Not able to use External Jar file for DB connection

[murari.msn]

HI,

Can anyone help me in solving the issue faced while developing the application using Postgres DB with SmartGWT-2.0 and GWT 2.0, failing to establish the connection.

[Isomorphic]

Post the error you are seeing and the configuration you're using.

[murari.msn]

Configuration Details

Eclipse 3.4 (Ganymede)
Gwt plugin
Appengine 1.3
GWT 2.0
SmartGwt 2.0
Postgres Sql DB

I initially tried setting external library path for the 'postgresql-8.4-701.jdbc4.jar' and tried running the server got this error attached below.

Initializing AppEngine server
The server is running at http://localhost:8888/
java.lang.ClassNotFoundException: org.postgresql.Driver
	at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)

I tried putting the same jar file inside the war/WEB-INF/lib and restarted the server, and error log reads below

Initializing AppEngine server
The server is running at http://localhost:8888/
9 Feb, 2010 7:00:26 AM com.google.appengine.tools.development.ApiProxyLocalImpl log
SEVERE: [1265698826728000] javax.servlet.ServletContext log: Exception while dispatching incoming RPC call
com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract java.lang.String com.zo.zotweb.client.GreetingService.greetServer(java.lang.String)' threw an unexpected exception: java.lang.NoClassDefFoundError: java.net.Socket is a restricted class. Please see the Google  App Engine developer's guide for more details.
	at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:378)
	at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:581)
	at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:188)
	at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:224)
	at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
	at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093)
	at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:51)
	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
	at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
	at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:121)
	at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
	at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
	at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
	at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
	at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
	at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
	at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:352)
	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
	at org.mortbay.jetty.Server.handle(Server.java:313)
	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506)
	at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:844)
	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:644)
	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:396)
	at org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
Caused by: java.lang.NoClassDefFoundError: java.net.Socket is a restricted class. Please see the Google  App Engine developer's guide for more details.
	at com.google.appengine.tools.development.agent.runtime.Runtime.reject(Runtime.java:51)
	at org.postgresql.core.PGStream.<init>(PGStream.java:62)
	at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:76)
	at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:66)
	at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:125)
	at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:30)
	at org.postgresql.jdbc3g.AbstractJdbc3gConnection.<init>(AbstractJdbc3gConnection.java:22)
	at org.postgresql.jdbc4.AbstractJdbc4Connection.<init>(AbstractJdbc4Connection.java:30)
	at org.postgresql.jdbc4.Jdbc4Connection.<init>(Jdbc4Connection.java:24)
	at org.postgresql.Driver.makeConnection(Driver.java:393)
	at org.postgresql.Driver.connect(Driver.java:267)
	at java.sql.DriverManager.getConnection(DriverManager.java:582)
	at java.sql.DriverManager.getConnection(DriverManager.java:185)
	at com.zo.zotweb.server.DbConnection.connectDB(DbConnection.java:12)
	at com.zo.zotweb.server.GreetingServiceImpl.greetServer(GreetingServiceImpl.java:19)
	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:597)
	at com.google.appengine.tools.development.agent.runtime.Runtime.invoke(Runtime.java:100)
	at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:562)
	... 30 more

please help me find the solution for this

[sjivan]

The error message you're seeing is unrelated to SmartGWT. Use the GWT google forums, or google search.

Sanjiv