during maven build [mvn install] dependencies not getting downloaded from repository

Question

I am new to pom but went through the "Getting started" on maven.apache.org and also referred to an existing project within the company before i started on this project.

Info: If i specify the jars as referenced libs in eclipse the project is running smooth and no issues are observed.

Problem: compilation errors since unable to download dependent code from repository.

My project structure is [simplified for easier understanding]

utils

utils/commons [has source in src/main/java style] [uses package org.apache.commons.io.IOUtils]

utils/commons/pom.xml

utils/pom.xml [parent]

Now I began with commons folder to write the pom.xml as the only module and no reference to any parent / other module. After I ran mvn install it gave errors as

ToolUtils.java:[17,28] error: package org.apache.commons.io does not exist
ToolUtils.java:[18,23] error: package org.apache.log4j does not exist

If i commented the code which was using org.apache.commons.io.IOUtils then the mvn install works fine and generates a jar. I looked up the net and found that the issue is failing to locate the repository so i updated the reference to parent pom.xml. And also included the repositories details in the parent pom.xml. [which is directly under utils folder]

I am still getting the same error and the build does not move further.

ToolUtils.java:[17,28] error: package org.apache.commons.io does not exist
ToolUtils.java:[18,23] error: package org.apache.log4j does not exist

I am using an internal URL which i have verified manually in a broswer. Also I have verified that the proxy details are correct since another old project refers to the same URL and is getting built properly. [Unfortunately the project is far too complex to copy paste the pom.xml and modify , hence writing the pom.xml from scratch.]

Can some point what am i missing which causes no download from repository ? Thanks in advance. Any help would be deeply appreciated.

Note: 1) I am pasting snippets from the 2 different pom.xml with their directory names for easier identification. Attachments can be provided on request. 2) I have modified the references to confidential data across to protect some identities.

utils/common/pom.xml [commons module]

....
<parent>
    <groupId>com.osg.rtos</groupId>
    <artifactId>rxutils</artifactId>
    <version>0.0.1-SNAPSHOT</version>
</parent>
....
    <dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>            
        </dependency>
        <dependency>
            <groupId>com.osg.rtos</groupId>
            <artifactId>rtos-commons-service</artifactId>
            <version>${rtos.version}</version>
        </dependency>
    </dependencies>
</dependencyManagement>

utils/pom.xml [parent]

....
<groupId>com.osg.rtos</groupId>
<artifactId>rxutils</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>rxutils</name>
<packaging>pom</packaging>  


<repositories>
    <repository>
        <id>release</id>
        <url>http://internal.com/~devbuild/repository</url>         
        <releases>
            <enabled>true</enabled>
        </releases>
        <snapshots>
            <enabled>true</enabled>
        </snapshots>
    </repository>
</repositories>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.16</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.4</version>
        </dependency>
        <dependency>
            <groupId>com.osg.rtos</groupId>
            <artifactId>rtos-commons-service</artifactId>
            <version>${rtos.version}</version>
        </dependency>
        <dependency>
            <groupId>com.osg.rtos</groupId>
            <artifactId>rtos-data</artifactId>
            <version>${rtos.version}</version>
        </dependency>
        <dependency>
            <groupId>com.osg.rtos</groupId>
            <artifactId>rtos-exception</artifactId>
            <version>${rtos.version}</version>
        </dependency>
        <dependency>
            <groupId>com.osg.rtos</groupId>
            <artifactId>rtos-mailbox-service</artifactId>
            <version>${rtos.version}</version>
        </dependency>
        <dependency>
            <groupId>com.osg.rtos</groupId>
            <artifactId>rtos-message-service</artifactId>
            <version>${rtos.version}</version>
        </dependency>
        <dependency>
            <groupId>com.osg.rtos</groupId>
            <artifactId>rtos-rest</artifactId>
            <version>${rtos.version}</version>
        </dependency>
    </dependencies>
</dependencyManagement>

<modules>
    <module>commons</module>        
    <module>rxutils</module>        
    <module>tool</module>        
</modules>  
...

Answer 1

You need to remove the <dependencyManagement> tags that surround the <dependencies> section in the commons module pom.xml.

The <dependencyManagement> section allows you to specify dependency information, such as version number, in a parent pom (as you have done) so that you can simplify dependencies in the child poms. However, you still need a <dependencies> section to specify what dependencies are required for that child.

Answer 2

in pom.xml use

<dependency> 
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
</dependency>

remove or comment <exclusions> and <exclusion>