[836] xtable-spark-runtime: thin drop-in Spark bundle (Hudi 0.x)#843
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vinishjail97 wants to merge 8 commits into
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[836] xtable-spark-runtime: thin drop-in Spark bundle (Hudi 0.x)#843vinishjail97 wants to merge 8 commits into
vinishjail97 wants to merge 8 commits into
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Ports the xtable-spark-runtime packaging slice onto the Hudi 0.x line
(main-hudi-0x, Hudi 0.14 / Spark 3.4). New thin, relocated bundle that
runs an incremental XTable sync inside a Spark job; engines are provided
by the cluster, never bundled.
Module:
- xtable-spark-runtime_${scala.binary.version}: xtable-core compile;
Spark/Hadoop and the engines (Hudi/Iceberg/Delta) provided. Curated
shade allowlist (xtable modules + guava/protobuf/commons-cli relocated);
avro/parquet/jackson NOT relocated (exchanged with the engines). Thin
~3.7 MB bundle.
- XTableSparkSync: standalone spark-submit entry point (Apache Commons CLI).
- XTableSyncService / TableSyncSpec: build an INCREMENTAL ConversionConfig
and run ConversionController.sync; target metadata path = source data
path (required by Hudi; Iceberg data lives under <basePath>/data).
Hudi 0.14 specifics (vs the Hudi 1.x variant on main):
- No hudi-hadoop-common (that split is 1.x); hudi-common provides FSUtils.
- Engine classpath uses the hudi-spark bundle (its regenerated Avro model
classes link on Avro 1.12, which Iceberg 1.9.2 requires) plus
hudi-java-client for the Hudi target's Java write client, with the raw
hudi-common excluded so the bundle's clean DecimalWrapper wins.
ConversionTargetFactory: make ServiceLoader discovery resilient so a
subset of engines works when others are absent (warn + skip on
LinkageError/ServiceConfigurationError; name-based Delta-Kernel check).
ITXTableSparkRuntimeBundle: spark-submits the shaded jar for one case per
direction across Hudi, Iceberg and Delta (source and target), engines on
a flat classpath, asserting data-equivalence over comparable scalar
columns. Requires a Spark 3.4 SPARK_HOME; skipped otherwise.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
vinishjail97
commented
Jul 10, 2026
…sing, RFC) Publish the shaded jar as the MAIN artifact with a dependency-reduced POM (shadedArtifactAttached=false, createDependencyReducedPom=true), matching iceberg-spark-runtime / hudi-spark-bundle. Resolving the coordinate via a Maven dependency or --packages now yields the relocated bundle and pulls no un-relocated transitive deps; --jars is equivalent. The thin main jar + separate -bundle classifier (which re-introduced the cluster guava clash) is gone. IT findBundleJar() now picks the shaded main jar. Pass release/scripts/validate_shaded_license_coverage.sh (the existing allowlist gate): the shade <includes> must equal the runtime dependency tree, so jackson / scala-library / log4j-1.2-api - which every Spark runtime supplies - are declared provided (dropped from the tree, kept off the shaded jar) and excluded from the IT's flat engine classpath so Spark's own copies win. avro/parquet stay on the flat classpath (the engine's newer avro must win over Spark 3.4's). Bundled-dependency licensing: add META-INF/LICENSE-bundled and NOTICE-bundled (wired via IncludeResourceTransformer) attributing the only bundled third-party - guava's closure (Apache-2.0) and commons-cli (Apache-2.0), plus checker-qual (MIT). Remove the dead protobuf-java allowlist entry and relocation: protobuf resolves as provided and was never bundled. RFC-3: scope v1 to the CLI (XTableSparkSync); mark the config-only XTableSyncListener on-ramp (and XTableSparkConfig / PlanTargetResolver) as a deferred follow-up. Fix the activation example to the shipped CLI and document the required engine Avro version + flat-classpath placement. XTableSyncService: normalize sourceFormat with Locale.ROOT. Root pom: exclude the shade-generated dependency-reduced-pom.xml from spotless (no license header; CI runs clean install). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Consolidate repeated rationale in the bundle pom (no functional change): - Tell the hudi-common DecimalWrapper / Avro-1.8-1.9 story once (on the hudi-spark bundle dep); the hudi-java-client exclusion just points to it. - State "engine Avro must win on a flat classpath" once (engine-classpath plugin); the avro dep and excludeGroupIds comments reference it. - Explain jackson/scala-library are Spark-supplied once. - Fix a stale "Spark 3.5" reference to Spark 3.4 (this is the Hudi 0.x line). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add main-hudi-0x to the push and pull_request branch filters of both workflows (same change as apache#841) so CI runs on PRs targeting the Hudi 0.x release line, including this one. A pull_request workflow's branch filter takes effect from the PR's own branch, so this makes CI fire on apache#843. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
vinishjail97
marked this pull request as ready for review
July 10, 2026 01:29
…k-submit stdout off-thread - ConversionTargetFactory: hasNext() resolves provider classes lazily and can throw ServiceConfigurationError too, so move it inside the existing ServiceConfigurationError|LinkageError guard alongside next(). - ITXTableSparkRuntimeBundle: drain spark-submit stdout on a background thread so a hung process is caught by waitFor(10min) instead of blocking forever on readOutput() reading until EOF.
main-hudi-0x was deleted and replaced by branch-0.4 (the 0.4.0 release line), so update the push/pull_request branch filters accordingly.
…istro ITXTableSparkRuntimeBundle spark-submits the shaded bundle jar and self-skips unless SPARK_HOME is set, so the main CI never runs it. Add a path-filtered workflow that installs a matching Spark 3.4 distribution from the Apache archive, sets SPARK_HOME, and runs the failsafe IT.
…filter) The workflow is intended to be a required status check on branch-0.4. A required check whose workflow is skipped by a path filter never reports, leaving PRs blocked on a pending check, so run it unconditionally on the covered branches. The Spark distro is cached, so the added cost is the reactor build plus the ~20s IT.
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Ports
xtable-spark-runtimeonto the Hudi 0.x line (branch-0.4, Hudi 0.14 / Spark 3.4) — a thin, relocated Spark bundle that runs an incremental XTable sync in-job; engines are provided by the cluster, never bundled. Hudi-0.x counterpart of #838; part of the 0.4.0 on-ramp.xtable-spark-runtime(~3.7 MB) withXTableSparkSyncspark-submitentry point; resilientConversionTargetFactoryServiceLoader discovery so a subset of engines works when others are absent.hudi-hadoop-common(1.x split); engine classpath uses thehudi-sparkbundle so Avro model classes link on Avro 1.12 (Iceberg 1.9.2), plushudi-java-client.ITXTableSparkRuntimeBundlecovers each direction across Hudi/Iceberg/Delta. It'sSPARK_HOME-gated, so a dedicated Spark Runtime Bundle Validation workflow installs Spark 3.4.3, setsSPARK_HOME, and runs it (green); the standard CI build skips it.