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From "Sebb (JIRA)" <j...@apache.org>
Subject [jira] Commented: (NET-258) Implement A Keepalive Mechanism
Date Wed, 16 Feb 2011 10:18:57 GMT

    [ https://issues.apache.org/jira/browse/NET-258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12995236#comment-12995236
] 

Sebb commented on NET-258:
--------------------------

FYI - BufferedReader.readLine() is not thread-safe in Java 1.5 (and earlier): http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5073414
This was due to an update window (as well as unsafe publication).

This appears to have been fixed in Java 1.6

> Implement A Keepalive Mechanism
> -------------------------------
>
>                 Key: NET-258
>                 URL: https://issues.apache.org/jira/browse/NET-258
>             Project: Commons Net
>          Issue Type: Improvement
>    Affects Versions: 2.0
>            Reporter: Rory Winston
>            Assignee: Rory Winston
>         Attachments: ftp-keepalive.diff
>
>
> For routers/firewalls that terminate idle connections, a separate heartbeat mechanism
may need to be implemented to keep the control connection active.
> Some potential issues:
> * Synchronization between a heartbeat write and a __getReply() on an active control connection
command;
> * Should use the NOOP command as a heartbeat signal;
> * Make the timeout configurable;
> * Default SocketImpl::setKeepAlive() wont do here.

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