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From <pri...@samea.de>
Subject RE: too many open files
Date Tue, 25 May 2010 10:38:45 GMT
Hello,

I had a look at my servlet, but it closes the connection after
doing a request.

Further it crashes by opening the nameserver.

Thanks for your help.

br,

Markus


>privat@samea.de wrote:
>> Hello,
>> 
>> I have a problem with my little CORBA-Servlet.
>> Allways I get this error:
>> 
>> java.net.SocketException: Too many open files
>>     sun.nio.ch.Net.socket0(Native Method)
>>     sun.nio.ch.Net.socket(Net.java:97)
>>     sun.nio.ch.SocketChannelImpl.<init>(SocketChannelImpl.java:84)
>>     sun.nio.ch.SelectorProviderImpl.openSocketChannel(SelectorProviderImpl.java:37)

>> 
>>     java.nio.channels.SocketChannel.open(SocketChannel.java:105)
>>     java.nio.channels.SocketChannel.open(SocketChannel.java:145)
>>     com.sun.corba.se.impl.transport.DefaultSocketFactoryImpl.createSocket(DefaultSocketFactoryImpl.java:60)

>> 
>> com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.<init>(SocketOrChannelConnectionImpl.java:188)

>> 
>>     com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.<init>(SocketOrChannelConnectionImpl.java:218)

>> 
>>     com.sun.corba.se.impl.transport.SocketOrChannelContactInfoImpl.createConnection(SocketOrChannelContactInfoImpl.java:101)

>> 
>>     com.sun.corba.se.impl.protocol.CorbaClientRequestDispatcherImpl.beginRequest(CorbaClientRequestDispatcherImpl.java:152)

>> 
>>     com.sun.corba.se.impl.protocol.CorbaClientDelegateImpl.request(CorbaClientDelegateImpl.java:118)

>> 
>>     com.sun.corba.se.impl.protocol.CorbaClientDelegateImpl.is_a(CorbaClientDelegateImpl.java:211)

>> 
>>     org.omg.CORBA.portable.ObjectImpl._is_a(ObjectImpl.java:112)
>> 
>> I use: Tomcat 6.0.26 on Linux JVM: 1.6.0_20-b02
>> 
>At first sight, it doesn't look as if this is a Tomcat issue.  It seems 
>more of an issue within your servlet.
>Is this servlet opening its own connection to something else?
>If yes, then you probably forget to close this connection when you are 
>done with it, and they accumulate until the OS tells your process that 
>it has too many open sockets at the same time.
>
>Doing a "netstat -an" would probably provide more information.
>
>If you are under Unix/Linux, you can also try "lsof", but only studying 
>the options is already quite a challenge.
>
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