Error "Connect to central.maven.org:80 connection timed out" Reported During Compilation

Symptom

An error is reported during compilation:

1

Failed Connect to central.maven.org:80 connection timed out

Key Process and Cause Analysis

None

Conclusion and Solution

1. Open the java/Makefile file.

   1	vi java/Makefile

2. Press i to enter the insert mode and change the Maven repository address in line 190 to https://repo1.maven.org/maven2/.

   1	190 CENTRAL_REPO_URL?=https://repo1.maven.org/maven2/

3. Press Esc, type :wq!, and press Enter to save the file and exit.