Maven - Troubleshooting

1. Re-download MAVEN repository: 
Only download repository dependency, not test the code.

• mvn clean compile -DskipTests=true

2. Proxy - (In case proxy used in Workplace): 

   Note: Set Proxy first; then download repository

    2.1 Locate "Auto Proxy Script"

• Control Panel/ Internet Options/ Connections Tab/ LAN Settings 

    2.2 Download "Proxy Data File"

    2.3 Select a proxy setting as below:

• var some_id = "PROXY some_host.com:some_port";

    2.4 Now set proxy in settings.xml config file:
         Note: some one save it under .../.m2/ folder 

• Open settings.xml from %M2_HOME%\conf directory
• Edit settings.xml as below:

      <proxy>

              <id> some_id </id>

              <active> true </active>

              <protocol> http </protocol>

              <host> some_host </host>

              <port> some_port </port>

      </proxy>

3. Force Maven to Re-download A particular Repository

    When Maven encounters a problem and unable to download A repository --> We need to use this command to re-download that Repo after problem has been solved.

• mvn dependency:purge-local-repository

4. Force Maven to Update dependencies

    Note: Used for update the jar files

• mvn clean compile -U -DskipTests=true