"java.lang.IllegalStateException: Workspace is closed" with eclipse('4.7.2')

spotless 3.8.0

21:21:13.863 [ERROR] [com.diffplug.spotless.Formatter] Step 'eclipse formatter' found problem in 'src/main/java/com/[...]/config/schema/[FieldSchema.java](https://github.com/diffplug/spotless/files/1650522/FieldSchema.txt)
':
null

java.lang.reflect.InvocationTargetException
        at com.diffplug.spotless.extra.java.EclipseFormatterStep$State.lambda$createFormat$0(EclipseFormatterStep.java:100)
        at com.diffplug.spotless.FormatterStepImpl$Standard.format(FormatterStepImpl.java:78)
        at com.diffplug.spotless.FormatterStep$Strict.format(FormatterStep.java:76)
        at com.diffplug.spotless.Formatter.compute(Formatter.java:230)
        at com.diffplug.spotless.Formatter.isClean(Formatter.java:167)
        at com.diffplug.gradle.spotless.SpotlessTask.check(SpotlessTask.java:263)
        at com.diffplug.gradle.spotless.SpotlessTask.performAction(SpotlessTask.java:205)
        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
        at org.gradle.api.internal.project.taskfactory.IncrementalTaskAction.doExecute(IncrementalTaskAction.java:46)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:39)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:26)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:121)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:110)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:92)
        at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:70)
        at org.gradle.api.internal.tasks.execution.OutputDirectoryCreatingTaskExecuter.execute(OutputDirectoryCreatingTaskExecuter.java:51)
        at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:62)
        at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54)
        at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:60)
        at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:97)
        at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:87)
        at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:52)
        at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
        at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54)
        at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
        at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:34)
        at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker$1.run(DefaultTaskGraphExecuter.java:248)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199)
        at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110)
        at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:241)
        at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:230)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.processTask(DefaultTaskPlanExecutor.java:123)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.access$200(DefaultTaskPlanExecutor.java:79)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:104)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:98)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute(DefaultTaskExecutionPlan.java:626)
        at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.executeWithTask(DefaultTaskExecutionPlan.java:581)
        at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.run(DefaultTaskPlanExecutor.java:98)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
        at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
        at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
Caused by: java.lang.IllegalStateException: Workspace is closed.
        at org.eclipse.core.resources.ResourcesPlugin.getWorkspace(ResourcesPlugin.java:412)
        at org.eclipse.jdt.internal.formatter.DefaultCodeFormatter.createParser(DefaultCodeFormatter.java:332)
        at org.eclipse.jdt.internal.formatter.DefaultCodeFormatter.parseSourceCode(DefaultCodeFormatter.java:317)
        at org.eclipse.jdt.internal.formatter.DefaultCodeFormatter.prepareFormattedCode(DefaultCodeFormatter.java:213)
        at org.eclipse.jdt.internal.formatter.DefaultCodeFormatter.prepareFormattedCode(DefaultCodeFormatter.java:206)
        at org.eclipse.jdt.internal.formatter.CommentsPreparator.formatCode(CommentsPreparator.java:1063)
        at org.eclipse.jdt.internal.formatter.CommentsPreparator.handleFormatCodeTag(CommentsPreparator.java:801)
        at org.eclipse.jdt.internal.formatter.CommentsPreparator.handleHtml(CommentsPreparator.java:665)
        at org.eclipse.jdt.internal.formatter.CommentsPreparator.endVisit(CommentsPreparator.java:621)
        at org.eclipse.jdt.core.dom.TagElement.accept0(TagElement.java:282)
        at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2796)
        at org.eclipse.jdt.core.dom.ASTNode.acceptChildren(ASTNode.java:2867)
        at org.eclipse.jdt.core.dom.Javadoc.accept0(Javadoc.java:205)
        at org.eclipse.jdt.core.dom.ASTNode.accept(ASTNode.java:2796)
        at org.eclipse.jdt.internal.formatter.DefaultCodeFormatter.prepareComments(DefaultCodeFormatter.java:399)
        at org.eclipse.jdt.internal.formatter.DefaultCodeFormatter.prepareFormattedCode(DefaultCodeFormatter.java:222)
        at org.eclipse.jdt.internal.formatter.DefaultCodeFormatter.format(DefaultCodeFormatter.java:177)
        at org.eclipse.jdt.internal.formatter.DefaultCodeFormatter.format(DefaultCodeFormatter.java:160)
        at com.diffplug.gradle.spotless.java.eclipse.EclipseFormatterStepImpl.format(EclipseFormatterStepImpl.java:38)
        ... 47 more

[fvgh]

Problem

The problem is in the JDT code formatter. Due to pre it tries to created a new parser for the Java code within pre tags. The formatter requires a compilation unit (so in the end files). Since JDT now supports Java 9, it also requires a module-info.java. So what JDT now does is an assembly of fake paths. To make up these fakes, it uses the Eclipse work-space. But spotless has/requires no work-space, so the module is not initialized.

Work-Around

The only work-around I see is to set the following properties to FALSE:

• org.eclipse.jdt.core.formatter.comment.format_html
• org.eclipse.jdt.core.formatter.comment.format_source_code

Note that both must be set to false.

Solution

Will provide a fix ASAP, but it will take a while before it'll be available on Maven Central.

[d1ss0nanz]

Setting this to false isn’t a workaround.