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https://issues.apache.org/jira/browse/FTPSERVER-116?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12544191
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Magnus Lind commented on FTPSERVER-116:
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The default ftpd.properties file is used so it should be the MINA-listener.
> OutOfMemoryError when clients disconnect without issuing a QUIT command.
> ------------------------------------------------------------------------
>
> Key: FTPSERVER-116
> URL: https://issues.apache.org/jira/browse/FTPSERVER-116
> Project: FtpServer
> Issue Type: Bug
> Components: Core
> Reporter: Magnus Lind
>
> I have done some memory profiling regarding this problem:
> The class org.apache.ftpserver.listener.ConnectionManagerImpl stores all
> connections it ceates in its conList member variable.
> Normally the connection is removed from conList when it is closed. However,
> this is only the case if the client issues a QUIT command before closing the
> connection.
> Connections for clients that don't issue a QUIT command before disconnecting
> are left in the conList variable and never removed.
> As far as I understand, It should be ok to disconnect without issuing a QUIT
> command.
> When enough connections are left in the conList variable the jvm runs out of
> memory.
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