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From "ASF subversion and git services (JIRA)" <>
Subject [jira] [Commented] (CLOUDSTACK-9348) CloudStack Server degrades when a lot of connections on port 8250
Date Tue, 24 May 2016 09:50:14 GMT


ASF subversion and git services commented on CLOUDSTACK-9348:

Commit 570b676b1fd9bb932825e43f1844e147b1ddf7f6 in cloudstack's branch refs/heads/4.9-bountycastle-daan
from []
[;h=570b676 ]

Merge pull request #1549 from shapeblue/nio-fixagain-singlepr

CLOUDSTACK-9348: NioConnection improvementsReopened PR with squashed changes for a re-review
and testing after and sub-sequent PRs got reverted

* pr/1549:
  CLOUDSTACK-9348: NioConnection improvements

Signed-off-by: Will Stevens <>

> CloudStack Server degrades when a lot of connections on port 8250
> -----------------------------------------------------------------
>                 Key: CLOUDSTACK-9348
>                 URL:
>             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:
> 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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