[Task]: Support more ways than Maven Central to download jars for Python x-lang use cases

[liferoad]

What needs to happen?

Context:

https://www.sonatype.com/blog/from-abuse-to-alignment-why-we-need-sustainable-open-source-infrastructure

Errors Beam users could see:

RuntimeError: Unable to fetch remote job server jar at https://repo.maven.apache.org/maven2/org/apache/beam/beam-sdks-java-extensions-schemaio-expansion-service/2.63.0/beam-sdks-java-extensions-schemaio-expansion-service-2.63.0.jar: HTTP Error 403: Forbidden. If no Internet access at runtime, stage the jar at /root/.apache_beam/cache/jars/beam-sdks-java-extensions-schemaio-expansion-service-2.63.0.jar

We should provide more ways for users not to rely on Maven Central.

Related code:

beam/sdks/python/apache_beam/utils/subprocess_server.py

Line 338 in bb340c2

def path_to_maven_jar(

beam/sdks/python/apache_beam/utils/subprocess_server.py

Line 440 in bb340c2

url_read = urlopen(url)

Issue Priority

Priority: 1 (urgent / mostly reserved for critical bugs)

Issue Components

• Component: Python SDK
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[brianf]

We (Sonatype / Maven Central) have encountered instances where organizations that have a repository manager are getting throttled because beam jobs are bypassing it as it is hard coded to Central. Other enterprises who have services dependent on this are also affected because they are unable to direct this to a controlled mirror.

[liferoad]

Agree with you, @brianf. We will add the option to override the Central.