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ramakrishna rayudu

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Recent posts by ramakrishna rayudu

Hi..

This is Ramky.can any one please help regrading my Question in my project we have Server called GTM-GatewayServer this was Developed using
Java Nio API we have so many Clients all Clients Apps Will connect to this server and they can send SMS to Mobile Users.
here is MyQuestion that if any Client connected to This NioServer we are storing the Socket Channel with Clinet ID in HashMap.
After a long time when the Server wants to send some data to the Client server will get the SocketChannel Obejct from HashMap
and it will try to Write Data on the Scoket Channel But its giving that Socket is Closed.is there any time out for Scoket or Scoket Channle?? (or)
will Scoket or Scoket Channel will Automatically Closed if i put Scoket Channel or Scoket Ideal for Long time???

Thanks in Advance,
Ramky
Hi...

you should not use the Filter for the Printing purpose.Filter must be used for Session checking and scanning the the incoming the HttpRequest
in very high security websites.
coming to your Question
when your Filter is fired with URL pattren Automaticlly Server will call the doFilter() Method with Required Arguments
Request and Response chain.
you need to some sort of validations after completion successful the request should go to the Original Resource. like this chain.doFilter(request,response);
if not we will redirct to another page in the doFilter Method only.
response.sendRedrict("error.jsp"); like this..

i hope i gave you the answer if not please rise the Query..

Thanks,
Ramakrishna Rayudu
7 years ago
hi...

when i was interview Project Lead Asked me why wait() and notify() methods are in Object class rather then in the Thread Class??
could you please tell me is there any thing triky there??

Thanks,
Ramky
7 years ago
hi..

i have a small doubt in my mind that why notify() , wait() and notifyall() methods are in Object class i think all these methods are related to the Threads right??
they should be some reason for that can you tell me wat is that reason??

Thanks,
Ramky
Hi..

we are using JBoss server in out project.JBOSS server will run in the one system and we have appication called NIO-SREVER it will listen Queue in another JBOSS.
its working fine up to some days.After that our systems are hacked by some one so we closed some of the ports on the server where JBOSS is Running.
now i am not able to Listen The Queue in JBOSS Server.i am getting the Connection TimeOut Exception.its not possible to open all the ports.
can you please tell me what are the ports that i need to open to listen the remote jboss Queue.


this is very urget to can you please give any solution??

Thanks,
Ramky
Hi..

we are using JBoss server in out project.JBOSS server will run in the one system and we have appication called NIO-SREVER it will listen Queue in another JBOSS.
its working fine up to some days.After that our systems are hacked by some one so we closed some of the ports on the server where JBOSS is Running.
now i am not able to Listen The Queue in JBOSS Server.i am getting the Connection TimeOut Exception.its not possible to open all the ports.
can you please tell me what are the ports that i need to open to listen the remote jboss Queue.


this is very urget to can you please give any solution??

Thanks,
Ramky
Hi..

we are using JBoss server in out project.JBOSS server will run in the one system and we have appication called NIO-SREVER it will listen Queue in another JBOSS.
its working fine up to some days.After that our systems are hacked by some one so we closed some of the ports on the server where JBOSS is Running.
now i am not able to Listen The Queue in JBOSS Server.i am getting the Connection TimeOut Exception.its not possible to open all the ports.
can you please tell me what are the ports that i need to open to listen the remote jboss Queue.


this is very urget to can you please give any solution??

Thanks,
Ramky
7 years ago
Hi..

we are using JBoss server in out project. JBOSS server will run in the one system and we have appication called NIO-SREVER it will listen Queue in another JBOSS.
its working fine up to some days.After that our systems are hacked by some one so we closed some of the ports on the server where JBOSS is Running.
now i am not able to Listen The Queue in JBOSS Server.i am getting the Connection TimeOut Exception.its not possible to open all the ports.
can you please tell me what are the ports that i need to open to listen the remote jboss Queue.

can you please give any solution??

Thanks,
Ramky

7 years ago
Hi..

we have an Application in that we are using NIoserver for Incoming Requests from then i am listening the remote JBOSS JMS-Topic.its working fine
up to now.but it not working now.one thing we done is we changed the systems.
here my Question is what are the Ports that i should have permission for Lookup.
when i am doing lookup it not giving any error or Exception.simply the program is in Stop (Blocked). i don't know why this will happen??
can you give me any solution about this?

after a long time i got this Exception........

javax.naming.CommunicationException [Root exception is java.rmi.ConnectException: Connection refused to host: ip-10-250-50-192.ec2.internal; nested exception is:
java.net.ConnectException: Connection timed out]
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:724)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:589)
at javax.naming.InitialContext.lookup(InitialContext.java:351)
at com.gtm.serverpush.chat.Util.doesDestinationExist(Util.java:65)
at com.gtm.serverpush.chat.TopicConnector.setup(TopicConnector.java:180)
at com.gtm.serverpush.chat.TopicConnector.<init>(TopicConnector.java:75)
at com.gtm.serverpush.chat.ServerTopic.<init>(ServerTopic.java:48)
at com.gtm.serverpush.chat.NioServer.main(NioServer.java:434)
Caused by: java.rmi.ConnectException: Connection refused to host: ip-10-250-50-192.ec2.internal; nested exception is:
java.net.ConnectException: Connection timed out
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:574)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:185)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:171)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:94)
at org.jnp.server.NamingServer_Stub.lookup(Unknown Source)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:627)
... 7 more
Caused by: java.net.ConnectException: Connection timed out
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:367)
at java.net.Socket.connect(Socket.java:524)
at java.net.Socket.connect(Socket.java:474)
at java.net.Socket.<init>(Socket.java:371)
at java.net.Socket.<init>(Socket.java:184)
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:569)
... 12 more
in the setup() Method-180--in IF
javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:645)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:247)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(InitialContext.java:284)
at javax.naming.InitialContext.lookup(InitialContext.java:351)
at com.gtm.serverpush.chat.Util.lookupMBeanServerProxy(Util.java:114)
at com.gtm.serverpush.chat.Util.deployQueue(Util.java:83)
at com.gtm.serverpush.chat.TopicConnector.setup(TopicConnector.java:184)
at com.gtm.serverpush.chat.TopicConnector.<init>(TopicConnector.java:75)
at com.gtm.serverpush.chat.ServerTopic.<init>(ServerTopic.java:48)
at com.gtm.serverpush.chat.NioServer.main(NioServer.java:434

thanks
Ramky,
Hi thanks for your replay,,

i am getting this problem when i am updating the table with large data.
i should do this but i am getting this error.is there any way to do this with out having any problem with the connection failures??
manes in our project web layer in struts--EJB--JDBC --MySql Database. i am calling a procedure which is taking very long time..
but i need to do that..when i am calling this my DAo classes i am getting this Exception...

can you please tell me how to solve this problem???

Thanks
Ramky..

hi i have a big problem with database.
can any one please tell me the solution..
this is the exception i am getting when i am updating the data in the table...


07:22:11,194 INFO [DefaultListDAO] updateGroupListDataCount
07:22:11,238 WARN [TxConnectionManager] Connection error occured: org.jboss.resource.connectionmanager.TxConnectionManager$TxConnectionEventListener@1d900445[state=NORMAL mc=org.jboss.resource.adapter.jdbc.xa.XAManagedConnection@4a84336b handles=1 lastUse=1302866530562 permit=true trackByTx=true mcp=org.jboss.resource.connectionmanager.JBossManagedConnectionPool$OnePool@2d4bdc05 context=org.jboss.resource.connectionmanager.InternalManagedConnectionPool@4f59e37e xaResource=org.jboss.resource.connectionmanager.xa.JcaXAResourceWrapper@5a085d2c txSync=null]
com.mysql.jdbc.CommunicationsException: Communications link failure

Last packet sent to the server was 29 ms ago.
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1070)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2985)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2871)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3414)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1936)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2060)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2542)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1734)
at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:995)
at com.mysql.jdbc.CallableStatement.execute(CallableStatement.java:859)
at com.mysql.jdbc.jdbc2.optional.PreparedStatementWrapper.execute(PreparedStatementWrapper.java:821)
at com.mysql.jdbc.CallableStatement.execute(CallableStatement.java:859)
at com.mysql.jdbc.jdbc2.optional.PreparedStatementWrapper.execute(PreparedStatementWrapper.java:821)
at org.jboss.resource.adapter.jdbc.WrappedPreparedStatement.execute(WrappedPreparedStatement.java:209)
at com.gtm.cm2.dbutils.DBUtils.execute(DBUtils.java:476)
at com.gtm.cm2.dao.DefaultListDAO.updateGroupListDataCount(DefaultListDAO.java:3713)
at com.gtm.cm2.lists.ListManagerBean.createGroups(ListManagerBean.java:686)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:592)
at org.jboss.invocation.Invocation.performCall(Invocation.java:359)
at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionContainer.java:237)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:158)
at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstanceInterceptor.java:169)
at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:63)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:121)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:350)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:181)
at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:168)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:205)
at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:138)
at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:648)
at org.jboss.ejb.Container.invoke(Container.java:960)
at org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFactory.java:430)
at org.jboss.ejb.plugins.local.StatelessSessionProxy.invoke(StatelessSessionProxy.java:103)
at $Proxy140.createGroups(Unknown Source)
at com.gtm.cm2.services.delegate.ListManagerDelegate.createGroups(ListManagerDelegate.java:351)
at com.gtm.cm2.actions.ListAction.createGroup(ListAction.java:1936)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:592)
at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:266)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:167)
at com.gtm.cm2.common.BaseAction.execute(BaseAction.java:84)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:413)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:225)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1858)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:459)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.service.session.ClusteredSessionValve.invoke(ClusteredSessionValve.java:87)
at org.jboss.web.tomcat.service.session.JvmRouteValve.invoke(JvmRouteValve.java:84)
at org.jboss.web.tomcat.service.session.ClusteredSessionValve.invoke(ClusteredSessionValve.java:87)
at org.jboss.web.tomcat.service.session.JvmRouteValve.invoke(JvmRouteValve.java:84)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2431)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2882)
... 68 more
07:22:11,263 ERROR [XAManagedConnectionFactory] End transaction failed for XAResource
com.mysql.jdbc.jdbc2.optional.MysqlXAException: No operations allowed after connection closed.Connection was implicitly closed due to underlying exception/error:


** BEGIN NESTED EXCEPTION **

com.mysql.jdbc.CommunicationsException
MESSAGE: Communications link failure

Last packet sent to the server was 29 ms ago.

STACKTRACE:

com.mysql.jdbc.CommunicationsException: Communications link failure

Last packet sent to the server was 29 ms ago.
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1070)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2985)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2871)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3414)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1936)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2060)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2542)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1734)
at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:995)
at com.mysql.jdbc.CallableStatement.execute(CallableStatement.java:859)
at com.mysql.jdbc.jdbc2.optional.PreparedStatementWrapper.execute(PreparedStatementWrapper.java:821)
at org.jboss.resource.adapter.jdbc.WrappedPreparedStatement.execute(WrappedPreparedStatement.java:209)
at com.gtm.cm2.dbutils.DBUtils.execute(DBUtils.java:476)
at com.gtm.cm2.dao.DefaultListDAO.updateGroupListDataCount(DefaultListDAO.java:3713)
at com.gtm.cm2.lists.ListManagerBean.createGroups(ListManagerBean.java:686)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:592)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:592)
at org.jboss.invocation.Invocation.performCall(Invocation.java:359)
at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionContainer.java:237)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:158)
at org.jboss.ejb.plugins.StatelessSessionInstanceInterceptor.invoke(StatelessSessionInstanceInterceptor.java:169)
at org.jboss.ejb.plugins.CallValidationInterceptor.invoke(CallValidationInterceptor.java:63)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:121)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:350)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:181)
at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:168)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:205)
at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:138)
at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:648)
at org.jboss.ejb.Container.invoke(Container.java:960)
at org.jboss.ejb.plugins.local.BaseLocalProxyFactory.invoke(BaseLocalProxyFactory.java:430)
at org.jboss.ejb.plugins.local.StatelessSessionProxy.invoke(StatelessSessionProxy.java:103)
at $Proxy140.createGroups(Unknown Source)
at com.gtm.cm2.services.delegate.ListManagerDelegate.createGroups(ListManagerDelegate.java:351)
at com.gtm.cm2.actions.ListAction.createGroup(ListAction.java:1936)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:592)
at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:266)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:167)
at com.gtm.cm2.common.BaseAction.execute(BaseAction.java:84)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:413)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:225)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1858)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:459)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.service.session.ClusteredSessionValve.invoke(ClusteredSessionValve.java:87)
at org.jboss.web.tomcat.service.session.JvmRouteValve.invoke(JvmRouteValve.java:84)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.
at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2431)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2882)
... 68 more


** END NESTED EXCEPTION **


at com.mysql.jdbc.jdbc2.optional.MysqlXAConnection.mapXAExceptionFromSQLException(MysqlXAConnection.java:606)
at com.mysql.jdbc.jdbc2.optional.MysqlXAConnection.dispatchCommand(MysqlXAConnection.java:585)
at com.mysql.jdbc.jdbc2.optional.MysqlXAConnection.end(MysqlXAConnection.java:480)
at org.jboss.resource.adapter.jdbc.xa.XAManagedConnection.end(XAManagedConnection.java:147)
at org.jboss.resource.connectionmanager.xa.JcaXAResourceWrapper.end(JcaXAResourceWrapper.java:58)
at com.arjuna.ats.internal.jta.resources.arjunacore.XAResourceRecord.topLevelAbort(XAResourceRecord.java:372)
at com.arjuna.ats.arjuna.coordinator.BasicAction.doAbort(BasicAction.java:3222)
at com.arjuna.ats.arjuna.coordinator.BasicAction.doAbort(BasicAction.java:3200)
at com.arjuna.ats.arjuna.coordinator.BasicAction.Abort(BasicAction.java:1928)
at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.cancel(TwoPhaseCoordinator.java:105)
at com.arjuna.ats.arjuna.AtomicAction.cancel(AtomicAction.java:230)
at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.rollback(TransactionImple.java:328)
at org.jboss.ejb.plugins.TxInterceptorCMT.endTransaction(TxInterceptorCMT.java:493)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:361)
at org.jboss.ejb.plugins.TxInterceptorCMT.invoke(TxInterceptorCMT.java:181)
at org.jboss.ejb.plugins.SecurityInterceptor.invoke(SecurityInterceptor.java:168)
at org.jboss.ejb.plugins.LogInterceptor.invoke(LogInterceptor.java:205)
at org.jboss.ejb.plugins.ProxyFactoryFinderInterceptor.invoke(ProxyFactoryFinderInterceptor.java:138)
at org.jboss.ejb.SessionContainer.internalInvoke(SessionContainer.java:2011-04-15 07:22:11,263 ERROR [org.jboss.resource.adapter.jdbc.xa.XAManagedConnectionFactory] End transaction failed for XAResource
com.mysql.jdbc.jdbc2.optional.MysqlXAException: No operations allowed after connection closed.Connection was implicitly closed due to underlying exception/error:


** BEGIN NESTED EXCEPTION **

com.mysql.jdbc.CommunicationsException
MESSAGE: Communications link failure

Last packet sent to the server was 29 ms ago.

STACKTRACE:

com.mysql.jdbc.CommunicationsException: Communications link failure

Last packet sent to the server was 29 ms ago.
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1070)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2985)
at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2871)





can i any please help me to solve this problem..


thanks,
Ramky



hi..

in my Project i need to upload the Image in to Server.how can do with the Servlet for Uploading Image.
here client is Flex Applcation it will send image in the form of Byte Array.i need to get the Byte Stream from that request..

can you tell me how to access this??
thanks,
Ramakrishna Rayudu.
7 years ago
Hi,,

see this link i think there is wrong in your ContextLookup Only..
http://tomcat.apache.org/tomcat-4.1-doc/jndi-datasource-examples-howto.html

http://www.coderanch.com/t/442367/Tomcat/Name-jdbc-not-bound-Context
yes..this is what i want.
if it is http request for every request there is response means until you send request you dont get any response.
so
1)one thing all ways you need to poll the server for getting the incoming messages..
2)second thing (good one) possible with Flash/Flex i think second is very good option.(****Servlet will not work in this role******)

this is the problem we had in lost 10 months in one our project called [u]http://www.cherple.com/widget.asp
see this onces. this is two way chat application pc-cellphone when the mobile
user replays any message then Automatically it will come to the Client Side Flash widget (it will run in the browser).[/b]
i think i told the correct answer.
7 years ago
Pleas give me more information abt this...
if you want use servlet for this purpose the client should all ways send http request only and in your client implementation may be browser or any other app.
if you are writing any Socket Programe then Http Client will not work(Browser) then allways it should be the Clent App.(Socket Client)
and an other good Option is if you want this in browser in Flex/Flash can this purpose with Socket Server.
7 years ago