Exporting a page to HTML dies with the following exception:

com.atlassian.confluence.importexport.ImportExportException: java.io.IOException: Stream closed at com.atlassian.confluence.importexport.impl.HtmlExporter.doExportEntity(HtmlExporter.java:212) at com.atlassian.confluence.importexport.impl.AbstractRendererExporterImpl.exportPage(AbstractRendererExporterImpl.java:143) at com.atlassian.confluence.importexport.impl.AbstractRendererExporterImpl.doExport(AbstractRendererExporterImpl.java:109) at com.atlassian.confluence.importexport.impl.HtmlExporter.doExport(HtmlExporter.java:43) at com.atlassian.confluence.importexport.DefaultImportExportManager.exportAs(DefaultImportExportManager.java:75) at

which has a nested exception of:

java.io.IOException: Stream closed at java.io.BufferedInputStream.ensureOpen(BufferedInputStream.java:120) at java.io.BufferedInputStream.read(BufferedInputStream.java:199) at com.atlassian.confluence.util.FileUtils.copyFile(FileUtils.java:67) at com.atlassian.confluence.importexport.impl.HtmlExporter.doExportEntity(HtmlExporter.java:208) ... 65 more