Wsrtjtyk

Below is my configuration of maven-assembly-plugin and it's working fine.but when i am adding my all plugins inside the pluginManagement parent tag it's not working.

I am not sure why it's not working

<plugin>

            <artifactId>maven-assembly-plugin</artifactId>

            <version>2.2</version>

            <executions>

                <execution>

                    <id>MyId</id>

                    <phase>package</phase>

                    <goals>

                        <goal>single</goal>

                    </goals>

                    <configuration>

                        <descriptor>assemblyFile.xml</descriptor>

                        <appendAssemblyId>false</appendAssemblyId>

                    </configuration>

                </execution>

            </executions>

        </plugin>

The execution section of your maven-assembly-plugin should not be contained in a pluginManagement section. If it is, it will be ignored. The build will not throw an error - just won't create an executable jar. Then you would get "no main manifest attribute..." if you try to run it.

The pluginManagement section, generally defined in a "parent" pom, shares plugin configuration across modules. It can specify version and configuration and it ensures the version matches across child poms, but is not intended to contain execution details.

Here's a valid example where pluginManagement specifies only the plugin's version (just keep in mind the pluginManagement would typically be in a separate, parent, pom):

<build>

    <pluginManagement>

        <plugins>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-assembly-plugin</artifactId>

                <version>2.4.1</version>

            </plugin>

        </plugins>

    </pluginManagement>

    <plugins>

        <plugin>

            <artifactId>maven-assembly-plugin</artifactId>

            <configuration>

                <descriptorRefs>

                    <descriptorRef>jar-with-dependencies</descriptorRef>

                </descriptorRefs>

                <archive>

                    <manifest>

                        <mainClass>com.my.App</mainClass>

                    </manifest>

                </archive>

            </configuration>

            <executions>

                <execution>

                    <id>make-assembly</id>

                    <phase>package</phase>

                    <goals>

                        <goal>single</goal>

                    </goals>

                </execution>

            </executions>

        </plugin>

    </plugins>

</build>

And here's an example where pluginManagement has the plugin's version and also its configuration. The regular plugin section specifies only the execution details:

<build>

    <pluginManagement>

        <plugins>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-assembly-plugin</artifactId>

                <version>2.4.1</version>

                <configuration>

                    <descriptorRefs>

                        <descriptorRef>jar-with-dependencies</descriptorRef>

                    </descriptorRefs>

                    <archive>

                        <manifest>

                            <mainClass>com.my.App</mainClass>

                        </manifest>

                    </archive>

                </configuration>

            </plugin>

        </plugins>

    </pluginManagement>

    <plugins>

        <plugin>

            <artifactId>maven-assembly-plugin</artifactId>

            <version>2.3</version>

            <executions>

                <execution>

                    <id>make-assembly</id>

                    <phase>package</phase>

                    <goals>

                        <goal>single</goal>

                    </goals>

                </execution>

            </executions>

        </plugin>

    </plugins>

</build>

Note that child poms can override pluginManagement definitions.

See also this question and its answers.