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https://issues.apache.org/jira/browse/CLOUDSTACK-9348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15274516#comment-15274516
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ASF subversion and git services commented on CLOUDSTACK-9348:
-------------------------------------------------------------
Commit 9f970f28b18534dffe33196ead60ea861f501fa9 in cloudstack's branch
refs/heads/master from [[email protected]]
[ https://git-wip-us.apache.org/repos/asf?p=cloudstack.git;h=9f970f2 ]
Merge pull request #1534 from shapeblue/niotest-fix
CLOUDSTACK-9348: Optimize NioTest and NioConnection main loop- Reduces SSL
handshake timeout to 15s, previously this was only 10s in
commit debfcdef788ce0d51be06db0ef10f6815f9b563b
- Adds an aggresive explicit wakeup to save the Nio main IO loop/handler from
getting blocked
- Fix NioTest to fail/succeed in about 60s, previously this was 300s
- Due to aggresive wakeup usage, NioTest should complete in less than 5s on most
systems. On virtualized environment this may slightly increase due to thread,
CPU burst/scheduling delays.
/cc @swill please review and merge.
Sorry about the previous values, they were not optimized for virtualized env.
The aggressive selector.wakeup will ensure main IO loop does not get blocked
even by malicious users, even for any timeout (ssl handshake etc).
* pr/1534:
CLOUDSTACK-9348: Optimize NioTest and NioConnection main loop
Signed-off-by: Will Stevens <[email protected]>
> 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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