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https://issues.apache.org/jira/browse/DIRMINA-831?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13025700#comment-13025700
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Niklas Gustavsson commented on DIRMINA-831:
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I can confirm this behavior, with both 2.0.2 and 2.0.3. The sockets can be seen
from netstat /a
TCP niklas-winxp2:1050 localhost:1051 TIME_WAIT
TCP niklas-winxp2:1052 localhost:1053 TIME_WAIT
TCP niklas-winxp2:1054 localhost:1055 TIME_WAIT
TCP niklas-winxp2:1056 localhost:1057 ESTABLISHED
TCP niklas-winxp2:1057 localhost:1056 ESTABLISHED
TCP niklas-winxp2:1058 localhost:1059 ESTABLISHED
TCP niklas-winxp2:1059 localhost:1058 ESTABLISHED
TCP niklas-winxp2:1060 localhost:1061 ESTABLISHED
TCP niklas-winxp2:1061 localhost:1060 ESTABLISHED
And, as shown in the video, they occur when the connector is created and the
established sockets gets closed as soon as the connector is disposed.
On OS X, I don't see this behavior.
> NioSocketConnector create unused Connections, even when #connect(..) is not
> called.
> -----------------------------------------------------------------------------------
>
> Key: DIRMINA-831
> URL: https://issues.apache.org/jira/browse/DIRMINA-831
> Project: MINA
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.0.2
> Environment: win32, x86, winXP
> Reporter: Christian Schwarz
> Attachments: DIRMINA-831.avi, DIRMINA-831.jpg
>
>
> Hello,
> we are using Mina to access different types of network devices (Webcams,
> Digital-IO-Boxes, Access Control Systems,...). For every type of device we
> use a dedicated IoConnector because of the different protocols. Under some
> circumstances we get an "java.net.SocketException: No buffer space available
> (maximum connections reached?): connect". We figured out that for every
> created NioSocketConnector 8 connections will be created from localhost to
> localhost with different ports, even if we do no connect at all. So if we use
> many NioSocketConnector's we quickly run out of available ports, i guess.
> Is it possible to tune the NioSocketConnector so it only opens a port when
> we call #connect(..) ?
> Thanks in advance
> Chris
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