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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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Fred Moore updated FTPSERVER-264:
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Description:
We observed a long (about 1 minute) plateau of 100% CPU when trying to
setPorts() in org.apache.ftpserver.DefaultDataConnectionConfiguration$Passive
with "wide" port ranges such as 2122-65535.
We observed that FTPServer internally performs an apparently very expensive
scan on this range.
Can this be made less CPU intensive and quicker (to shorten server downtime and
reduce resource consumption in production)?
was:
We observed a long (about 1 minute) plateau of 100% CPU when trying to
setPorts() in org.apache.ftpserver.DefaultDataConnectionConfiguration$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 in
production)?
> It takes about 1 minute and 100% CPU to set a "wide" the passive port range
> (org.apache.ftpserver.DefaultDataConnectionConfiguration$Passive.SetPorts())
> --------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: FTPSERVER-264
> URL: https://issues.apache.org/jira/browse/FTPSERVER-264
> Project: FtpServer
> Issue Type: Bug
> Components: Server
> Affects Versions: 1.0.0-M2
> Environment: Windows
> Reporter: Fred Moore
>
> We observed a long (about 1 minute) plateau of 100% CPU when trying to
> setPorts() in org.apache.ftpserver.DefaultDataConnectionConfiguration$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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