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Posted to dev@mina.apache.org by "Fred Moore (JIRA)" <ji...@apache.org> on 2009/01/14 17:52:06 UTC

[jira] Created: (FTPSERVER-264) It takes about 1 minute and 100% CPU to set a "wide" the passive port range (org.apache.ftpserver.DefaultDataConnectionConfiguration$Passive.SetPorts())

It takes about 1 minute and 100% CPU to set a "wide" the passive port range (org.apache.ftpserver.DefaultDataConnectionConfiguration$Passive.SetPorts())
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                 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 in production)?

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[jira] Updated: (FTPSERVER-264) It takes about 1 minute and 100% CPU to set a "wide" passive port range (org.apache.ftpserver.DefaultDataConnectionConfiguration$Passive.SetPorts())

Posted by "Fred Moore (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/FTPSERVER-264?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fred Moore updated FTPSERVER-264:
---------------------------------

    Summary: It takes about 1 minute and 100% CPU to set a "wide" passive port range (org.apache.ftpserver.DefaultDataConnectionConfiguration$Passive.SetPorts())  (was: It takes about 1 minute and 100% CPU to set a "wide" the passive port range (org.apache.ftpserver.DefaultDataConnectionConfiguration$Passive.SetPorts()))

> It takes about 1 minute and 100% CPU to set a "wide" passive port range (org.apache.ftpserver.DefaultDataConnectionConfiguration$Passive.SetPorts())
> ----------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: FTPSERVER-264
>                 URL: https://issues.apache.org/jira/browse/FTPSERVER-264
>             Project: FtpServer
>          Issue Type: Bug
>          Components: Server
>    Affects Versions: 1.0.0-M2
>         Environment: Windows
>            Reporter: Fred Moore
>
> We observed a long (about 1 minute) plateau of 100% CPU when trying to setPorts() in org.apache.ftpserver.DefaultDataConnectionConfiguration$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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[jira] Updated: (FTPSERVER-264) It takes about 1 minute and 100% CPU to set a "wide" the passive port range (org.apache.ftpserver.DefaultDataConnectionConfiguration$Passive.SetPorts())

Posted by "Fred Moore (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/FTPSERVER-264?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Fred Moore updated FTPSERVER-264:
---------------------------------

    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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[jira] Updated: (FTPSERVER-264) It takes about 1 minute and 100% CPU to set a "wide" passive port range (org.apache.ftpserver.DefaultDataConnectionConfiguration$Passive.SetPorts())

Posted by "Niklas Gustavsson (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/FTPSERVER-264?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Niklas Gustavsson updated FTPSERVER-264:
----------------------------------------

    Fix Version/s: 1.1
         Assignee: Niklas Gustavsson

> It takes about 1 minute and 100% CPU to set a "wide" passive port range (org.apache.ftpserver.DefaultDataConnectionConfiguration$Passive.SetPorts())
> ----------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: FTPSERVER-264
>                 URL: https://issues.apache.org/jira/browse/FTPSERVER-264
>             Project: FtpServer
>          Issue Type: Bug
>          Components: Server
>    Affects Versions: 1.0.0-M2
>         Environment: Windows
>            Reporter: Fred Moore
>            Assignee: Niklas Gustavsson
>             Fix For: 1.1
>
>
> We observed a long (about 1 minute) plateau of 100% CPU when trying to setPorts() in org.apache.ftpserver.DefaultDataConnectionConfiguration$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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