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https://issues.apache.org/jira/browse/GUACAMOLE-919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17153270#comment-17153270
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Douglas Heriot commented on GUACAMOLE-919:
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Sorry I've not looked at this for a while. I've just rebased my changes over 
the current master since the 1.2.0 release, and addressed the issues raised in 
the pull request review:

[https://github.com/apache/guacamole-client/pull/488]

I've also added a pull request that adds documentation for these new properties:

[https://github.com/apache/guacamole-manual/pull/146]

> An I/O error occurred while sending to the backend
> --------------------------------------------------
>
>                 Key: GUACAMOLE-919
>                 URL: https://issues.apache.org/jira/browse/GUACAMOLE-919
>             Project: Guacamole
>          Issue Type: Bug
>          Components: guacamole-auth-jdbc-postgresql
>    Affects Versions: 1.0.0
>            Reporter: Mechanix
>            Assignee: Nick Couchman
>            Priority: Minor
>         Attachments: image-2020-01-27-15-19-26-634.png
>
>
> Hi,
> we use guacamole with postgresql and openid extension. Guacamole and guacd is 
> deployed inside a k8s cluster.
> For some reason, the authentication doesn't succeed sporadically; there is 
> only a blank page and this error message in the guacamole log:
> *[pool-1-thread-1] WARN o.a.i.d.pooled.PooledDataSource - Execution of ping 
> query 'SELECT 1' failed: An I/O error occurred while sending to the backend.*
> I suspect there is a weird timeout happening between guacamole and postgresql 
> but couldn't figure out why.
> Any hints are much appreciated. Thanks
>  
>  



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