Admin
>    Affects Versions: rsa-1.12.0
>         Environment: Karaf 4.2.0
> RSA 1.12.0
> zookeeper 3.4.12
> java 1.8.0_172-b11
> RHEL 7.5
>            Reporter: Alex Weirig
>            Priority: Critical
>         Attachments: AuthenticationServiceImpl.txt, LoginView.txt, stacktrace.txt, zoo.cfg.txt
>
>
> Hello,
> I'm running two karaf (4.2.0) servers, one is running the frontend of my application, the second one is running the backend.
> The backend services are published to 3 clustered zookeeper (3.4.12) servers. In karaf I have deployed the following RSA features:
> karaf@appsrvtlk()> feature:list | grep rsa
> aries-rsa-core │ 1.12.0 │ │ Started │ aries-rsa-1.12.0 │
> aries-rsa-provider-tcp │ 1.12.0 │ │ Uninstalled │ aries-rsa-1.12.0 │
> aries-rsa-provider-fastbin │ 1.12.0 │ x │ Started │ aries-rsa-1.12.0 │
> aries-rsa-discovery-local │ 1.12.0 │ │ Uninstalled │ aries-rsa-1.12.0 │
> aries-rsa-discovery-config │ 1.12.0 │ │ Uninstalled │ aries-rsa-1.12.0 │
> aries-rsa-discovery-zookeeper │ 1.12.0 │ x │ Started │ aries-rsa-1.12.0 │
> aries-rsa-discovery-zookeeper-server │ 1.12.0 │ │ Uninstalled │ aries-rsa-1.12.0 │
> When I start my karaf servers everything is working fine and my frontend can call my backend service and gets the result. But after some time (I can't figure out when) it seems that the connections between the karaf and zookeeper gets lost and I'm getting a timeout when I call my remote service eventhough all the servers (karaf and zookeepers) are still available and responding. Exhibitor shows no apparent issues with the zookeepers.
> I have attached the 
>  * relevant parts of my LoginView UI where I declared the @Reference to my service and where I call the remote service
>  * relevant parts of my AuthenticationService implementation that should be called on the remote karaf
>  * the stacktrace that I'm getting on the frontend karaf when the timeout occurs
>  * my zoo.cfg file
> From the stacktrace one can see that the LoginView has a non-null fastbin proxy handler for the authentication service but that after 5 minutes a timeout occurs and there is no line in the log that shows that the remote service was actually called.
> Many thanks in advance for your support.
> Kind regards,
> Alex



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