java.net.ConnectException thrown

[Michael McGrady]

Very nice!  Thank you, Trustin.

Mike

On Sep 17, 2009, at 5:06 PM, Trustin Lee (이희승) wrote:

> I hope this post answers the first question.
>
> http://gleamynode.net/articles/1557/
>
> I'm not sure about the other questions though. :)
>
> — Trustin Lee, http://gleamynode.net/
>
>
>
> On Fri, Sep 18, 2009 at 2:37 AM, Michael McGrady
> <mmcgrady at topiatechnology.com> wrote:
>> What is the impact of changing these settings?  Why is the default  
>> low
>> instead of hight?  And, any other questions I should be asking before
>> changing this configuration?
>> MIke
>> On Sep 17, 2009, at 10:34 AM, J. Mi wrote:
>>
>> H Thomas,
>>
>> Thanks for the lead. To be able to have more connections before  
>> seeing
>> "java.net.ConnectException: Connection refused...", which  
>> configuration I
>> need to change in /etc/security/limits.conf? I added
>> * soft nofile 20000
>> * hard nofile 20000
>>
>> and first time just tried to re-login, the new limit didn't work  
>> for me for
>> more connections. I then tried to restart my VMware. It still  
>> didn't work
>> for me
>>
>> Does 'nofile' (max number of open files) have anything to do with  
>> socket
>> connections?
>>
>> Appreciate if you or anyone else can guide me more on this.
>> btw, if any of you know any equivalent OS settings on Windows, i'll  
>> try that
>> as well.
>>
>> Jason
>>
>>
>> On Wed, Sep 16, 2009 at 3:38 PM, Thomas Bocek <bocek at ifi.uzh.ch>  
>> wrote:
>>>
>>> Hi J.,
>>>
>>> This might be a limitation of the OS. If you are using for example
>>> Linux, then you can only open about 1000 connections before seeing  
>>> "too
>>> many open files in system" error messages. You can adjust the  
>>> value in
>>> /etc/security/limits.conf
>>>
>>> Thomas
>>>
>>> J. Mi wrote:
>>>> All,
>>>>
>>>> I get following exception pretty consistently when trying to
>>>> concurrently
>>>> connect about 800 connections.
>>>>
>>>> Any idea? Is this something out of Netty's control? If so, is  
>>>> there some
>>>> configuration I could do to JVM or operating system to increase  
>>>> resource
>>>> capacity?
>>>>
>>>> Thanks,
>>>> Jason
>>>>
>>>> java.net.ConnectException: Connection refused: no further  
>>>> information
>>>>         at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
>>>>         at sun.nio.ch.SocketChannelImpl.finishConnect(Unknown  
>>>> Source)
>>>>         at
>>>>
>>>> org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink 
>>>> $Boss.connect(NioClientSocketPipelineSink.java:381)
>>>>         at
>>>>
>>>> org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink 
>>>> $Boss.processSelectedKeys(NioClientSocketPipelineSink.java:351)
>>>>         at
>>>>
>>>> org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink 
>>>> $Boss.run(NioClientSocketPipelineSink.java:273)
>>>>         at
>>>>
>>>> org 
>>>> .jboss 
>>>> .netty 
>>>> .util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:113)
>>>>         at
>>>>
>>>> org 
>>>> .jboss 
>>>> .netty.util.internal.IoWorkerRunnable.run(IoWorkerRunnable.java:53)
>>>>         at
>>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown
>>>> Source)
>>>>         at java.util.concurrent.ThreadPoolExecutor 
>>>> $Worker.run(Unknown
>>>> Source)
>>>>         at java.lang.Thread.run(Unknown Source)
>>>>
>>>>
>>>>
>>>> ------------------------------------------------------------------------
>>>>
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>> Mike McGrady
>> Principal Investigator AF081-028 AFRL SBIR
>> Senior Engineer
>> Topia Technology, Inc
>> 1.253.720.3365
>> mmcgrady at topiatechnology.com
>>
>>
>>
>>
>>
>>
>>
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>
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Mike McGrady
Principal Investigator AF081-028 AFRL SBIR
Senior Engineer
Topia Technology, Inc
1.253.720.3365
mmcgrady at topiatechnology.com