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https://issues.apache.org/jira/browse/DIRMINA-1069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16101140#comment-16101140
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Emmanuel Lecharny commented on DIRMINA-1069:
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One thing is important to understand : you can use a {{Connector}} to connect
to many remote hosts. In order to allow such a thing, the {{Connector}}
internally will create more than a thread (actually, it defaults to Nb
processors +1 threads being created : if you are running with 4 processors,
that is 5 threads. This is configurable).
In any case, each connection to a remote host will eat a socket, which will be
a linux file descriptor.
Also note that the linux limit is configurable, and if you really need to
exceed the default limit (which should be 2000, I think), then there is nothing
bad in tuning this parameter : you are not a 'normal' linux user.
Still, I'd like to see a {{lsof}} run on yoru process id, to get a glance at
what your process is using.
> Number of pipe and eventpoll goes up about 30 when connecting to server with
> NioSocketConnector
> ------------------------------------------------------------------------------------------------
>
> Key: DIRMINA-1069
> URL: https://issues.apache.org/jira/browse/DIRMINA-1069
> Project: MINA
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.0.3, 2.0.16
> Environment: Linux version 2.6.32-431.el6.x86_64(CentOS 65)
> Java 1.7.0_75
> Reporter: Wenzhi Wu
> Priority: Critical
> Attachments: After connecting to server successfully.PNG, Before
> connecting to server.PNG, File descriptors.PNG
>
>
> When connecting to server with NioSocketConnector,number of pipe and
> eventpoll goes up about 30.When I connect 1000 times,it will consume more
> file handles,finally exceed linux maximum limits.I think,maybe it is worser.
> Before connecting to server,number of file descriptors is 269.After it,it
> becomes 301.
> So,how did everybody solve it?
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