I have two identical WAR files: one packaged without Maven and one packaged using Maven. When I try to deploy the Maven packaged WAR using Tomcat I get an HTTP status 404 error (The requested resource is not available) The original WAR (packed without using Maven) runs smoothly.I am sure that the WAR packaged using Maven has all the required files since it is exactly the same as the original package. Any idea on how to solve this issue?
What is the name of the war files ? If they differ, tomcat deploys them on a different context path.
Maven usually puts the version at the end for example:
myproject.war would be deployed to localhost:8080/myproject
while myproject-1.0.0.war whould be deployed to localhost:8080/myproject-1.0.0/ (Not sure if it handles the dots)
You can try to rename the war files to the same path, or ROOT.war for "/"
Have you checked the catalina.out log ?
In scenarios like this I only trust tools that visualize if the bundles are really identical or not. I will show you some tools below (MS Windows tools).
Checksum tool:
http://code.kliu.org/hashcheck/
The tool will very quick give me a checksum of the entire bundle. And I can compare this against the other file.
Diff tool:
http://kdiff3.sourceforge.net/
If checksum are not the same you will need see the difference in the bundles.
In this case I would use some diff tool, like kDiff.
The web.xml - deployment descirptor
Some files are very important and you will need to check first, like the deployment descriptor web.xml in the WEB-INF folder. Verify its content, the security settings, configuration of your servlets etc. The "entry" to your web service.
Unzip and check the folders/files
You know that your war file is a normal "zip" bundle. Just unzip it and check the content. You can deploy to your tomcat as a unzipped war (i.e. the entire folder, the folder name will be your context-root).
Verify tomcat logs
Check your output upon deployment and access to the web solution. Look the tomcat logging level and increase the level and watch your logs.
Related
I am facing a problem by deploying a War file on a Tomcat Server.
My Tomcat Server configuration as follows:
My steps to deploy:
I created a WAR file in Eclipse Kepler (Windows 7 64 bit, no Maven used).
Uploaded it with a Tomcat Web Application Manager.
Clicked deploy.
Tomcat unpacks WAR file in tomcat/webapps and throws me NullPointerException. It is missing some files that should be imported to project to work it right.
When I was working in Eclipse, as a source for these files I gave a workspace path, given in the Server settings and adding the wtpwebapps folder, which was offered by Eclipse by default. So my complete path looks like this:
C:\Users\myUserName\kepler\workspace.metadata.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\myProjectName\WEB-INF\classes\project\fdsProject\FDS.prj
Now, when I deploy the project, it locates in a webapps folder, not in wtpwebapps and if I try to start in a browser, it shows me NullPointerException. But as soon as I copy the wtpwebapps folder from my workspace to the tomcat installation folder, near webapps, my project is starting successfully.
It means that I cannot start my project on another server, just deploying a standalone WAR file. I must add manually the wtpwebapps with my project in into the tomcat server installation folder. How can I optimize it and start project just with a WAR file deployed?
Thank you!
EDIT
My project structure is looking like this:
Stop the Tomcat Server
In the settings view Tomcat Server settings in Eclipse -> Server
Locations, check Use Tomcat Installation(...）
Now, you can change the Deploy Path, if you want webapps, then input it.
EDIT
The values below control how tomcat deal with war file
autoDeploy="true"
unpackWARs="true"
Just search these values in your server.xml file and edit values as you need.
If you want to be able to deploy your app as a WAR file, you need to refer to everything within it relative to the app itself, not with absolute file paths, not even as file paths if you can. If you have code that requires a java.io.File, rewrite it. The point is that you don't care where things are, you just care about how to get to their contents. For a Servlet, you can read anything on the web app's classpath by calling getResourceAsStream() on the correct class or classloader.
See getResourceAsStream() vs FileInputStream .
I am currently working on an EAR application which has a WEB project and EJB project in it.
To work on eclipse with local set up i do so many build path setups and all.
All these buildpaths show up in .classpath of the project.
Now when i export the EAR and deploy on Server everything works on server.
My doubt is how does server know about my local system paths which are present in .classpath of my project.
Does it mean .classpath has no significance at runtime?
Please explain.
.classpath file is eclipse specific, it will not be bundled with the EAR. Eclipse uses it to set the classpath for the project.
An EAR has a well defined structure and Servlet container understands that structure, using it's knowledge it prods around in the EAR file and extracts classes to load in the runtime.
Obviously server doesn't have any knowledge of your local environment. An EAR (or WAR or JAR) file is a simple archive file (with some specification or the file order and all). You can unzip it using any utility (something like 7zip). Check the structure of the packed EAR, that will give you a better understanding of what goes to your server.
We are migrating from Jboss-as to Jetty. As of now as part of the continuous build and deployment process, Jenkins/Maven is being used to build and deploy the WAR to remote Jboss using the management native port(hot deployment). No physical WAR file is placed under the deployments folder. Below maven plugin is being used.
org.jboss.as.plugins:jboss-as-maven-plugin:7.6.Final:deploy-only -Djboss-as.hostname=server name -Djboss-as.port=server port
We cannot copy the WAR to webapps folder due to some restrictions. I am looking for a solution similar to jboss-as-maven-plugin, since Chef/Puppet/Ant Script/Shell Script, is not feasible for us.
Is there any similar process for hot deploying to remote jetty server without physically copying the WAR file?
You could write a Servlet which does this.
It only needs to accept a POST request, which contains some additional parameter headers required for the deplyoment (for example the file name), and the WAR in the request body.
Then upload the the WAR by POSTing it to the Servlet URL.
The Servlet would just write the binary data to the Jetty webapps directory.
I have a project which in the meantime runs locally on Tomcat but I'm planning to deploy to some server in the future.
I have a few questions:
I'm using tomcat-jdbc.jar. How should I include that jar in the project? copy it to WEB-INF/lib or add a library reference to tomcat? is the latter portable? Can I use this jar even if the server I'm deploying to is using jetty?
When I added the JRE, eclipse asked me to point it to the JRE path. The line that was added in the classpath was
classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"
How does eclipse figure out from this line where the JRE is at?
When the project is deployed to the server, how would the project hierarchy look like?
My guess is:
<project name>
----<build> (.class files)
----<WebContent>
--------<META-INF>
------------MANIFEST.MF
--------<WEB-INF>
------------<lib>
----------------external_jar.jar
------------web.xml
---------index.html
Is this correct? if so, how will the runtime know where to find the JRE? or the tomcat-jdbc.jar which is in the Tomcat installation folder?
Your application needs the following three types of "resources"
System Resources: JRE classes, some extensions/libraries provided by the server you deploy on.
Your dependencies: Any libraries you use, say common-utils, poi etc. These JAR files go in your web-inf/lib folder
Your classes. These are deployed with the WAR file at web-inf/classes
So, to answer your questions:
If you are deploying to Tomcat, the tomcat-jdbc.jar will be provided. Take care of the version though. If your prod server will be tomcat but dev is say Jetty, then you need to provide this jar in your local IDE, but not export it in the WAR file. But if you are developing on tomcat and say deploying on some other server, then this jar has to be bundled with your war file (web-inf/lib folder). Dev and Prod servers need not be same, but take care of the JRE version and dependency on Prod server provided libraries.
JRE is a configurable setting for your server and also your IDE (Eclipse)
Project hierarchy is correct, but you will most probably deploy as WAR file, so your build folder is exported in web-inf/classes. You can verify by opening the WAR file with any zip editor.
Regarding the portability of tomcat-jdbc.jar
Unfortunately this depends on the tomcat library and version. There might be more dependencies of this jar file which might cause problems later on. I would recommend not relying on this jar unless you plan to deploy on tomcat.
you should test your application with the same server you're going to use in production.
to see and set the jre properties eclipse->preferences->java->Installed JREs.
If you export a war file, all files in WebContent will be in the war and the .class files from src folder will be in WEB-INF/classes.
When you uses a server like tomcat, it uses the configuration you setted on it.
If you want the application to always reference your jar, put it in the web-inf lib.
As Daniel has mentioned below,eclipse gets the JREs from the installed JREs under the preferences tab. You can have multiple JREs installed and configured in your eclipse and then select individually for a project and also select default.
3.Your project hierarchy is correct. The runtime will get the JRE from the JAVA_HOME environment variable set on the server.
1) Pool connections, it's a service provided by Application Server (Tomcat in this case). IMHO you have to avoid bind your application with specific implementation, in that case use generic javax.sql.DataSource for expample, and then "inject" or lookup the implmementation from the server. Then if you use Jetty, configure what you want as connection pool implementation https://wiki.eclipse.org/Jetty/Howto/Configure_JNDI_Datasource
So dont´t include in your web-inf/lib tomcat-jdbc.jar.
2) The "org.eclipse.jdt.launching.JRE_CONTAINER" it's a internal variable of eclipse and the value is what you configure on eclipse properties. It's used for eclipse to compile and run your app.
3) in your project structure ".class" files, must go in "WEB-INF/classes". That it's defined by servlet specification. Eclipse automatically generate the correct structure if you select yor project and with right click run "Export" --> "War file". Or you can use maven.
I've developed a small MVC project using Spring MVC, Hibernate, MySQL, Maven and Tomcat. I can run and test the application (locally) smoothly.
Now I need to publish/deploy this project on an (online) server that have only Tomcat installed on it. How can I publish/deploy the project online? Is there any special build I should do? What files I shall upload and to where?
There are several types of development options available.
For development on localhost EAR (Exploded ARchive) type of project is usually used (because you can easily make hot deploy on servery). But for production WAR (Web ARchive) is used (basically it's the same EAR archive, but compressed using ZIP algorithm).
If you want to deploy your project to remote Tomcat server then make your project as WAR archive and upload it to Tomcat's webapps directory. Then you might need to restart Tomcat. But it's manual way of deploying.
Better option is to use automated build tools (like Maven) which can compile your project, run unit tests, deploy on web server (local or remote) etc.
This one is a great example of how to deploy your project on Tomcat server by using Maven's tomcat-maven-plugin: http://www.mkyong.com/maven/how-to-deploy-maven-based-war-file-to-tomcat/
Good luck ;)
Do a mvn clean install and you will get a .war file in your target directory of web module.
Copy it and paste it in tomcat_home/webapps directory and restart tomcat. Thats it. now, you can access it in whatever configured port (eg: http://localhost:8080/<your webapp war name>). lets say your war name is myapp.war, then tomcat would have extracted it into myapp folder in webapps.
so your url will be http://localhost:8080/myapp
With maven deploy command, usually gets errors for various reasons.
if you work in Unix/Linux system, I recommend using "rsync" method on console. (You can write own shell script to manage easily). It helps not only deploying without a problem but also helps to get time while redeploying (only uploading changed / new files). Because maven deploy / redeploy uploads your project as a bundle in jar/war. However "rysnc" method uploads your project files one by one.
Before using it, you should sure that two conditions.
1- your project is built in target folder (Spring Tool Suite)
2- you have access to tomcat via ssh
example code : (v_ : prefix which is variable(customizable))
rsync -avz v_your_project_in_target root#v_ip:v_tomcat_name/webapps/v_project_name
(Second sharing)