[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=15241017#comment-15241017 ] 

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

Github user bhaisaab commented on the pull request:

    https://github.com/apache/cloudstack/pull/1493#issuecomment-209896417
  
    - Tested against KVM, mgmt server - KVM links and clustered management server
    - NioTest modified to have multiple clients against a server instance with just one worker and 10 malicious clients (they simply do a secure connect to the server and don't do anything else) trying to connect server per valid client
    - Ran Marvin smoke tests successfully against KVM


> 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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