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[SPARK-30601][BUILD] Add a Google Maven Central as a primary repository #27307

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[SPARK-30601][BUILD] Add a Google Maven Central as a primary repository #27307

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91bf2c9
Add a fallback repository as GCS
HyukjinKwon Jan 21, 2020
81bc576
Fix comments
HyukjinKwon Jan 21, 2020
556b88d
switch the order
HyukjinKwon Jan 22, 2020
0b9d198
Use consistently in SBT as well
HyukjinKwon Jan 23, 2020
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8 changes: 0 additions & 8 deletions .github/workflows/master.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -66,14 +66,6 @@ jobs:
export MAVEN_OPTS="-Xmx2g -XX:ReservedCodeCacheSize=1g -Dorg.slf4j.simpleLogger.defaultLogLevel=WARN"
export MAVEN_CLI_OPTS="--no-transfer-progress"
mkdir -p ~/.m2
# `Maven Central` is too flaky in terms of downloading artifacts in `GitHub Action` environment.
# `Google Maven Central Mirror` is too slow in terms of sycing upstream. To get the best combination,
# 1) we set `Google Maven Central` as a mirror of `central` in `GitHub Action` environment only.
# 2) we duplicates `Maven Central` in pom.xml with ID `central_without_mirror`.
# In other words, in GitHub Action environment, `central` is mirrored by `Google Maven Central` first.
# If `Google Maven Central` doesn't provide the artifact due to its slowness, `central_without_mirror` will be used.
# Note that we aim to achieve the above while keeping the existing behavior of non-`GitHub Action` environment unchanged.
echo "<settings><mirrors><mirror><id>google-maven-central</id><name>GCS Maven Central mirror</name><url>https://maven-central.storage-download.googleapis.com/repos/central/data/</url><mirrorOf>central</mirrorOf></mirror></mirrors></settings>" > ~/.m2/settings.xml
./build/mvn $MAVEN_CLI_OPTS -DskipTests -Pyarn -Pmesos -Pkubernetes -Phive -P${{ matrix.hive }} -Phive-thriftserver -P${{ matrix.hadoop }} -Phadoop-cloud -Djava.version=${{ matrix.java }} install
rm -rf ~/.m2/repository/org/apache/spark

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25 changes: 17 additions & 8 deletions pom.xml
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Expand Up @@ -246,10 +246,10 @@
</properties>
<repositories>
<repository>
<id>central</id>
<!-- This should be at top, it makes maven try the central repo first and then others and hence faster dep resolution -->
<name>Maven Repository</name>
<url>https://repo.maven.apache.org/maven2</url>
<id>google-maven-central</id>
<!-- This should be at top, it makes maven try this central repo first and then others and hence faster dep resolution -->
<name>GCS Maven Central mirror</name>
<url>https://maven-central.storage-download.googleapis.com/repos/central/data</url>
<releases>
<enabled>true</enabled>
</releases>
Expand All @@ -258,12 +258,10 @@
</snapshots>
</repository>
<repository>
<id>central_without_mirror</id>
<!--
This is used as a fallback when a mirror to `central` fail.
For example, when we use Google Maven Central in GitHub Action as a mirror of `central`,
this will be used when Google Maven Central is out of sync due to its late sync cycle.
This is used as a fallback when the first try fails.
-->
<id>central</id>
<name>Maven Repository</name>
<url>https://repo.maven.apache.org/maven2</url>
<releases>
Expand All @@ -275,6 +273,17 @@
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
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Yep. +1 for piggybacking this. I also agree that this is required to unblock #27279 .

<id>google-maven-central</id>
<name>GCS Maven Central mirror</name>
<url>https://maven-central.storage-download.googleapis.com/repos/central/data</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</pluginRepository>
<pluginRepository>
<id>central</id>
<url>https://repo.maven.apache.org/maven2</url>
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