java.util.ConcurrentModificationException at cucumber.runtime.xstream.LocalizedXStreams$LocalizedXStream.unsetParameterInfo(LocalizedXStreams.java:81)

[jasonboggess]

We are attempting to run Cucumber tests in parallel, but running into the following error. It looks like it's happening when Cucumber is attempting to read the parameters for the test.

Found #554 that might fix the issue.

java.util.ConcurrentModificationException
    at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:819)
    at java.util.ArrayList$Itr.next(ArrayList.java:791)
    at cucumber.runtime.xstream.LocalizedXStreams$LocalizedXStream.unsetParameterInfo(LocalizedXStreams.java:81)
    at cucumber.runtime.ParameterInfo.convert(ParameterInfo.java:120)
    at cucumber.runtime.StepDefinitionMatch.transformedArgs(StepDefinitionMatch.java:75)
    at cucumber.runtime.StepDefinitionMatch.runStep(StepDefinitionMatch.java:38)
    at cucumber.runtime.Runtime.runStep(Runtime.java:268)
    at cucumber.runtime.model.StepContainer.runStep(StepContainer.java:45)
    at cucumber.runtime.model.StepContainer.runSteps(StepContainer.java:40)
    at cucumber.runtime.model.CucumberScenario.runBackground(CucumberScenario.java:45)
    at cucumber.runtime.model.CucumberScenario.run(CucumberScenario.java:34)
    at cucumber.runtime.junit.ExecutionUnitRunner.run(ExecutionUnitRunner.java:83)
    at cucumber.runtime.junit.FeatureRunner.runChild(FeatureRunner.java:63)
    at cucumber.runtime.junit.FeatureRunner.runChild(FeatureRunner.java:18)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at cucumber.runtime.junit.FeatureRunner.run(FeatureRunner.java:70)
    at cucumber.api.junit.Cucumber.runChild(Cucumber.java:77)
    at cucumber.api.junit.Cucumber.runChild(Cucumber.java:37)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.apache.maven.surefire.junitcore.pc.Scheduler$1.run(Scheduler.java:258)
    at org.apache.maven.surefire.junitcore.pc.InvokerStrategy.schedule(InvokerStrategy.java:38)
    at org.apache.maven.surefire.junitcore.pc.Scheduler.schedule(Scheduler.java:230)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at cucumber.api.junit.Cucumber.run(Cucumber.java:82)
    at org.junit.runners.Suite.runChild(Suite.java:127)
    at org.junit.runners.Suite.runChild(Suite.java:26)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.apache.maven.surefire.junitcore.pc.Scheduler$1.run(Scheduler.java:258)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)

[bjoernmartin]

Seems to duplicate #333

[vsuryawanshi]

Even I have been facing the same issue when I try running a some tests in parallel and its random so its hard to produce a test for it.This PR should help fix it.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.