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https://issues.apache.org/jira/browse/FTPSERVER-264?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Niklas Gustavsson closed FTPSERVER-264.
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Resolution: Fixed
Fix Version/s: 1.0.6
Fixed in rev 1137251 and 1137252.
> It takes about 1 minute and 100% CPU to set a "wide" passive port range
> (org.apache.ftpserver.DefaultDataConnectionConfiguration$Passive.SetPorts())
> ----------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: FTPSERVER-264
> URL: https://issues.apache.org/jira/browse/FTPSERVER-264
> Project: FtpServer
> Issue Type: Bug
> Components: Server
> Affects Versions: 1.0.0-M2
> Environment: Windows
> Reporter: Fred Moore
> Assignee: Niklas Gustavsson
> Fix For: 1.0.6, 1.1.0
>
>
> We observed a long (about 1 minute) plateau of 100% CPU when trying to
> setPorts() in org.apache.ftpserver.DefaultDataConnectionConfiguration$Passive
> with "wide" port ranges such as 2122-65535.
> We observed that FTPServer internally performs an apparently very expensive
> scan on this range.
> Can this be made less CPU intensive and quicker (to shorten server downtime
> and reduce resource consumption in production)?
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