Temp workaround: use a single thread to generate native image

[stuartwdouglas]

Workaround for oracle/graal#1927

Should be possible to remove this in 19.3.1

This is a different problem to the previous one that this
fix worked around, however because we were using this setting
we only ran into the thread safety problem after it was removed.

[stuartwdouglas]

@gsmet @gwenneg This should fix the proxy generation problem that is causing intermittent failures until the real Graal fix is available.

[gwenneg]

Great, thanks @stuartwdouglas!

[gwenneg]

I'm not sure the ConcurrentModificationException is fixed as I still see it happening locally. I'll confirm this tonight.

[gwenneg]

I've seen a lot of ConcurrentModificationException during native image generation lately so I'm pretty sure the issue is still there.

[stuartwdouglas]

What does the stack trace look like?

[gwenneg]

Here's one example:

[INFO] [io.quarkus.deployment.pkg.steps.NativeImageBuildStep] Running Quarkus native-image plugin on GraalVM Version 19.3.0 CE
[INFO] [io.quarkus.deployment.pkg.steps.NativeImageBuildStep] /Library/Java/JavaVirtualMachines/graalvm-ce-java11-19.3.0/Contents/Home/bin/native-image -J-Djava.util.logging.manager=org.jboss.logmanager.LogManager -J-DCoordinatorEnvironmentBean.transactionStatusManagerEnable=false -J-Dsun.nio.ch.maxUpdateArraySize=100 -J-Dvertx.logger-delegate-factory-class-name=io.quarkus.vertx.core.runtime.VertxLogDelegateFactory -J-Dvertx.disableDnsResolver=true -J-Dio.netty.leakDetection.level=DISABLED -J-Dio.netty.allocator.maxOrder=1 --initialize-at-build-time= -H:InitialCollectionPolicy=com.oracle.svm.core.genscavenge.CollectionPolicy$BySpaceAndTime -jar quarkus-integration-test-jpa-mysql-999-SNAPSHOT-runner.jar -J-Djava.util.concurrent.ForkJoinPool.common.parallelism=1 -H:FallbackThreshold=0 -H:+ReportExceptionStackTraces -H:+AddAllCharsets -H:+IncludeAllTimeZones -H:EnableURLProtocols=http,https --enable-all-security-services -H:+JNI --no-server -H:-UseServiceLoaderFeature -H:+StackTrace quarkus-integration-test-jpa-mysql-999-SNAPSHOT-runner
[quarkus-integration-test-jpa-mysql-999-SNAPSHOT-runner:25615]    classlist:  26,222.42 ms
[quarkus-integration-test-jpa-mysql-999-SNAPSHOT-runner:25615]        (cap):   4,739.72 ms
[quarkus-integration-test-jpa-mysql-999-SNAPSHOT-runner:25615]        setup:   9,611.33 ms
23:31:12,042 INFO  [org.hib.Version] HHH000412: Hibernate Core {5.4.10.Final}
23:31:12,096 INFO  [org.hib.ann.com.Version] HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
23:31:12,167 INFO  [org.hib.dia.Dialect] HHH000400: Using dialect: org.hibernate.dialect.MySQL8Dialect
23:31:16,508 INFO  [org.jbo.threads] JBoss Threads version 3.0.0.Final
[quarkus-integration-test-jpa-mysql-999-SNAPSHOT-runner:25615]     analysis:  36,124.60 ms
Fatal error: com.oracle.graal.pointsto.util.AnalysisError$ParsingError: Error encountered while parsing com.mysql.cj.jdbc.ha.FailoverConnectionProxy.createProxyInstance(com.mysql.cj.conf.ConnectionUrl) 
Parsing context:
	parsing com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:205)
	parsing io.agroal.pool.ConnectionFactory.createConnection(ConnectionFactory.java:200)
	parsing io.agroal.pool.ConnectionPool$CreateConnectionTask.call(ConnectionPool.java:390)
	parsing io.agroal.pool.ConnectionPool$CreateConnectionTask.call(ConnectionPool.java:372)
	parsing java.util.concurrent.FutureTask.run(FutureTask.java:264)
	parsing com.oracle.svm.core.jdk.RuntimeSupport.executeHooks(RuntimeSupport.java:144)
	parsing com.oracle.svm.core.jdk.RuntimeSupport.executeTearDownHooks(RuntimeSupport.java:121)
	parsing com.oracle.svm.core.graal.snippets.CEntryPointSnippets.tearDownIsolate(CEntryPointSnippets.java:361)

	at com.oracle.graal.pointsto.util.AnalysisError.parsingError(AnalysisError.java:138)
	at com.oracle.graal.pointsto.flow.MethodTypeFlow.doParse(MethodTypeFlow.java:323)
	at com.oracle.graal.pointsto.flow.MethodTypeFlow.ensureParsed(MethodTypeFlow.java:300)
	at com.oracle.graal.pointsto.flow.MethodTypeFlow.addContext(MethodTypeFlow.java:107)
	at com.oracle.graal.pointsto.flow.StaticInvokeTypeFlow.update(InvokeTypeFlow.java:346)
	at com.oracle.graal.pointsto.BigBang$2.run(BigBang.java:511)
	at com.oracle.graal.pointsto.util.CompletionExecutor.lambda$execute$0(CompletionExecutor.java:171)
	at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1426)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)
Caused by: org.graalvm.compiler.java.BytecodeParser$BytecodeParserError: java.util.ConcurrentModificationException
	at parsing com.mysql.cj.jdbc.ha.FailoverConnectionProxy.createProxyInstance(FailoverConnectionProxy.java:112)
	at jdk.internal.vm.compiler/org.graalvm.compiler.java.BytecodeParser.throwParserError(BytecodeParser.java:2475)
	at com.oracle.svm.hosted.phases.SharedGraphBuilderPhase$SharedBytecodeParser.throwParserError(SharedGraphBuilderPhase.java:93)
	at jdk.internal.vm.compiler/org.graalvm.compiler.java.BytecodeParser.iterateBytecodesForBlock(BytecodeParser.java:3291)
	at jdk.internal.vm.compiler/org.graalvm.compiler.java.BytecodeParser.processBlock(BytecodeParser.java:3093)
	at jdk.internal.vm.compiler/org.graalvm.compiler.java.BytecodeParser.build(BytecodeParser.java:977)
	at jdk.internal.vm.compiler/org.graalvm.compiler.java.BytecodeParser.buildRootMethod(BytecodeParser.java:871)
	at jdk.internal.vm.compiler/org.graalvm.compiler.java.GraphBuilderPhase$Instance.run(GraphBuilderPhase.java:84)
	at jdk.internal.vm.compiler/org.graalvm.compiler.phases.Phase.run(Phase.java:49)
	at jdk.internal.vm.compiler/org.graalvm.compiler.phases.BasePhase.apply(BasePhase.java:197)
	at jdk.internal.vm.compiler/org.graalvm.compiler.phases.Phase.apply(Phase.java:42)
	at jdk.internal.vm.compiler/org.graalvm.compiler.phases.Phase.apply(Phase.java:38)
	at com.oracle.graal.pointsto.flow.MethodTypeFlowBuilder.parse(MethodTypeFlowBuilder.java:221)
	at com.oracle.graal.pointsto.flow.MethodTypeFlowBuilder.apply(MethodTypeFlowBuilder.java:340)
	at com.oracle.graal.pointsto.flow.MethodTypeFlow.doParse(MethodTypeFlow.java:310)
	... 11 more
Caused by: java.util.ConcurrentModificationException
	at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134)
	at com.oracle.svm.reflect.proxy.DynamicProxySupport.addProxyClass(DynamicProxySupport.java:94)
	at com.oracle.svm.hosted.snippets.SubstrateGraphBuilderPlugins.interceptProxyInterfaces(SubstrateGraphBuilderPlugins.java:246)
	at com.oracle.svm.hosted.snippets.SubstrateGraphBuilderPlugins.access$000(SubstrateGraphBuilderPlugins.java:149)
	at com.oracle.svm.hosted.snippets.SubstrateGraphBuilderPlugins$6.apply(SubstrateGraphBuilderPlugins.java:230)
	at jdk.internal.vm.compiler/org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin.execute(InvocationPlugin.java:217)
	at jdk.internal.vm.compiler/org.graalvm.compiler.java.BytecodeParser.tryInvocationPlugin(BytecodeParser.java:2097)
	at com.oracle.svm.hosted.phases.AnalysisGraphBuilderPhase$AnalysisBytecodeParser.tryInvocationPlugin(AnalysisGraphBuilderPhase.java:67)
	at jdk.internal.vm.compiler/org.graalvm.compiler.java.BytecodeParser.appendInvoke(BytecodeParser.java:1806)
	at jdk.internal.vm.compiler/org.graalvm.compiler.java.BytecodeParser.genInvokeStatic(BytecodeParser.java:1571)
	at jdk.internal.vm.compiler/org.graalvm.compiler.java.BytecodeParser.genInvokeStatic(BytecodeParser.java:1551)
	at jdk.internal.vm.compiler/org.graalvm.compiler.java.BytecodeParser.processBytecode(BytecodeParser.java:5170)
	at jdk.internal.vm.compiler/org.graalvm.compiler.java.BytecodeParser.iterateBytecodesForBlock(BytecodeParser.java:3286)
	... 22 more
Error: Image build request failed with exit status 1