integration cicd speedup: Enable Maven module parallelism#818
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dkropachev wants to merge 2 commits intoscylladb:scylla-4.xfrom
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integration cicd speedup: Enable Maven module parallelism#818dkropachev wants to merge 2 commits intoscylladb:scylla-4.xfrom
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Add MAVEN_PARALLEL_THREADS variable (default: 1C = 1 thread per CPU core) to the compile-all target. Use 'install' instead of 'compile test-compile' so that annotation processors (mapper-processor) are installed to the local repo before downstream modules (examples) start compiling.
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The examples module uses annotationProcessorPaths to reference mapper-processor, which Maven resolves from the local repo (not the reactor). With parallel builds (-T), examples can start compiling before mapper-processor is installed, causing a resolution failure. Split compile-all into two phases: parallel install of all modules except examples, then sequential compile of examples. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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CI Performance ResultsCompared PR #818 against baseline (PR #821). 3 failures are pre-existing flaky tests, not related to this PR.
No significant performance difference from this PR alone — within normal CI variance. The Maven module parallelism ( Failed tests (pre-existing, unrelated to this PR)
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Summary
MAVEN_PARALLEL_THREADSvariable (default:1C= 1 thread per CPU core) to the Makefilemake compile-all MAVEN_PARALLEL_THREADS=2if neededTest plan
make compile-allcompletes successfully with parallel buildsmake test-unitpasses with parallel module executionmake checkpasses