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While executing mvn install, I'm getting following error:

Error assembling WAR: webxml attribute is required (or pre-existing WEB-INF/web.xml if executing in update mode)

My web application structure tree is like that:

my-app |-- pom.xml |-- src |-- ... |-- WebContent |-- ... |-- META-INF |-- WEB-INF |-- classes |-- ... |-- lib |-- **web.xml**

My POM file looks like that:

<project> <modelVersion>4.0.0</modelVersion> <groupId>masters.traffic</groupId> <artifactId>traffic_web</artifactId> <packaging>war</packaging> <name>traffic_web</name> <version>0.1.0</version> <build> <sourceDirectory>src</sourceDirectory> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.6</source> <target>1.6</target> </configuration> </plugin> </plugins> </build> ... </project>

How to properly fix that issue ?

Regards

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5 Answers 5

Reset to default
19

I strongly recommend to use Maven's standard layout:

  • put the Java sources in src/main/java (and remove the sourceDirectory element)
  • put the Web application sources in src/main/webapp
  • remove the classes and lib directories under WEB-INF

Sure, you can customize the layout but this is IMO more troubles and useless efforts than benefits. Just follow the conventions.

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Thanks! I've spent a lot of time figuring out why JSF wasn't rendering and I had WEB-INF in a different directory, then, fiddling with the IDEA .iml file I got it working by adding a deployment descriptor for the web.xml, what's weird is that this then stopped working.. I guess now it'll work for good ;)
14

My guess is that maven-war-plugin is looking for src/main/webapp/WEB-INF/web.xml, but can't find it, and wants you to specify the (non-maven-standard) location explicitly. If you can't rename WebContent to webapp and move it under src/main/ (recommended), you could try adding something like this to your <build>

<plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <configuration> <webXml>${basedir}/src/WebContent/WEB-INF/web.xml</webXml> <warSourceDirectory>${basedir}/src/WebContent</warSourceDirectory> </configuration> </plugin>
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2 Comments

What if i have no web.xml in my web appliction ?
@Vivek add <failOnMissingWebXml>false</failOnMissingWebXml> to configuration
1

Take a look at this comment:

Maven: Including a META-INF folder in the classes folder

I believe Maven expects a folder called "webapp", not "WebContent".

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0

I ran into this issue recently and the problem was that my resource class was not specifying an initial path at the top of the class. Each method specifed a path, but there was nothing specifying the initial path.

Example:

@Path("/") public class MyResource { @GET @Produces("text/html") public String foo() { return "foo"; } @GET @Path("pt") @Produces("text/html") public String bar() { return "bar"; }

Will work just fine. But,

public class MyResource { @GET @Produces("text/html") public String foo() { return "foo"; } @GET @Path("pt") @Produces("text/html") public String bar() { return "bar"; }

will not

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If you're using eclispe, make sure to right click the project and create a Maven "project." You can compile as a batch from command line with updates using mvn generate:archetype -B -cpu but you might have to manually structure a few things. With this it will run as a web application or a client application. Add this code to pom.xml.

<build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <version>2.6</version> <configuration> <failOnMissingWebXml>false</failOnMissingWebXml> </configuration> </plugin> </plugins>
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