Might be reproducible after several tries

java.lang.IllegalStateException: zip file closed
at java.util.zip.ZipFile.ensureOpen(ZipFile.java:415)
at java.util.zip.ZipFile.getEntry(ZipFile.java:160)
at java.util.jar.JarFile.getEntry(JarFile.java:208)
at java.util.jar.JarFile.getJarEntry(JarFile.java:191)
at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:757)
at sun.misc.URLClassPath.getResource(URLClassPath.java:169)
at java.net.URLClassLoader$1.run(URLClassLoader.java:194)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at org.hibernate.console.ConsoleConfiguration$2$1.findClass(ConsoleConfiguration.java:199)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at org.hibernate.console.ConsoleConfiguration$2$1.loadClass(ConsoleConfiguration.java:207)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at org.hibernate.console.ConsoleConfiguration$2$1.loadClass(ConsoleConfiguration.java:215)
at org.hsqldb.jdbcDriver.getConnection(Unknown Source)
at org.hsqldb.jdbcDriver.connect(Unknown Source)
at org.hibernate.eclipse.libs.FakeDelegatingDriver.connect(FakeDelegatingDriver.java:40)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:154)
at org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:133)
at org.hibernate.cfg.reveng.dialect.AbstractMetaDataDialect.getConnection(AbstractMetaDataDialect.java:121)
at org.hibernate.cfg.reveng.dialect.AbstractMetaDataDialect.getMetaData(AbstractMetaDataDialect.java:60)
at org.hibernate.cfg.reveng.dialect.AbstractMetaDataDialect.caseForSearch(AbstractMetaDataDialect.java:163)
at org.hibernate.cfg.reveng.dialect.JDBCMetaDataDialect.getTables(JDBCMetaDataDialect.java:22)
at org.hibernate.cfg.reveng.JDBCReader.processTables(JDBCReader.java:476)
at org.hibernate.cfg.reveng.JDBCReader.readDatabaseSchema(JDBCReader.java:74)
at org.hibernate.eclipse.console.workbench.LazyDatabaseSchemaWorkbenchAdapter$2.execute(LazyDatabaseSchemaWorkbenchAdapter.java:126)
at org.hibernate.console.execution.DefaultExecutionContext.execute(DefaultExecutionContext.java:63)
at org.hibernate.console.ConsoleConfiguration.execute(ConsoleConfiguration.java:107)
at org.hibernate.eclipse.console.workbench.LazyDatabaseSchemaWorkbenchAdapter.readDatabaseSchema(LazyDatabaseSchemaWorkbenchAdapter.java:115)
at org.hibernate.eclipse.console.workbench.LazyDatabaseSchemaWorkbenchAdapter.getChildren(LazyDatabaseSchemaWorkbenchAdapter.java:65)
at org.hibernate.eclipse.console.workbench.BasicWorkbenchAdapter.fetchDeferredChildren(BasicWorkbenchAdapter.java:106)
at org.eclipse.ui.progress.DeferredTreeContentManager$1.run(DeferredTreeContentManager.java:235)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)