Niklas Gustavsson commented on FTPSERVER-116:

Is this using the MINA or IO 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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