RMI connectivity problem (multi-NIC)
I'm developing a simple photo share program with Java RMI.
I connect rmiregistry (192.168.100.3), it returns the object reference, but when I invoke a method I get problems.
My server (remote) - 192.168.100.3 - reply with an address of another NIC - 192.168.62.1 (from VMware). I print out the Proxy object, and I was surprised when I saw 192.167.62.1 address, instead 192.168.100.3. My client is running on 192.168.100.1 address.
Why is this happening?
When I turned off the VMware virtual NICs, I was successful. I want to understand what is going on, and if is there a way to fix this issue.
$ java rmi.Client
Looking...object found!
Proxy[PhotoShare,RemoteObjectInvocationHandler[UnicastRef [liveRef: [endpoint:[192.168.62.1:58343](remote),objID:[4cc5973e:11de2bb065b:-7fff, 4037313925566802436]]]]]
Exception in thread "main" java.rmi.ConnectIOException: Exception creating connection to: 192.168.62.1; nested exception is:
java.net.SocketException: Network is unreachable
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:614)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:198)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:184)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:110)
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:178)
at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:132)
at $Proxy0.listaFotos(Unknown Source)
at rmi.Client.main(Client.java:26)
Caused by: java.net.SocketException: Network is unreachable
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:519)
at java.net.Socket.connect(Socket.java:469)
at java.net.Socket.<init>(Socket.java:366)
at java.net.Socket.<init>(Socket.java:180)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:22)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:128)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:595)
... 7 moreEdited by: pantony on Nov 28, 2008 3:26 AM
Edited by: pantony on Nov 28, 2008 3:27 AM
See item A.1 of the [RMI FAQ|http://java.sun.com/j2se/1.5.0/docs/guide/rmi/faq.html].
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here we are:
import com.ms.wfc.app.Application;
import java.io.*;
import java.net.*;
import java.rmi.Naming;
import java.util.Properties;
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import java.rmi.RemoteException;
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class serialVersionUID=2825328378974757378]]]]
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Cameron Taggart wrote:
WebLogic 5.1.0 with service pack 8 has been installed on a HPUX server. I'm
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[java.io.InvalidClassException:
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class serialVersionUID=2825328378974757378]]]]
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Anyone have any idea what going on in this situation?
Cameron Taggart -
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====================================
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[Wed Oct 11 14:38:53 SGT 2006 darkstar] ERROR calling: NetworkTestClient.performTest() called: Naming.lookup() args: rmi://nc_apps5.ncc.shs.com.sg:10000/RMITest
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at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)
at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)
If anything the second scenario should work, because both the server and the client are in the subnet i.e 10.224.x.x. but it turns to be the opposite. Can anyone
tell me what gives over here.
Many Thanks in advance
Henley from Singapore. National Cancer Center.Thanks for pointing that out. its not a mistake. I do not have access to the source of the application. However I am wondering why is the client trying to connect back to itself in the second scenario when its supposed to be connecting to 10.224.100.18. ip of the server.
Its very strange because the connection was apparently successful when
the the client tries to connect to 203.126.56.80. instead of 10.224.100.18 i.e no error.
is there anycode in the RMI that says, if server is in the same ip as me, try connecting to myself first ?
once again thanks in advance. -
RMI Connection Refused through Firewall
Hi,
I am having problems making an RMI connection through a firewall. On the server outside the firewall I have my servlet application running in an OC4J container and inside the firewall I have an EJB listening on port 6666. I have setup the firewall to allow connections through on port 6666. If I telnet from the machine outside the firewall on port 6666 I am able to make a connection to the EJB. So I know the firewall has been setup to handle the connection.
I run the servlet application and when it tries to make the connection it gives an error:
javax.naming.NamingException: Lookup error: java.net.ConnectException: Connection refused; nested exception is:
java.net.ConnectException: Connection refused
When I do a snoop on the external machine to see what data is trying to be sent to the internal machine there is no data. When doing the telnet test there was data.
I have the same servlet application deployed on a machine internally and it is able to make a connection to the EJB. The only problem is either the configuration of the application server on the external machine or the firewall configuration.
Anyone able to help me see what I am missing?
Thanks
Shawn Clarknot sure what you mean by having a 'EJB listening' on port 6666. Do you mean actually having a socket listening within the EJB code? If so then that is a suspicious EJB activity.
If not then i guess you mean the ORMI listening port of the OC4J application. This is normally set on port 23791 to allow the RMI communication to flow.
-lp -
Timeouts and connection problems after 5.1(2) upgrade
AIM/chat and some other programs are having timeout/connection problems after upgrade to 5.1(2). I am using S241 also. The connection problems stopped when the IPS was set to bypass. Rebuilt IPS and left sigs at default settings and problem is still happening. I am not seeing any of the IPs that are having the problem in the Event Viewer or on the Events in the IDM.
Any known issues with the 5.1(2) that would cause this type of problem?I don't know specifically, but I did notice that 5.1(3) was released today.
-
Hi, i am having trouble with my mac mail account, i cannot send or receive any emails because of the server connection problems. Message says it could not be connected to SMTP server. Thanks in advance for your help.
Hello Sue,
I have an iPad 3, iPad Mini and iPhone 5S and they are all sluggish on capitalisation using shift keys. I hope that Apple will solve the problem because it is driving me crazy.
I find using a Microsoft Surface and Windows 8 phone, which I also have, work as well as all the ios devices before the ios 7 upgrade.
It has something to do with the length of time that you need to hold the shift key down. The shift key needs to be held longer than the letter key for the capitalisation to work. For some reason, this is a major change in the way we have learnt to touch type on computers. I am having to relearn how to type!
Michael -
RFC Receiver adpater Connection problem , Help us to solve ?
Hi Friends ,
Our scenarilo is Mail to RFC. It was running fine. In RFC Receiver adapter i have given <b>Maximium connection property to 1</b> .
While multiple set data passed to rfc will connection problem will come ?
Most data not uploaded . I am getting the following error.
<b> If i set max connection to 5 . It is 5 times or more than that it is pusing the data .</b>
i am getting the following error <b>while i set the Max connection to 1 .</b> . <b>Any other place i need to change configuration ?</b>
<i><b> - Error: 2007-09-24 10:51:22 GMT-05:30: Message processed for interface YRFC_EXT_WARR: com.sap.aii.af.rfc.afcommunication.RfcAFWException: error while processing message to remote system:com.sap.aii.af.rfc.core.client.RfcClientException: resource error: could not get a client from JCO.Pool: com.sap.mw.jco.JCO$Exception: (106) JCO_ERROR_RESOURCE: Connection pool RfcClient[CC_EXTE_WAREN_2W_RFC_RECEIVER]e7fa21f86ec535e883636c0beffc0f0c is exhausted. The current pool size limit (max connections) is 1 connections.</b></i>
Please give the description . I have referred many likns . Help us to solve this problem .
Regards.,
V.Rangarajan<b></b>
Message was edited by:
ranga rajanHi,
Have a look at this.This will help you.
1.
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/f3f93ee7-0c01-0010-2593-d7c28b5377c2
2. https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/3103eb90-0201-0010-71af-be6f4a6f61d1
Regards,
Akshay Jamgaonkar.
Reward points if find useful.
Message was edited by:
Akshay Jamgaonkar -
PHP and MySQL Connection problem
I am trying to make a PHP MySQL on a remote server connection in Dreamwesaver CS3.
When I enter the information (host, user, password, etc.) and hit TEST, I get the following error message.
"Access Denied. The file may not exist, or there could be a permission problem. Make sure you have proper authorization on the server and the server is properly configured."
I know the user, password, etc. work, as I can access the MySQL database with other software.
I checked with my host and they say there are no permission problems on their end.
I have checked the settings on the Test Server page in Site Setup and everything looks correct and works there.
I have not seen this particular problem described in other forum postings (although there are a LOT of postings on this topic!).
Any help would be appreciated.I thought my testing server was the remote server and is always on as far as I know. I don't know how to turn it on or off.
Is there some other testing server that I should be aware of?
Frank
Date: Wed, 3 Jun 2009 15:43:02 -0600
From: [email protected]
To: [email protected]
Subject: PHP and MySQL Connection problem
I know you are using remote, but is your testing server on? if not turn that on and see if that does it. it just happened to me working on remote server and could not get mysql conn to work, until I turn on my testing (developer server), then I was able to connect to mysql and the tables that I created in phpmyadmin remotly was downloaded.
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