Long story short, I have an RMI Server and Client. The Server and Client are capable of making RMI calls on each other. After the Client connects to the Server, the Server may make many hundreds of method calls in quick succession on the Client.
The problem is this - towards the end of a huge batch of Server-to-Client method calls, some will fail because RMI claims it cannot establish a connection from Server-to-Client, even though hundreds of calls before it will succeed. I can't post any real code because this project is rather large (about 50k lines), but here's the full stack trace of the exception that gets thrown:
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is:
java.net.SocketException: Connection reset
at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknown Source)
at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
at sun.rmi.server.UnicastRef.invoke(Unknown Source)
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(Unknown Source)
at java.rmi.server.RemoteObjectInvocationHandler.invoke(Unknown Source)
at $Proxy0.findClassDefinition(Unknown Source)
at com.fabric.network.NetworkClassLoader.findClass(NetworkClassLoader.java:111)
at java.lang.ClassLoader.loadClass(Unknown Source)
at com.fabric.network.NetworkClassLoader.loadClass(NetworkClassLoader.java:131)
at java.lang.ClassLoader.loadClass(Unknown Source)
at com.fabric.network.MessageSocket$CustomObjectInputStream.resolveClass(MessageSocket.java:171)
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at com.fabric.network.MessageSocket.receive(MessageSocket.java:118)
at com.fabric.application.driver.NodeRemoteDriver$IncomingMessageThread.run(NodeRemoteDriver.java:205)
Caused by: java.rmi.ConnectIOException: error during JRMP connection establishment; nested exception is:
java.net.SocketException: Connection reset
at sun.rmi.transport.tcp.TCPChannel.createConnection(Unknown Source)
at sun.rmi.transport.tcp.TCPChannel.newConnection(Unknown Source)
at sun.rmi.server.UnicastRef.invoke(Unknown Source)
at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(Unknown Source)
at java.rmi.server.RemoteObjectInvocationHandler.invoke(Unknown Source)
at $Proxy2.findClassDefinition(Unknown Source)
at com.fabric.network.ClassDefinitionCache.findClassDefinition(ClassDefinitionCache.java:78)
at com.fabric.management.host.NodeManagementServices.findClassDefinition(NodeManagementServices.java:231)
at sun.reflect.GeneratedMethodAccessor16.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(Unknown Source)
at java.io.BufferedInputStream.fill(Unknown Source)
at java.io.BufferedInputStream.read(Unknown Source)
at java.io.DataInputStream.readByte(Unknown Source)
... 21 more
Again, sorry I can't provide much in the way of code, but I'm not necessarily asking for a code fix - I just want to wrap my head around why this might be happening.
EDIT
Added the full stack trace.
Ok, so after nearly pulling all my hair out, it turns out that RMI was trying to open up way too many ports. I am using a custom RMISocketFactory implementation under the hood. This custom implementation is a singleton, so I didn't think it was necessary to implement hashCode() and equals(). A very painful mistake indeed...
Turns out, RMI won't reuse sockets if RMI determines that the socket it needs to create is to be created by an RMISocketFactory that isn't equivalent to the factory that created the socket it wants to reuse. RMI relies on equals() and hashCode() to perform this check. Once I correctly implemented these two methods in my custom socket factory, these intermittent problems went away.
The description of this issue can be found here:
http://docs.oracle.com/javase/7/docs/technotes/guides/rmi/faq.html
At any rate, thanks to all for taking a look at this, I sure appreciate your time!
Additional Information
A secondary issue that I didn't notice before was that the ServerSocket I was using was running out of queue space for incoming connection requests, which also contributed to the connections being dropped. Using the constructor new ServerSocket(port, newConnectionQueueSize, bindAddress) with a larger newConnectionQueueSize contributed to solving this problem as well.
Related
Okay, this is weird. I have a regular java console application. It uses spring and hibernate and works as expected when is do Run As... from inside eclipse. When I package a runnable JAR with all the dependencies and export that, it fails while initializing the spring context with the below exception.
I strongly suspect that the difference is that because I work for the government, our security folks must have an exception that allows eclipse to go to the internet and get the xsd, while the jvm outside eclipse does not. I confirmed this using curl...it cannot get the xsd, being rejected by the firewall.
There's no chance I'm going to get a firewall exception as it's very bureaucratic and they are inclined to say 'no' unless you have a really compelling reason. I found an article talking about putting the xsd's local in meta-inf, but that seems aimed as web projects. Mine is a console app. I'm not sure how to do something similar in the console project.
I tried just creating a meta-inf directory off the root and adding it to the classpath, but that didn't work. So how can i get spring to consume local copies of the xsd files in a console application?
WARNING: Ignored XML validation warning
org.xml.sax.SAXParseException; lineNumber: 22; columnNumber: 115; schema_reference.4: Failed to read schema document 'http://www.springframework.org/schema/beans/spring-beans-3.0.xsd', because 1) could not find the document; 2) the document could not be read; 3) the root element of the document is not <xsd:schema>.
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.warning(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.reportSchemaErr(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.reportSchemaWarning(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.getSchemaDocument1(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.getSchemaDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.parseSchema(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaLoader.loadSchema(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.findSchemaGrammar(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.startElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(Unknown Source)
at org.springframework.beans.factory.xml.DefaultDocumentLoader.loadDocument(DefaultDocumentLoader.java:77)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadDocument(XmlBeanDefinitionReader.java:428)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:390)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:335)
at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:303)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:187)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:223)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:194)
at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:258)
at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:128)
at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:94)
at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:133)
at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:621)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:522)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:144)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:85)
at gov.usdoj.afms.umc.cli.DoUmc.initializeSpring(DoUmc.java:191)
at gov.usdoj.afms.umc.cli.DoUmc.<init>(DoUmc.java:102)
at gov.usdoj.afms.umc.cli.DoUmc.main(DoUmc.java:77)
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.connect0(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 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.plainConnect0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineDocVersion(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.xs.opti.SchemaParsingConfig.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.xs.opti.SchemaParsingConfig.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.xs.opti.SchemaDOMParser.parse(Unknown Source)
... 37 more
This question already has answers here:
Java Serialization Exception Message
(3 answers)
Closed 5 years ago.
i got following exception in tomcat 6, after deployed war file. but its happens sometimes only. its affect anything in application ? do i need to anything for that. also please let me why its happening in my tomcat?
thanks in advance.
va.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: com.sun.faces.context.ExternalCon
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
used by: java.io.NotSerializableException: com.sun.faces.context.ExternalContextImpl
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1551)
at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:994)
at org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:523)
at org.apache.catalina.session.StandardManager.unload(StandardManager.java:469)
at org.apache.catalina.session.StandardManager.stop(StandardManager.java:673)
at org.apache.catalina.core.StandardContext.stop(StandardContext.java:4774)
at org.apache.catalina.core.ContainerBase.removeChild(ContainerBase.java:924)
at org.apache.catalina.startup.HostConfig.undeployApps(HostConfig.java:1319)
at org.apache.catalina.startup.HostConfig.stop(HostConfig.java:1290)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:323)
... 6 more
g 31, 2017 12:30:49 PM org.apache.catalina.session.StandardManager start
VERE: Exception loading sessions from persistent storage
va.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: com.sun.faces.context.ExternalCon
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
at java.io.ObjectInputStream.readSerialData(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1475)
at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:977)
at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:394)
at org.apache.catalina.session.StandardManager.load(StandardManager.java:321)
at org.apache.catalina.session.StandardManager.start(StandardManager.java:643)
at org.apache.catalina.core.ContainerBase.setManager(ContainerBase.java:438)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4559)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:7
From the stacktrace it looks like one of your applications stores an object in the session that cannot be persisted (serialized) through server-restarts.
You can either configure Tomcat to not persist sessions at all (or try the alternative persistence mechanism documented there) or find the application that is storing the questionable data in the session and fix it (recommended).
I have a listener class with a TableViewer and calls remove(Object) to remove rows in a table. Code is using Display.getDefault().syncExec but still seems there is some synchronization issue. Also this does not happen all the time and for some reason only happens in Windows 7 and not in Windows XP. We tried to put a check on the TableViewer.getTable().isDisposed() before removing the Object and still we are getting the "Widget is disposed" error.
Does anyone have any ideas how to prevent this? We are using jface-3.2.0. Any help is much appreciated.
org.eclipse.swt.SWTException: Failed to execute runnable (org.eclipse.swt.SWTException: Widget is disposed)
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Unknown Source)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Unknown Source)
at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:822)
at org.eclipse.jface.window.Window.open(Window.java:798)
at com.sdm.hw.client.swt.HwMain.main(HwMain.java:132)
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 com.sun.javaws.Launcher.executeApplication(Unknown Source)
at com.sun.javaws.Launcher.executeMainClass(Unknown Source)
at com.sun.javaws.Launcher.doLaunchApp(Unknown Source)
at com.sun.javaws.Launcher.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.eclipse.swt.SWTException: Widget is disposed
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.widgets.Widget.error(Unknown Source)
at org.eclipse.swt.widgets.Widget.checkWidget(Unknown Source)
at org.eclipse.swt.widgets.Widget.getData(Unknown Source)
at org.eclipse.jface.viewers.TableViewer.doFindItem(TableViewer.java:404)
at org.eclipse.jface.viewers.StructuredViewer.findItems(StructuredViewer.java:776)
at org.eclipse.jface.viewers.StructuredViewer.findItem(StructuredViewer.java:731)
at org.eclipse.jface.viewers.TableViewer.setSelectionToWidget(TableViewer.java:1138)
at org.eclipse.jface.viewers.StructuredViewer.setSelectionToWidget(StructuredViewer.java:1619)
at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1330)
at org.eclipse.jface.viewers.TableViewer.remove(TableViewer.java:993)
I am developing a RMI Chat application in Java. I am trying to run simple RMI application in eclipse IDE. But it issues following problem. I know how to run it from command prompt and its running without any problem. If you could suggest me the ways to run RMI application in Eclipse IDE is really appreciated. Thank you!
Error:
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: examples.credit.CreditChecker
at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.oldDispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: examples.credit.CreditChecker
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at sun.rmi.server.LoaderHandler.loadProxyInterfaces(Unknown Source)
at sun.rmi.server.LoaderHandler.loadProxyClass(Unknown Source)
at sun.rmi.server.LoaderHandler.loadProxyClass(Unknown Source)
at java.rmi.server.RMIClassLoader$2.loadProxyClass(Unknown Source)
at java.rmi.server.RMIClassLoader.loadProxyClass(Unknown Source)
at sun.rmi.server.MarshalInputStream.resolveProxyClass(Unknown Source)
at java.io.ObjectInputStream.readProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
... 13 more
Sorry. i am not sure about that it is right or wrong. because i have not work on RMI
applications. but i am sure that following link solve your problem.
running rmi server, classnotfound
How can i convert language in my Java? Is there any API exist, which convert any language to any other language? I am using Google Translate API, but it giving me below exception.
java.lang.Exception: [google-api-translate-java] Error retrieving translation.
at com.google.api.GoogleAPI.retrieveJSON(GoogleAPI.java:123)
at com.google.api.translate.Translate.execute(Translate.java:69)
at com.nextenders.client.beans.ruleengine.RuleEngineTest.main(RuleEngineTest.java:27)
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 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)
null
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(Unknown Source)
at com.google.api.GoogleAPI.retrieveJSON(GoogleAPI.java:107)
... 2 more
If anybody knows any API for translation, please tell me.
As suggested by the guy on JavaRanch, there is an issue with the connection to the API
Somewhere you will have specified a URL to connect to, something is blocking that, check you can access that address via ping