Maven stuck downloading maven-default-http-blocker

Question

I'm building a provided Google Dataflow template here. So I'm running the command:

mvn compile exec:java \
-Dexec.mainClass=com.google.cloud.teleport.templates.<template-class> \
-Dexec.cleanupDaemonThreads=false \
-Dexec.args=" \
--project=<project-id> \
--stagingLocation=gs://<bucket-name>/staging \
--tempLocation=gs://<bucket-name>/temp \
--templateLocation=gs://<bucket-name>/templates/<template-name>.json \
--runner=DataflowRunner"

However, it seems the compile is stuck downloading maven-default-http-blocker. The log I have after adding -X is:

[DEBUG] Could not find metadata io.grpc:grpc-api/maven-metadata.xml in local (/Users/bli00/.m2/repository)
[DEBUG] Skipped remote request for io.grpc:grpc-api/maven-metadata.xml, locally cached metadata up-to-date
[DEBUG] Could not find metadata io.grpc:grpc-netty-shaded/maven-metadata.xml in local (/Users/bli00/.m2/repository)
[DEBUG] Skipped remote request for io.grpc:grpc-netty-shaded/maven-metadata.xml, locally cached metadata up-to-date
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for confluent (http://packages.confluent.io/maven/).
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for ow2-snapshot (http://repository.ow2.org/nexus/content/repositories/snapshots).
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for repository.jboss.org (http://repository.jboss.org/nexus/content/groups/public/).
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for m2.dev.java.net (http://download.java.net/maven/2).
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for m2.java.net (http://download.java.net/maven/2).
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for glassfish-repository (http://maven.glassfish.org/content/groups/glassfish).
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for maven2-repository.dev.java.net (http://download.java.net/maven/2/).
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for java.net (http://download.java.net/maven/2).
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for m1.java.net (http://download.java.net/maven/1).
[DEBUG] Using mirror maven-default-http-blocker (http://0.0.0.0/) for sonatype-nexus-snapshots (http://oss.sonatype.org/content/repositories/snapshots).
[DEBUG] Could not find metadata net.minidev:json-smart/maven-metadata.xml in local (/Users/bli00/.m2/repository)
[DEBUG] Skipped remote request for net.minidev:json-smart/maven-metadata.xml, locally cached metadata up-to-date
[DEBUG] net.minidev:json-smart/maven-metadata.xml was not found in https://repository.apache.org/content/repositories/snapshots during a previous attempt. This failure was cached in the local repository and resolution is not be reattempted until the update interval of apache.snapshots.https has elapsed or updates are forced
[DEBUG] Using transporter WagonTransporter with priority -1.0 for http://0.0.0.0/
[DEBUG] Using connector BasicRepositoryConnector with priority 0.0 for http://0.0.0.0/
Downloading from maven-default-http-blocker: http://0.0.0.0/net/minidev/json-smart/maven-metadata.xml

Not sure how maven works but I've tried mvn clean and rerunning. And I'm assuming 0.0.0.0 is my local cache? Any idea how to proceed?

Answer 1

Starting from Maven 3.8.1, http repositories are blocked.

You need to either configure them as mirrors in your settings.xml or replace them by https repositories (if those exist).