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https://issues.apache.org/jira/browse/VCL-503?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andy Kurth updated VCL-503:
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Issue Type: Improvement (was: Bug)
Summary: Persistent SSH connection, add timeout to hung SSH processes
(was: Add timeout to hung SSH processes)
> Persistent SSH connection, add timeout to hung SSH processes
> ------------------------------------------------------------
>
> Key: VCL-503
> URL: https://issues.apache.org/jira/browse/VCL-503
> Project: VCL
> Issue Type: Improvement
> Components: vcld (backend)
> Affects Versions: 2.2.1
> Reporter: Andy Kurth
> Assignee: Andy Kurth
> Fix For: 2.3
>
>
> SSH processes issued from the management node to the computer being loaded
> occasionally hang for a very long time or indefinitely. This causes the
> reservation process to hang.
> This problem usually occurs soon after the computer begins to respond to SSH
> after it has been reloaded. vcld detects that it is responding and begins to
> issue commands. The SSH service/daemon is probably still being initialized
> on the computer. The SSH command hangs and does not fail because it makes an
> initial connection, a hiccup occurs, and the SSH service on the computer runs
> normally. Setting SSH options such as ServerAlive* or TCPKeepAlive doesn't
> help because the computer responds to these messages.
> Code should be added to timeout the SSH command process after a configurable
> amount of time.
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