--- old/src/java.xml.bind/share/classes/javax/xml/bind/JAXBContextFactory.java	2017-05-03 18:05:15.655096015 +0300
+++ new/src/java.xml.bind/share/classes/javax/xml/bind/JAXBContextFactory.java	2017-05-03 18:05:15.547096018 +0300
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -44,7 +44,9 @@
      * For semantics see {@link javax.xml.bind.JAXBContext#newInstance(Class[], java.util.Map)}
      *
      * @param classesToBeBound
-     *      list of java classes to be recognized by the new {@link JAXBContext}.
+     *      List of java classes to be recognized by the new {@link JAXBContext}.
+     *      Classes in {@code classesToBeBound} that are in named modules must be in a package
+     *      that is {@linkplain java.lang.reflect.Module#isOpen open} to at least the {@code java.xml.bind} module.
      *      Can be empty, in which case a {@link JAXBContext} that only knows about
      *      spec-defined classes will be returned.
      * @param properties
@@ -56,7 +58,16 @@
      *
      * @throws JAXBException
      *      if an error was encountered while creating the
-     *      {@code JAXBContext}. See {@link JAXBContext#newInstance(Class[], Map)} for details.
+     *      {@code JAXBContext}, such as (but not limited to):
+     * <ol>
+     *  <li>No JAXB implementation was discovered
+     *  <li>Classes use JAXB annotations incorrectly
+     *  <li>Classes have colliding annotations (i.e., two classes with the same type name)
+     *  <li>The JAXB implementation was unable to locate
+     *      provider-specific out-of-band information (such as additional
+     *      files generated at the development time.)
+     *  <li>{@code classesToBeBound} are not open to {@code java.xml.bind} module
+     * </ol>
      *
      * @throws IllegalArgumentException
      *      if the parameter contains {@code null} (i.e., {@code newInstance(null,someMap);})
@@ -77,7 +88,10 @@
      * The interpretation of properties is up to implementations. Implementations must
      * throw {@code JAXBException} if it finds properties that it doesn't understand.
      *
-     * @param contextPath list of java package names that contain schema derived classes
+     * @param contextPath
+     *      List of java package names that contain schema derived classes.
+     *      Classes in {@code classesToBeBound} that are in named modules must be in a package
+     *      that is {@linkplain java.lang.reflect.Module#isOpen open} to at least the {@code java.xml.bind} module.
      * @param classLoader
      *      This class loader will be used to locate the implementation classes.
      * @param properties
@@ -86,7 +100,14 @@
      *
      * @return a new instance of a {@code JAXBContext}
      * @throws JAXBException if an error was encountered while creating the
-     *      {@code JAXBContext}. See {@link JAXBContext#newInstance(String, ClassLoader, Map)} for details.
+     *                       {@code JAXBContext} such as
+     * <ol>
+     *   <li>failure to locate either ObjectFactory.class or jaxb.index in the packages</li>
+     *   <li>an ambiguity among global elements contained in the contextPath</li>
+     *   <li>failure to locate a value for the context factory provider property</li>
+     *   <li>mixing schema derived packages from different providers on the same contextPath</li>
+     *   <li>packages are not open to {@code java.xml.bind} module</li>
+     * </ol>
      *
      * @since 9, JAXB 2.3
      */