This exception started on Jake builds between 1/8 and 1/11/2016.
The application is calling into Javadoc API's.
java.nio.file.ClosedFileSystemException
    at jdk.nio.zipfs.ZipFileSystem.ensureOpen(jdk.zipfs@9-internal/ZipFileSystem.java:1104)
    at jdk.nio.zipfs.ZipFileSystem.newInputStream(jdk.zipfs@9-internal/ZipFileSystem.java:552)
    at jdk.nio.zipfs.ZipPath.newInputStream(jdk.zipfs@9-internal/ZipPath.java:630)
    at jdk.nio.zipfs.ZipFileSystemProvider.newInputStream(jdk.zipfs@9-internal/ZipFileSystemProvider.java:266)
    at java.nio.file.Files.newInputStream(java.base@9-internal/Files.java:152)
    at com.sun.tools.javac.file.PathFileObject.openInputStream(jdk.compiler@9-internal/PathFileObject.java:435)
    at com.sun.tools.javac.jvm.ClassReader.readClassFile(jdk.compiler@9-internal/ClassReader.java:2526)
    at com.sun.tools.javac.code.ClassFinder.fillIn(jdk.compiler@9-internal/ClassFinder.java:358)
    at com.sun.tools.javac.code.ClassFinder.complete(jdk.compiler@9-internal/ClassFinder.java:295)
    at com.sun.tools.javac.code.ClassFinder.access$000(jdk.compiler@9-internal/ClassFinder.java:75)
    at com.sun.tools.javac.code.ClassFinder$1.complete(jdk.compiler@9-internal/ClassFinder.java:171)
    at com.sun.tools.javac.code.Symbol.complete(jdk.compiler@9-internal/Symbol.java:601)
    at com.sun.tools.javac.code.Symbol$ClassSymbol.complete(jdk.compiler@9-internal/Symbol.java:1222)
    at com.sun.tools.javac.code.Symbol$ClassSymbol.flags(jdk.compiler@9-internal/Symbol.java:1156)
    at com.sun.tools.javadoc.ClassDocImpl.getFlags(jdk.javadoc@9-internal/ClassDocImpl.java:130)
    at com.sun.tools.javadoc.ClassDocImpl.isAnnotationType(jdk.javadoc@9-internal/ClassDocImpl.java:144)
    at com.sun.tools.javadoc.DocEnv.isAnnotationType(jdk.javadoc@9-internal/DocEnv.java:623)
    at com.sun.tools.javadoc.DocEnv.getClassDoc(jdk.javadoc@9-internal/DocEnv.java:596)
    at com.sun.tools.javadoc.DocEnv.lookupClass(jdk.javadoc@9-internal/DocEnv.java:179)
    at com.sun.tools.javadoc.RootDocImpl.classNamed(jdk.javadoc@9-internal/RootDocImpl.java:218) <<================
    at com.bea.util.jam.internal.javadoc.JavadocClassBuilder.build(JavadocClassBuilder.java:107) <<================