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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CLOUDSTACK-9348) CloudStack Server degrades when a lot of connections on port 8250
Date Mon, 16 May 2016 21:22:12 GMT

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-9348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15285335#comment-15285335
] 

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

Github user swill commented on the pull request:

    https://github.com/apache/cloudstack/pull/1493#issuecomment-219551825
  
    I think I am going to have to revert this PR because it seems to be responsible for the
`addHost` issue I am having in all my CI environments while doing DeployDC.  On completely
new deployments, I got the `addHost` error on all 6 of my CI environments with #1493 included.
 I have noticed this as an intermittent issue for the last while, but could not isolate it.
    
    I have reverted #1493 (and it's descendants) locally and I have not had the error in my
first 3 tests after reverting it.  I only started seeing the problem after #1493. 
    
    With the freeze basically here, I need my CI environments in action cause I have a few
PRs that I really want to run before I merge and freeze...
    
    This is what I plan to run to revert (brackets are for reference, not to be run):
    ```
    git revert 540d9572fd491db3ce182d26636fc74ada4e171c       (1543)
    git revert f88cb880974fa56866492c437af291e40bd1a4f6 -m 1  (1538)
    git revert 9f970f28b18534dffe33196ead60ea861f501fa9 -m 1  (1534)
    git revert 7ce0e10fbcd949375e43535aae168421ecdaa562 -m 1  (1493)
    ```


> 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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