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https://issues.apache.org/jira/browse/FTPSERVER-481?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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David Brooker updated FTPSERVER-481:
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Attachment: Jmeter_testplan.zip
> Artificially running out of passive ports under load
> ----------------------------------------------------
>
> Key: FTPSERVER-481
> URL: https://issues.apache.org/jira/browse/FTPSERVER-481
> Project: FtpServer
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.1.0
> Environment: Windows 2008R2 virtual machine with 4GB RAM, 4 CPU
> cores. Oracle Java 1.8.0_121. FTP server configured for 200 users and passive
> mode ports specified between 3000-3600.
> Reporter: David Brooker
> Attachments: ftpd-full.xml, ftpd_pp_leak_snip.txt, heap.zip,
> Jmeter_testplan.zip
>
>
> When loading the FTP server with 200 users that are downloading files via
> FTPS in passive mode (implicit), the server eventually appears to run out of
> passive ports. FTPD log shows numerous instances of "cannot find an available
> passive port" (see txt attachment). While embedded, it appears the ftpd
> server also has a memory leak (separate heap dump available upon request -
> file is too large to attach)
> Can be reproduced using JMeter with the attached testplan/ftps plugin in
> roughly 35 minutes.
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