Need help with unknown problem.

Basically what happens is I get this message spam over and over in my console and from time to time it leads to crash my server.

Code:

2012-04-02 16:19:11 [SEVERE] java.net.ConnectException: Connection refused
2012-04-02 16:19:11 [SEVERE] at java.net.PlainSocketImpl.socketConnect(Native Method)
2012-04-02 16:19:11 [SEVERE] at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
2012-04-02 16:19:11 [SEVERE] at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
2012-04-02 16:19:11 [SEVERE] at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
2012-04-02 16:19:11 [SEVERE] at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
2012-04-02 16:19:11 [SEVERE] at java.net.Socket.connect(Socket.java:529)
2012-04-02 16:19:11 [SEVERE] at java.net.Socket.connect(Socket.java:478)
2012-04-02 16:19:11 [SEVERE] at sun.net.NetworkClient.doConnect(NetworkClient.java:163)
2012-04-02 16:19:11 [SEVERE] at sun.net.www.http.HttpClient.openServer(HttpClient.java:394)
2012-04-02 16:19:11 [SEVERE] at sun.net.www.http.HttpClient.openServer(HttpClient.java:529)
2012-04-02 16:19:11 [SEVERE] at sun.net.www.http.HttpClient.<init>(HttpClient.java:233)
2012-04-02 16:19:11 [SEVERE] at sun.net.www.http.HttpClient.New(HttpClient.java:306)
2012-04-02 16:19:11 [SEVERE] at sun.net.www.http.HttpClient.New(HttpClient.java:323)
2012-04-02 16:19:11 [SEVERE] at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:970)
2012-04-02 16:19:11 [SEVERE] at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:911)
2012-04-02 16:19:11 [SEVERE] at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:836)
2012-04-02 16:19:11 [SEVERE] at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1172)
2012-04-02 16:19:11 [SEVERE] at me.geqoo.multiinvpages.Blacklist.run(Blacklist.java:55)

Any idea what it is?
Thanks.

Fixed it removed multiinvpages plugin.
Full log was too big to put up

 

at me.geqoo.multiinvpages.Blacklist.run(Blacklist.java:55)

i have no idea

 

That doesnt look like the full error. Can you post the same thing but with 20 lines before and after the error occurs?

 

Lets see the full log like Sayshal said.

 

ok 1 Second I will try removing the multiinvpages plugin and see what happens