mvnw Command Failed to Pull apache-maven

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Symptom

If the compilation environment requires a proxy to access the Internet, the apache-maven-3.5.0-bin.zip package may fail to be downloaded during the compilation.

Key Process and Cause Analysis

A proxy is used to access the Internet, which results in download failure of the required package during compilation.

Conclusion and Solution

Add a proxy in the mvnw script.

Open the mvnw script.
```
vim mvnw
```
Press i to enter the insert mode and add the following proxy code to the file:
```
"-Dhttp.proxyHost=127.0.0.1" "-Dhttp.proxyPort=3128" "-Dhttps.proxyHost=127.0.0.1" "-Dhttps.proxyPort=3128" \
```
In the preceding example, 127.0.0.1 and 3128 indicate the IP address and port number of the proxy host. Replace them with the actual ones.
Press Esc, type :wq!, and press Enter to save the file and exit.
Run the mvnw command again.
```
./mvnw clean install -Dgpg.skip=true
```

Parent topic: Troubleshooting