I'm trying to run a simple client-server program on two machines ,
I read this page but i got this errors :
Jun 04, 2012 6:43:10 PM com.sun.corba.se.impl.transport.SocketOrChannelConnectio
nImpl <init>
WARNING: "IOP00410201: (COMM_FAILURE) Connection failure: socketType: IIOP_CLEAR
_TEXT; hostname: xx.xx.xx.xx; port: 1050"
org.omg.CORBA.COMM_FAILURE: vmcid: SUN minor code: 201 completed: No
at com.sun.corba.se.impl.logging.ORBUtilSystemException.connectFailure(Unknown Source)
at com.sun.corba.se.impl.logging.ORBUtilSystemException.connectFailure(Unknown Source)
at com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.<init>(Unknown Source)
at com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.<init>(Unknown Source)
at com.sun.corba.se.impl.transport.SocketOrChannelContactInfoImpl.createConnection(Unknown Source)
at com.sun.corba.se.impl.protocol.CorbaClientRequestDispatcherImpl.beginRequest(Unknown Source)
at com.sun.corba.se.impl.protocol.CorbaClientDelegateImpl.request(Unknown Source)
at com.sun.corba.se.impl.resolver.BootstrapResolverImpl.invoke(Unknown Source)
at com.sun.corba.se.impl.resolver.BootstrapResolverImpl.resolve(Unknown Source)
at com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve(Unknown Source)
at com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve(Unknown Source)
at com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve(Unknown Source)
at com.sun.corba.se.impl.orb.ORBImpl.resolve_initial_references(Unknown Source)
at HelloClient.main(HelloClient.java:17)
Caused by: java.net.ConnectException: Connection refused: connect
at sun.nio.ch.Net.connect0(Native Method)
at sun.nio.ch.Net.connect(Unknown Source)
at sun.nio.ch.Net.connect(Unknown Source)
at sun.nio.ch.SocketChannelImpl.connect(Unknown Source)
at java.nio.channels.SocketChannel.open(Unknown Source)
at com.sun.corba.se.impl.transport.DefaultSocketFactoryImpl.createSocket(Unknown Source)
... 12 more
ERROR : org.omg.CORBA.COMM_FAILURE: vmcid: SUN minor code: 201 completed: No
org.omg.CORBA.COMM_FAILURE: vmcid: SUN minor code: 201 completed: No
at com.sun.corba.se.impl.logging.ORBUtilSystemException.connectFailure(Unknown Source)
at com.sun.corba.se.impl.logging.ORBUtilSystemException.connectFailure(Unknown Source)
at com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.<init>(Unknown Source)
at com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.<init>(Unknown Source)
at com.sun.corba.se.impl.transport.SocketOrChannelContactInfoImpl.createConnection(Unknown Source)
at com.sun.corba.se.impl.protocol.CorbaClientRequestDispatcherImpl.beginRequest(Unknown Source)
at com.sun.corba.se.impl.protocol.CorbaClientDelegateImpl.request(Unknown Source)
at com.sun.corba.se.impl.resolver.BootstrapResolverImpl.invoke(Unknown Source)
at com.sun.corba.se.impl.resolver.BootstrapResolverImpl.resolve(Unknown Source)
at com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve(Unknown Source)
at com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve(Unknown Source)
at com.sun.corba.se.impl.resolver.CompositeResolverImpl.resolve(Unknown Source)
at com.sun.corba.se.impl.orb.ORBImpl.resolve_initial_references(Unknown Source)
at HelloClient.main(HelloClient.java:17)
Caused by: java.net.ConnectException: Connection refused: connect
at sun.nio.ch.Net.connect0(Native Method)
at sun.nio.ch.Net.connect(Unknown Source)
at sun.nio.ch.Net.connect(Unknown Source)
at sun.nio.ch.SocketChannelImpl.connect(Unknown Source)
at java.nio.channels.SocketChannel.open(Unknown Source)
at com.sun.corba.se.impl.transport.DefaultSocketFactoryImpl.createSocket(Unknown Source)
... 12 more
Could you please let me know how can i run a simple program like " Hello Wrold " on two machines over internet using Corba and java?
Regards.
how can i run a simple program like " Hello Wrold " on two machines over internet using Corba and java?
I think over the internet is key here. You need to make sure that:
the server is accessible to the client on the IP address you specify (i.e. either the IP address is public, or there are appropriate masquarading rules set up on any relevant firewalls);
there are appropriate firewall and/or port forwarding rules that allow the client to access port 1050 on the server.
I would recommend to first get the client and the server working when run on the same subnet, and only then move on to a distributed setup.
Run orb start orbd -ORBInitialPort 1050
Run your class client and server with: -ORBInitialPort 1050 -ORBInitialHost localhost
or alternative:
1. Run server:
tnameserv -ORBInitialPort 1050
Run client:
java YourServer -ORBInitialPort 1050
java YourClient -ORBInitialHost 127.0.0.1 -ORBInitialPort 1050
a similar problem
Related
I am having trouble deploying MQTT with SSL over the internet but it works fine with local network.
Here is the scenario:
My Eclipse MQTT broker is deployed on client’s machine. Machine is in corporate intranet and has no internet access.
Let’s say it’s local IP address is 10.125.22.103, name is Enterprise. Broker is using 8883 port.
Client has external IP address of say 222.111.112.109 and is using port forwarding to forward request to deployment machine.
I used machine name Enterprise as a common name and generated the certificate files using steps at this link
http://www.steves-internet-guide.com/mosquitto-tls/
I imported the ca.crt file in a .jks file using KeyStore Explorer.
I am using sample code at this url:
https://github.com/eclipse/paho.mqtt.java/blob/master/org.eclipse.paho.sample.mqttv3app/src/main/java/org/eclipse/paho/sample/mqttv3app/Sample.java
Both broker and client work perfectly when used on same machine.
But when I try to connect to broker from internet through 222.111.112.109:8883 I get following error
2021-04-13 17:02:14:524 [ERROR] [MQTTListener_222.111.112.109:ID=28]:[MQTTListener.java:793] org.eclipse.paho.client.mqttv3.MqttException: MqttException
at org.eclipse.paho.client.mqttv3.internal.ExceptionHelper.createMqttException(ExceptionHelper.java:38)
at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:736)
at java.lang.Thread.run(Unknown Source)
Caused by: javax.net.ssl.SSLHandshakeException: java.security.cert.CertificateException: No subject alternative names present
at sun.security.ssl.Alerts.getSSLException(Unknown Source)
at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
at sun.security.ssl.Handshaker.processLoop(Unknown Source)
at sun.security.ssl.Handshaker.process_record(Unknown Source)
at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at org.eclipse.paho.client.mqttv3.internal.SSLNetworkModule.start(SSLNetworkModule.java:149)
at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:722)
at java.lang.Thread.run(Unknown Source)
Caused by: java.security.cert.CertificateException: No subject alternative names present
at sun.security.util.HostnameChecker.matchIP(Unknown Source)
at sun.security.util.HostnameChecker.match(Unknown Source)
at sun.security.ssl.X509TrustManagerImpl.checkIdentity(Unknown Source)
at sun.security.ssl.X509TrustManagerImpl.checkIdentity(Unknown Source)
at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
at sun.security.ssl.Handshaker.processLoop(Unknown Source)
at sun.security.ssl.Handshaker.process_record(Unknown Source)
at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
at org.eclipse.paho.client.mqttv3.internal.SSLNetworkModule.start(SSLNetworkModule.java:149)
at org.eclipse.paho.client.mqttv3.internal.ClientComms$ConnectBG.run(ClientComms.java:722)
at java.lang.Thread.run(Unknown Source)
How can I fix this error?
I am working with GSSAPI successfully with JAVA 5. With JAVA 6 and 7 the InitialLdapContext call fails with the following stacktrace:
>>>KRBError:
sTime is Fri Jun 14 13:40:01 CEST 2013 1371210001000
suSec is 948732
error code is 7
error Message is Server not found in Kerberos database
realm is DE.XXX.NET
sname is ldap/yyy.de.xxx.net
msgType is 30
KrbException: Server not found in Kerberos database (7)
at sun.security.krb5.KrbTgsRep.<init>(Unknown Source)
at sun.security.krb5.KrbTgsReq.getReply(Unknown Source)
at sun.security.krb5.KrbTgsReq.sendAndGetCreds(Unknown Source)
at sun.security.krb5.internal.CredentialsUtil.serviceCreds(Unknown Source)
at sun.security.krb5.internal.CredentialsUtil.acquireServiceCreds(Unknown Source)
at sun.security.krb5.Credentials.acquireServiceCreds(Unknown Source)
at sun.security.jgss.krb5.Krb5Context.initSecContext(Unknown Source)
at sun.security.jgss.GSSContextImpl.initSecContext(Unknown Source)
at sun.security.jgss.GSSContextImpl.initSecContext(Unknown Source)
at com.sun.security.sasl.gsskerb.GssKrb5Client.evaluateChallenge(Unknown Source)
at com.sun.jndi.ldap.sasl.LdapSasl.saslBind(Unknown Source)
at com.sun.jndi.ldap.LdapClient.authenticate(Unknown Source)
at com.sun.jndi.ldap.LdapCtx.connect(Unknown Source)
at com.sun.jndi.ldap.LdapCtx.<init>(Unknown Source)
at com.sun.jndi.ldap.LdapCtxFactory.getUsingURL(Unknown Source)
at com.sun.jndi.ldap.LdapCtxFactory.getUsingURLs(Unknown Source)
at com.sun.jndi.ldap.LdapCtxFactory.getLdapCtxInstance(Unknown Source)
at com.sun.jndi.ldap.LdapCtxFactory.getInitialContext(Unknown Source)
at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.init(Unknown Source)
at javax.naming.ldap.InitialLdapContext.<init>(Unknown Source)
at kerberos.UserRoles2.getUserRoles(UserRoles2.java:27)
at kerberos.Server$2.run(Server.java:240)
at kerberos.Server$2.run(Server.java:1)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Unknown Source)
at kerberos.Server.getRoles(Server.java:233)
at kerberos.Server.main(Server.java:95)
Caused by: KrbException: Identifier doesn't match expected value (906)
at sun.security.krb5.internal.KDCRep.init(Unknown Source)
at sun.security.krb5.internal.TGSRep.init(Unknown Source)
at sun.security.krb5.internal.TGSRep.<init>(Unknown Source)
... 29 more
Problem searching directory: javax.naming.AuthenticationException: GSSAPI [Root exception is javax.security.sasl.SaslException: GSS initiate failed [Caused by GSSException: No valid credentials provided (Mechanism level: Server not found in Kerberos database (7))]]
Does anybody has an idea what ist going wrong in Java 6 or 7?
The ktab file is created with the ktab tool of a jre 7.
"c:\Program Files\Java\jre7\bin\ktab.exe" -a user#DOMAIN.DE password -k my.keytab -n 0
"c:\Program Files\Java\jre7\bin\ktab.exe" -a Service/host#DOMAIN.DE password -k my.keytab -n 0
Windows server 2008 Active directory
Please remember: If I am using Java 5 the InitialLdapContext call is working as expected.
Thanks in advance
Michael
Problem is solved.
I have used an alias dns name for the ldap_url property. In Java 1.5 the alias dns name was resolved to the real dns name. In Java 1.6 and 1.7 the resolving does not happen.
The change to a real dns name solved the problem.
I am using netty 3 in applet and when I start it from a browser it gives me following stacktrace in Java Console, if I run from Eclipse Applet Viewer then this issue does not happen:
network: Cache entry not found [url: http://<IP address>/crossdomain.xml, version: null]
network: Connecting http://<IP address>/crossdomain.xml with proxy=DIRECT
network: Connecting http://<IP address>:80/ with proxy=DIRECT
java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.<init>(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.http.HttpClient.New(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
at com.sun.deploy.net.CrossDomainXML$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.net.CrossDomainXML.privilegedConnect(Unknown Source)
at com.sun.deploy.net.CrossDomainXML.check(Unknown Source)
at com.sun.deploy.net.CrossDomainXML.check(Unknown Source)
at sun.plugin2.applet.SecurityManagerHelper.checkConnectHelper(Unknown Source)
at sun.plugin2.applet.AWTAppletSecurityManager.checkConnect(Unknown Source)
at sun.nio.ch.SocketChannelImpl.connect(Unknown Source)
at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink.connect(NioClientSocketPipelineSink.java:150)
at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink.eventSunk(NioClientSocketPipelineSink.java:113)
at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendDownstream(DefaultChannelPipeline.java:771)
at org.jboss.netty.handler.codec.oneone.OneToOneEncoder.handleDownstream(OneToOneEncoder.java:60)
at org.jboss.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:591)
at org.jboss.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:582)
at org.jboss.netty.channel.Channels.connect(Channels.java:541)
at org.jboss.netty.channel.AbstractChannel.connect(AbstractChannel.java:210)
at org.jboss.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:227)
at org.jboss.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:188)
at org.mypackage.Myclass.connect(Client.java:80)
And also this
Exception caught: [id: 0x00498342] EXCEPTION: java.security.AccessControlException: access denied ("java.net.SocketPermission" "<IP address>:18090" "connect,resolve")
Exception caught: [id: 0x00498342] EXCEPTION: java.nio.channels.ClosedChannelException
I test at local PC but specify its IP address to connect.
This is line 80 in my connect method:
future = bootstrap.connect(new InetSocketAddress(host, port));
I have tried to surround it with no success
AccessController.doPrivileged(
new PrivilegedAction<Void>() {
public Void run () {
MyClass.connect(type, userId, secondValue);
return null;
}
}
);
Please, advice how can I solve it?
I was able to solve the problem.
First, I have tried to connect to 127.0.0.1, but for that I had to install Jetty and put my applet and hmtl inside jetty. So it started to work for localhost only.
Socket connection to originating server of an unsigned Java applet
It still didn't work for 10.x.y.z, so I had to sign applet
Is it possible to sign a java applet for free?
and also to create crossdomain.xml in jetty like here:
access denied (java.net.SocketPermission 127.0.0.1:8080 connect,resolve)
When I test an RMI client and server with the class files it works without any issue on two different machines. Now when I do the same thing with a jar the client fails to connect to the RMIRegistry on the server. Then when I test with the jar on the same machine, the client can connect to the server (even over the network ip and not localhost).
I suspect this has something to do with the RMI registry, but i'm a total novice at RMI, so I have no clue...
I create an RMIRegistry like so:
rmiregistry = LocateRegistry.createRegistry(ServiceConstraints.REGISTRY_PORT);
rmiService = (RmiSubjectService) UnicastRemoteObject.exportObject(this,
ServiceConstraints.REGISTRY_PORT);
rmiregistry.rebind("RmiService", rmiService);
The client connects like this:
remoteService = (RmiSubjectService) Naming.lookup("/" + host + ":"+ port + "/RmiService");
The error I get on the client when running with a jar:
java.rmi.ConnectException: Connection refused to host: 192.168.2.132; nested exception is:
java.net.ConnectException: Connection timed out: connect
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(Unknown Source)
at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)
at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)
at sun.rmi.server.UnicastRef.newCall(Unknown Source)
at sun.rmi.registry.RegistryImpl_Stub.lookup(Unknown Source)
at java.rmi.Naming.lookup(Unknown Source)
at ch.uzh.ifi.group10.client.Client.subscribe(Client.java:148)
at ch.uzh.ifi.group10.client.Client.main(Client.java:242)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoa
der.java:58)
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(Unknown Source)
at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(Unknown S
ource)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(Unknown S
ource)
... 13 more
The problem did turn out to be the network. Specifically it was that I didn't realize that my firewall was blocking the socket, so I could not connect.
I am using LinkedIn-j api for making a Linkedin application.The problem that I am facing is that I want to develop a simple desktop application. Rather I must say a console application. The problem comes where I get this error
Exception in thread "main" com.google.code.linkedinapi.client.oauth.LinkedInOAuthServiceException: oauth.signpost.exception.OAuthCommunicationException: Communication with the service provider failed: api.linkedin.com
at com.google.code.linkedinapi.client.oauth.LinkedInOAuthServiceImpl.getOAuthRequestToken(LinkedInOAuthServiceImpl.java:159)
at com.lineedapp.common.LinkedinApp.main(LinkedinApp.java:17)
Caused by: oauth.signpost.exception.OAuthCommunicationException: Communication with the service provider failed: api.linkedin.com
at oauth.signpost.AbstractOAuthProvider.retrieveToken(AbstractOAuthProvider.java:214)
at oauth.signpost.AbstractOAuthProvider.retrieveRequestToken(AbstractOAuthProvider.java:69)
at com.google.code.linkedinapi.client.oauth.LinkedInOAuthServiceImpl.getOAuthRequestToken(LinkedInOAuthServiceImpl.java:148)
... 1 more
Caused by: java.net.UnknownHostException: api.linkedin.com
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at com.sun.net.ssl.internal.ssl.SSLSocketImpl.connect(Unknown Source)
at com.sun.net.ssl.internal.ssl.BaseSSLSocketImpl.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.<init>(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.New(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.connect(Unknown Source)
at oauth.signpost.basic.DefaultOAuthProvider.sendRequest(DefaultOAuthProvider.java:48)
at oauth.signpost.AbstractOAuthProvider.retrieveToken(AbstractOAuthProvider.java:177)
... 3 more
I suppose I am not able to provide a host in the application registration form. I did Provide Local host but its not working. Please Help??
Caused by: java.net.UnknownHostException: api.linkedin.com
It looks like you don't have network access to api.linkedin.com. Make sure that, if you are behind a proxy or not, you have access to https://api.linkedin.com.
The java.net.UnknownHostException: api.linkedin.com means that you are not able to reach the server.
Check that your are not behind a proxy. If so, you have to find a way to bypass this proxy in the linkedin API.