GROOVY-12457: Blocking parallel-collection callbacks can fail to run a queued sibling task by daniellansun · Pull Request #2986 · apache/groovy

daniellansun · 2026-10-18T08:55:09Z

https://issues.apache.org/jira/browse/GROOVY-12457

See also the flaky test:

ParallelCollectionTest > testEachParallelRunsConcurrently() FAILED
    java.lang.reflect.UndeclaredThrowableException
        at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62)
        at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502)
        at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:486)
        at java.base/java.util.concurrent.ForkJoinTask.getThrowableException(ForkJoinTask.java:540)
        at java.base/java.util.concurrent.ForkJoinTask.reportException(ForkJoinTask.java:567)
        at java.base/java.util.concurrent.ForkJoinTask.join(ForkJoinTask.java:653)
        at org.codehaus.groovy.runtime.ParallelCollectionExtensions.lambda$eachParallel$1(ParallelCollectionExtensions.java:87)
        at org.codehaus.groovy.runtime.ParallelCollectionExtensions.withCurrentFJP(ParallelCollectionExtensions.java:298)
        at org.codehaus.groovy.runtime.ParallelCollectionExtensions.eachParallel(ParallelCollectionExtensions.java:86)
        at TestScript104$_run_closure1.doCall(TestScript104.groovy:13)
        at groovy.lang.Closure.invokeHandle(Closure.java:647)
        at groovy.lang.Closure.invokeCached(Closure.java:618)
        at groovy.lang.Closure.call(Closure.java:584)
        at org.codehaus.groovy.runtime.ConvertedClosure.invokeCustom(ConvertedClosure.java:55)
        at org.codehaus.groovy.runtime.ConversionHandler.invoke(ConversionHandler.java:115)
        at jdk.proxy1/jdk.proxy1.$Proxy49.apply(Unknown Source)
        at groovy.concurrent.AsyncScope.lambda$withScope$0(AsyncScope.java:167)
        at org.apache.groovy.runtime.async.ScopedLocal$Carrier.lambda$call$0(ScopedLocal.java:320)
        at org.apache.groovy.runtime.async.ScopedLocal$ThreadLocalImpl.bind(ScopedLocal.java:428)
        at org.apache.groovy.runtime.async.ScopedLocal$Carrier.lambda$execute$1(ScopedLocal.java:338)
        at org.apache.groovy.runtime.async.ScopedLocal$Carrier.execute(ScopedLocal.java:340)
        at org.apache.groovy.runtime.async.ScopedLocal$Carrier.call(ScopedLocal.java:320)
        at org.apache.groovy.runtime.async.ScopedLocal.where(ScopedLocal.java:220)
        at org.apache.groovy.runtime.async.DefaultAsyncScope.withCurrent(DefaultAsyncScope.java:99)
        at groovy.concurrent.AsyncScope.withCurrent(AsyncScope.java:121)
        at groovy.concurrent.AsyncScope.withScope(AsyncScope.java:167)
        at groovy.concurrent.ParallelScope.lambda$withPool$0(ParallelScope.java:73)
        at org.apache.groovy.runtime.async.ScopedLocal$Carrier.lambda$call$0(ScopedLocal.java:320)
        at org.apache.groovy.runtime.async.ScopedLocal$ThreadLocalImpl.bind(ScopedLocal.java:428)
        at org.apache.groovy.runtime.async.ScopedLocal$Carrier.lambda$execute$1(ScopedLocal.java:338)
        at org.apache.groovy.runtime.async.ScopedLocal$Carrier.execute(ScopedLocal.java:340)
        at org.apache.groovy.runtime.async.ScopedLocal$Carrier.call(ScopedLocal.java:320)
        at org.apache.groovy.runtime.async.ScopedLocal.where(ScopedLocal.java:220)
        at org.apache.groovy.runtime.async.DefaultPool.withCurrent(DefaultPool.java:143)
        at groovy.concurrent.Pool.withCurrent(Pool.java:135)
        at groovy.concurrent.ParallelScope.withPool(ParallelScope.java:73)
        at TestScript104.run(TestScript104.groovy:8)
        at groovy.lang.GroovyShell.evaluate(GroovyShell.java:552)
        at groovy.lang.GroovyShell.evaluate(GroovyShell.java:587)
        at groovy.lang.GroovyShell.evaluate(GroovyShell.java:571)
        at groovy.test.GroovyAssert.assertScript(GroovyAssert.java:107)
        at groovy.test.GroovyAssert.assertScript(GroovyAssert.java:97)
        at groovy.concurrent.ParallelCollectionTest.testEachParallelRunsConcurrently(ParallelCollectionTest.groovy:46)

        Caused by:
        java.lang.reflect.UndeclaredThrowableException
            at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502)
            at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:486)
            at java.base/java.util.concurrent.ForkJoinTask.getThrowableException(ForkJoinTask.java:540)
            at java.base/java.util.concurrent.ForkJoinTask.reportException(ForkJoinTask.java:567)
            at java.base/java.util.concurrent.ForkJoinTask.invoke(ForkJoinTask.java:670)
            at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateParallel(ForEachOps.java:160)
            at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateParallel(ForEachOps.java:174)
            at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:233)
            at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596)
            at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:765)
            at org.codehaus.groovy.runtime.ParallelCollectionExtensions.lambda$eachParallel$0(ParallelCollectionExtensions.java:87)
            at java.base/java.util.concurrent.ForkJoinTask$AdaptedRunnableAction.exec(ForkJoinTask.java:1403)
            at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:387)
            at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1312)
            at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1843)
            at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1808)
            at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:188)

            Caused by:
            java.lang.reflect.UndeclaredThrowableException
                at jdk.proxy1/jdk.proxy1.$Proxy57.accept(Unknown Source)
                at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
                at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:1024)
                at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
                at java.base/java.util.stream.ForEachOps$ForEachTask.compute(ForEachOps.java:291)
                at java.base/java.util.concurrent.CountedCompleter.exec(CountedCompleter.java:754)
                ... 5 more

                Caused by:
                java.util.concurrent.TimeoutException
                    at java.base/java.util.concurrent.CyclicBarrier.dowait(CyclicBarrier.java:259)
                    at java.base/java.util.concurrent.CyclicBarrier.await(CyclicBarrier.java:437)
                    at TestScript104$_run_closure1$_closure2.doCall(TestScript104.groovy:15)
                    at groovy.lang.Closure.invokeHandle(Closure.java:647)
                    at groovy.lang.Closure.invokeCached(Closure.java:618)
                    at groovy.lang.Closure.call(Closure.java:584)
                    at org.codehaus.groovy.runtime.ConvertedClosure.invokeCustom(ConvertedClosure.java:55)
                    at org.codehaus.groovy.runtime.ConversionHandler.invoke(ConversionHandler.java:115)
                    ... 11 more

codecov-commenter · 2026-10-18T09:30:15Z

Codecov Report

❌ Patch coverage is 92.22222% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 72.4222%. Comparing base (d77e6df) to head (ef1eba6).

Files with missing lines	Patch %	Lines
...s/groovy/runtime/ParallelCollectionExtensions.java	91.9540%	6 Missing and 1 partial ⚠️

Additional details and impacted files

@@                Coverage Diff                 @@
##               master      #2986        +/-   ##
==================================================
+ Coverage     72.4166%   72.4222%   +0.0056%     
- Complexity      40606      40633        +27     
==================================================
  Files            1643       1643                
  Lines          142633     142698        +65     
  Branches        26788      26790         +2     
==================================================
+ Hits           103290     103345        +55     
- Misses          29850      29855         +5     
- Partials         9493       9498         +5

Files with missing lines	Coverage Δ
...a/org/apache/groovy/runtime/async/DefaultPool.java	`63.0435% <100.0000%> (-0.7863%)`	⬇️
...s/groovy/runtime/ParallelCollectionExtensions.java	`90.4762% <91.9540%> (+0.4762%)`	⬆️

... and 13 files with indirect coverage changes

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❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
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github-actions · 2026-10-18T09:52:52Z

JMH summary — classic (commit `c28bff4`)

Speedup vs trailing 90-day baseline on gh-pages. Higher = faster.
1.00 = in line with history. Per-benchmark ratio, geomean within group.
Time-per-op units inverted so direction is consistent. The calibrated
column divides out this runner's speed vs the baseline hardware, as
measured by Groovy-independent pure-Java ruler benchmarks.

Group	Speedup	Calibrated	n
bench	0.943 ×	0.964 ×	124
core	1.273 ×	1.217 ×	108
grails	1.139 ×	0.958 ×	80

⚠️ 1 benchmark at least 1.5× slower than the 90-day baseline:

org.apache.groovy.bench.SameClassesGuardMhBench.collector_arity2 — 1.55× slower (calibrated)

⚠️ Runner speed differs ≥15% from the historical baseline hardware for: core-hz, grails-ez. Raw speedups are not meaningful for those parts — use the calibrated column.

_{Runner calibration (this run vs baseline hardware): bench 0.97× (27 rulers) · core-ag 0.94× (3 rulers) · core-hz 1.27× (3 rulers) · grails-ad 0.96× (3 rulers) · grails-ez 1.42× (3 rulers)}

_{Baseline: dev/bench/jmh/<part>/classic/data.js on gh-pages, trailing 90 days. Daily dashboard · Per-suite raw data}

github-actions · 2026-10-18T09:59:48Z

JMH summary — indy (commit `c28bff4`)

Speedup vs trailing 90-day baseline on gh-pages. Higher = faster.
1.00 = in line with history. Per-benchmark ratio, geomean within group.
Time-per-op units inverted so direction is consistent. The calibrated
column divides out this runner's speed vs the baseline hardware, as
measured by Groovy-independent pure-Java ruler benchmarks.

Group	Speedup	Calibrated	n
bench	0.980 ×	1.037 ×	124
core	2.312 ×	2.422 ×	108
grails	1.692 ×	1.457 ×	80

⚠️ 1 benchmark at least 1.5× slower than the 90-day baseline:

org.apache.groovy.perf.grails.MetaclassVariationBench.perInstanceMetaclass — 1.60× slower (calibrated)

⚠️ Runner speed differs ≥15% from the historical baseline hardware for: grails-ez. Raw speedups are not meaningful for those parts — use the calibrated column.

_{Runner calibration (this run vs baseline hardware): bench 0.95× (27 rulers) · core-ag 0.96× (3 rulers) · core-hz 0.95× (3 rulers) · grails-ad 0.93× (3 rulers) · grails-ez 1.39× (3 rulers)}

_{Baseline: dev/bench/jmh/<part>/indy/data.js on gh-pages, trailing 90 days. Daily dashboard · Per-suite raw data}

…a queued sibling task

sonarqubecloud · 2026-10-18T15:24:44Z

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
93.5% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

testlens-app · 2026-10-18T15:52:10Z

✅ All tests passed ✅

🏷️ Commit: ef1eba6
▶️ Tests: 122144 executed
⚪️ Checks: 33/33 completed

Learn more about TestLens at testlens.app/docs.

daniellansun requested a review from paulk-asert October 18, 2026 08:55

GROOVY-12457: Blocking parallel-collection callbacks can fail to run …

ef1eba6

…a queued sibling task

asf-gitbox-commits force-pushed the GROOVY-12457 branch from c5a58cb to ef1eba6 Compare October 18, 2026 14:47

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GROOVY-12457: Blocking parallel-collection callbacks can fail to run a queued sibling task - #2986

GROOVY-12457: Blocking parallel-collection callbacks can fail to run a queued sibling task#2986
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JMH summary — classic (commit `c28bff4`)

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JMH summary — indy (commit `c28bff4`)