Fix Local Smoke Tests by Allowing ScriptSessionCacheInit's mkdir to Race in Parallel Tests

[nbauernfeind]

Turns out that NoConsoleSessionModule is used in the testing context and if we simply do not require the ScriptSessionCacheInit then it no longer fails. I've left a few null checks in tearDown that fix cascading failures when setUp throws an exception in a super class.

[rcaudy]

This feels like we're working around the fact that our processes expect exclusive ownership of their "cache" directory.

[devinrsmith]

I'm getting this too, which ultimately causes teardown NPEs.

Failed to create class cache directory /tmp/deephaven/cache/script-session-classes
io.deephaven.UncheckedDeephavenException: Failed to create class cache directory /tmp/deephaven/cache/script-session-classes
	at io.deephaven.engine.util.AbstractScriptSession.createOrClearDirectory(AbstractScriptSession.java:63)
	at io.deephaven.engine.util.AbstractScriptSession.createScriptCache(AbstractScriptSession.java:54)
	at io.deephaven.server.console.ScriptSessionCacheInit.<init>(ScriptSessionCacheInit.java:17)
	at io.deephaven.server.console.ConsoleModule.bindScriptSessionCacheInit(ConsoleModule.java:32)
	at io.deephaven.server.console.ConsoleModule_BindScriptSessionCacheInitFactory.bindScriptSessionCacheInit(ConsoleModule_BindScriptSessionCacheInitFactory.java:32)
	at io.deephaven.server.console.ConsoleModule_BindScriptSessionCacheInitFactory.get(ConsoleModule_BindScriptSessionCacheInitFactory.java:24)
	at io.deephaven.server.console.ConsoleModule_BindScriptSessionCacheInitFactory.get(ConsoleModule_BindScriptSessionCacheInitFactory.java:10)
	at dagger.internal.DoubleCheck.get(DoubleCheck.java:47)
	at io.deephaven.server.console.NoConsoleSessionModule_BindNoLanguageSessionFactory.get(NoConsoleSessionModule_BindNoLanguageSessionFactory.java:46)
	at io.deephaven.server.console.NoConsoleSessionModule_BindNoLanguageSessionFactory.get(NoConsoleSessionModule_BindNoLanguageSessionFactory.java:14)
	at io.deephaven.server.console.NoConsoleSessionModule_BindScriptSessionFactory.get(NoConsoleSessionModule_BindScriptSessionFactory.java:37)
	at io.deephaven.server.console.NoConsoleSessionModule_BindScriptSessionFactory.get(NoConsoleSessionModule_BindScriptSessionFactory.java:13)
	at io.deephaven.server.session.ScriptSessionModule.provideScriptSession(ScriptSessionModule.java:31)
	at io.deephaven.server.session.ScriptSessionModule_ProvideScriptSessionFactory.provideScriptSession(ScriptSessionModule_ProvideScriptSessionFactory.java:44)
	at io.deephaven.server.session.ScriptSessionModule_ProvideScriptSessionFactory.get(ScriptSessionModule_ProvideScriptSessionFactory.java:34)
	at io.deephaven.server.session.ScriptSessionModule_ProvideScriptSessionFactory.get(ScriptSessionModule_ProvideScriptSessionFactory.java:13)
	at dagger.internal.DoubleCheck.get(DoubleCheck.java:47)
	at io.deephaven.server.appmode.ApplicationInjector.loadApplicationFactory(ApplicationInjector.java:101)
	at io.deephaven.server.appmode.ApplicationInjector.run(ApplicationInjector.java:48)
	at io.deephaven.server.runner.DeephavenApiServer.startForUnitTests(DeephavenApiServer.java:242)
	at io.deephaven.server.runner.DeephavenApiServerTestBase.setUp(DeephavenApiServerTestBase.java:139)
	at io.deephaven.client.DeephavenSessionTestBase.setUp(DeephavenSessionTestBase.java:28)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
	at org.junit.internal.runners.statements.RunBefores.invokeMethod(RunBefores.java:33)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
	at io.grpc.testing.GrpcCleanupRule$1.evaluate(GrpcCleanupRule.java:153)
	at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:54)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
	at org.junit.runners.Suite.runChild(Suite.java:128)
	at org.junit.runners.Suite.runChild(Suite.java:27)
	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:112)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
	at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:40)
	at org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:60)
	at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:52)
	at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
	at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
	at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
	at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
	at jdk.proxy1/jdk.proxy1.$Proxy2.processTestClass(Unknown Source)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker$2.run(TestWorker.java:176)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100)
	at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60)
	at org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56)
	at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:113)
	at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:65)
	at worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69)
	at worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74)

I'm able to workaround it right now by setting --max-workers 1, but that's not a very satisfying solution.