How to launch gwt-project on external server, e.g. tomcat?

Question

I deployed my gwt project on localhost with gwt-plugin on eclipse. Everything works fine. But when I try to launch application outside (from tomcat) it doesn't work normally. I put war content into webaaps folder. The client side of gwt works well but there is a problem with connection to server side.

Probable error from logs:

127.0.0.1 - - [07/Mar/2014:17:31:36 +0400] "GET /BugGitGwt/ HTTP/1.1" 200 2954
127.0.0.1 - - [07/Mar/2014:17:31:36 +0400] "GET /BugGitGwt/buggitgwt/buggitgwt.nocache.js HTTP/1.1" 200 6004
127.0.0.1 - - [07/Mar/2014:17:31:36 +0400] "GET /BugGitGwt/loading4.gif HTTP/1.1" 200 2164
127.0.0.1 - - [07/Mar/2014:17:31:36 +0400] "GET /BugGitGwt/BugGitGwt.css HTTP/1.1" 200 708
127.0.0.1 - - [07/Mar/2014:17:31:36 +0400] "GET /BugGitGwt/buggitgwt/gwt/clean/clean.css HTTP/1.1" 200 29325
127.0.0.1 - - [07/Mar/2014:17:31:36 +0400] "GET /BugGitGwt/buggitgwt/0B29E478EEA6D0F7C8617BCA1D490240.cache.html HTTP/1.1" 200 161530
127.0.0.1 - - [07/Mar/2014:17:31:36 +0400] "POST /BugGitGwt/buggitgwt/greet HTTP/1.1" 500 2820
127.0.0.1 - - [07/Mar/2014:17:31:36 +0400] "POST /BugGitGwt/buggitgwt/greet HTTP/1.1" 500 2820
127.0.0.1 - - [07/Mar/2014:17:31:36 +0400] "POST /BugGitGwt/buggitgwt/greet HTTP/1.1" 500 2820
127.0.0.1 - - [07/Mar/2014:17:31:36 +0400] "GET /BugGitGwt/buggitgwt/gwt/clean/images/hborder.png HTTP/1.1" 200 1995
127.0.0.1 - - [07/Mar/2014:17:31:36 +0400] "GET /BugGitGwt/buggitgwt/gwt/clean/images/circles.png HTTP/1.1" 200 1492
127.0.0.1 - - [07/Mar/2014:17:31:36 +0400] "GET /BugGitGwt/buggitgwt/gwt/clean/images/vborder.png HTTP/1.1" 200 298

or this:

INFO: The APR based Apache Tomcat Native library which allows optimal performance in 
production environments was not found on the 
java.library.path: C:\Program Files (x86)\Java\jdk1.6.0_45\bin;
C:\Windows\Sun\Java\bin;
C:\Windows\system32;
C:\Windows;C:\Program Files (x86)\Intel\iCLS Client\;
C:\Program Files\Intel\iCLS Client\;
C:\Program Files (x86)\AMD APP\bin\x86_64;
C:\Program Files (x86)\AMD APP\bin\x86;C:\Windows\system32;
C:\Windows;C:\Windows\System32\Wbem;
C:\Windows\System32\WindowsPowerShell\v1.0\;
C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static;
C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;
C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;
C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;
C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT; 
C:\Program Files (x86)\Java\jdk1.6.0_45\bin;
C:\apache-maven-3.1.1\bin;
C:\Program Files (x86)\MySQL\MySQL Utilities 1.3.6\;
C:\apache-ant-1.9.3\bin;
C:\Program Files (x86)\Java\jdk1.6.0_45\bin;
C:\Program Files (x86)\Git\bin; 
C:\Program Files (x86)\Git\cmd;;.

or this:

INFO: JSR 356 WebSocket (Java WebSocket 1.0) support is not available 
when running on Java 6. To suppress this message, run Tomcat on Java 7, 
remove the WebSocket JARs from $CATALINA_HOME/lib or add 
the WebSocketJARs to thetomcat.util.scan.DefaultJarScanner.jarsToSkip property in 
$CATALINA_BASE/conf/catalina.properties. Note that the deprecated Tomcat 7 
WebSocket API will be available. 

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
              http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         version="2.5"
         xmlns="http://java.sun.com/xml/ns/javaee">

  <!-- Servlets -->
  <servlet>
    <servlet-name>greetServlet</servlet-name>
    <servlet-class>ru.sersem.buggitgwt.server.DataProviderServiceImpl</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>greetServlet</servlet-name>
    <url-pattern>/buggitgwt/greet</url-pattern>
  </servlet-mapping>

  <!-- Default page to serve -->
  <welcome-file-list>
    <welcome-file>BugGitGwt.html</welcome-file>
  </welcome-file-list>

</web-app>

Service:

@RemoteServiceRelativePath("greet")
public interface DataProviderService extends RemoteService {
    List<List<String>> getDatabaseData(String call);
}

Answer 1

Step to follow to run GWT project from external server.

• Open command window

• Navigate to war folder that contains following things:

   war | |__GWTTestProject.html |__GWTTestProject.css |__gwttestproject folder | | | |__compiled js files and html files generated by GWT compilation | |__WEB-INF folder | |__classes |__deploy |__lib |__web.xml 

• Execute following command using Command prompt to create a war file

    jar -cf gwtproject.war * 

• Copy gwtproject.war under tomcat webapps
• start the server

Please check it again in following files:

web.xml:

  <servlet>
    <servlet-name>greetServlet</servlet-name>
    <servlet-class>com.gwt.test.server.GreetingServiceImpl</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>greetServlet</servlet-name>
    <url-pattern>/gwtproject/greet</url-pattern>
  </servlet-mapping>

GreetingService:

@RemoteServiceRelativePath("greet")
public interface GreetingService extends RemoteService {
    Long greetServer(String name) throws IllegalArgumentException;
}

Answer 2

Okay. There was a thing. We use Java 6 in our enterprise but GWT supports Java 7. So it works under java 7 in eclipse but in system environment it was down.