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From Emmanuel Lécharny <elecha...@gmail.com>
Subject Re: ftpserver warnings - cannot find an available passive port
Date Fri, 03 Jul 2015 11:51:05 GMT
Le 30/06/15 17:52, Michael Benovich a écrit :
> Hi,
> We have been running ftpserver 1.0.6 in a production environment for
> several years. Last week we encountered an issue that we have not
> encountered before.
> We began to see intermittent failures when trying to enter passive mode. A
> review of our logs showed multiple errors (sample trace below) with the
> warning "Failed to open passive data connection... (Cannot find an
> available passive port)". Our configuration includes a passive port range
> of 800 ports, and based on our internal metrics and "netstat" output, we do
> not believe we were using anywhere near this many ports at the time of
> these errors. Restarting our java application resolved the issue.

Have you changed the Java version you are using ? Or have you upgraded
your OS ? Or have you added some firewalls ?

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