[jira] [Commented] (CLOUDSTACK-9348) CloudStack Server degrades when a lot of connections on port 8250

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-9348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15351857#comment-15351857 ] 

ASF GitHub Bot commented on CLOUDSTACK-9348:
--------------------------------------------

Github user swill commented on the issue:

    https://github.com/apache/cloudstack/pull/1549
  
    I think I am going to revert this PR.  We are having intermittent issues with it still and I am not confident running a production environment with this in place at this time, so I don't think I can justify leaving it in without us doing some more testing to figure out what is going on.
    
    I have had a few reports like this as people test 4.9, which are concerning:
    > NIO SSL agent not connecting. when I telnet to 8250, the agent immediately came up without me having to restart it.
    
    I am also still periodically getting the `addHost` issue we thought we had resolved previously.
    
    After I revert his, can you create a new PR with this same code so we can start getting more concrete testing on it and we can start consolidating some logs when it misbehaves?  


> CloudStack Server degrades when a lot of connections on port 8250
> -----------------------------------------------------------------
>
>                 Key: CLOUDSTACK-9348
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-9348
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>            Reporter: Rohit Yadav
>            Assignee: Rohit Yadav
>             Fix For: 4.9.0
>
>
> An intermittent issue was found with a large CloudStack deployment, where servers could not keep agents connected on port 8250.
> All connections are handled by accept() in NioConnection:
> https://github.com/apache/cloudstack/blob/master/utils/src/main/java/com/cloud/utils/nio/NioConnection.java#L125
> A new connection is handled by accept() which does blocking SSL handshake. A good fix would be to make this non-blocking and handle expensive tasks in separate threads/pool. This way the main IO loop won't be blocked and can continue to serve other agents/clients.



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