HTTP proxy is not used

[tpokki]

Command:

$ mvn -X -s m.xml versions:dependency-updates-report

Settings (m.xml):

<?xml version="1.0" encoding="UTF-8"?>
<settings>
  <proxies>
    <proxy>
      <id>proxy</id>
      <active>true</active>
      <protocol>http</protocol>
      <host>proxy.corporate.com</host>
      <port>8585</port>
      <username></username>
      <password></password>
      <nonProxyHosts></nonProxyHosts>
    </proxy>
  </proxies>
</settings>

Log output (I've enabled http logging on debug level):

[INFO] --- versions-maven-plugin:2.7:dependency-updates-report (default-cli) @ our-project ---

...

[DEBUG]   (f) remotePluginRepositories = [      id: central
      url: https://repo.maven.apache.org/maven2
   layout: default
    proxy: proxy.corporate.com:8585
snapshots: [enabled => false, update => daily]
 releases: [enabled => true, update => never]

...

[INFO] artifact com.datastax.cassandra:cassandra-driver-core: checking for updates from central
[DEBUG] Connection request: [route: {s}->https://repo.maven.apache.org:443][total kept alive: 0; route allocated: 3 of 20; total allocated: 3 of 40]
[DEBUG] Using proxy proxy.corporate.com:8585 for https://repo.maven.apache.org/maven2
[DEBUG] Connection leased: [id: 4][route: {s}->https://repo.maven.apache.org:443][total kept alive: 0; route allocated: 4 of 20; total allocated: 4 of 40]
[DEBUG] CookieSpec selected: compatibility
[DEBUG] Opening connection {s}->https://repo.maven.apache.org:443
[DEBUG] Connection request: [route: {s}->https://repo.maven.apache.org:443][total kept alive: 0; route allocated: 4 of 20; total allocated: 4 of 40]
[DEBUG] Connecting to repo.maven.apache.org/151.101.84.215:443

The connection timeouts eventually, and the check continues to next dependency.

Netstat shows attempts to connect the maven central directly, and not use the proxy:

[root@50daeb5d60bb /]# netstat -an
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0      1 172.17.0.2:40474        151.101.84.215:443      SYN_SENT
tcp        0      1 172.17.0.2:40480        151.101.84.215:443      SYN_SENT
tcp        0      1 172.17.0.2:40478        151.101.84.215:443      SYN_SENT
tcp        0      1 172.17.0.2:40476        151.101.84.215:443      SYN_SENT

We are using the same proxy, and configuration, widely for various other maven builds without issues.

[sellersj]

I see that your proxy setting you have the http but are contacting a https url.
Try changing the proxy setup to be https.