Failed to Download gradle-5.6-bin.zip
Symptom
An error is reported if the network is inaccessible when you run the /gradlew shadowJar command in step 4 of 6.

Key Process and Cause Analysis
Network access fails.
Conclusion and Solution
- Manually download the file to the current directory.
wget https://services.gradle.org/distributions/gradle-5.6-bin.zip

- Modify the file.
./gradle/wrapper/gradle-wrapper.properties
- Change the value of distributionUrl to gradle-5.6-bin.zip in the local directory and run the following command again:
./gradlew shadowJar
Parent topic: Troubleshooting