Description of problem:
Package portlet-2.0-api fails to build from source in EPEL 7.

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-javadoc-plugin:2.9:aggregate (default-cli) on project portlet-api_2.0_spec: An error has occurred in JavaDocs report generation:
[ERROR] Exit code: 1 - /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:192: error: semicolon missing
[ERROR] * valid XML characters, i.e. &lt, &gt, &amp, &#039, &#034 will get converted
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:192: error: semicolon missing
[ERROR] * valid XML characters, i.e. &lt, &gt, &amp, &#039, &#034 will get converted
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:192: error: semicolon missing
[ERROR] * valid XML characters, i.e. &lt, &gt, &amp, &#039, &#034 will get converted
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:192: error: semicolon missing
[ERROR] * valid XML characters, i.e. &lt, &gt, &amp, &#039, &#034 will get converted
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:192: error: semicolon missing
[ERROR] * valid XML characters, i.e. &lt, &gt, &amp, &#039, &#034 will get converted
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:193: error: semicolon missing
[ERROR] * into their corresponding character entity codes (&lt to &&lt, &gt to &&gt,
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:193: error: bad HTML entity
[ERROR] * into their corresponding character entity codes (&lt to &&lt, &gt to &&gt,
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:193: error: semicolon missing
[ERROR] * into their corresponding character entity codes (&lt to &&lt, &gt to &&gt,
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:193: error: semicolon missing
[ERROR] * into their corresponding character entity codes (&lt to &&lt, &gt to &&gt,
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:193: error: bad HTML entity
[ERROR] * into their corresponding character entity codes (&lt to &&lt, &gt to &&gt,
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:193: error: semicolon missing
[ERROR] * into their corresponding character entity codes (&lt to &&lt, &gt to &&gt,
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:194: error: semicolon missing
[ERROR] * &amp to &&amp, &#039 to &&#039, &#034 to &&#034).
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:194: error: bad HTML entity
[ERROR] * &amp to &&amp, &#039 to &&#039, &#034 to &&#034).
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:194: error: semicolon missing
[ERROR] * &amp to &&amp, &#039 to &&#039, &#034 to &&#034).
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:194: error: semicolon missing
[ERROR] * &amp to &&amp, &#039 to &&#039, &#034 to &&#034).
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:194: error: bad HTML entity
[ERROR] * &amp to &&amp, &#039 to &&#039, &#034 to &&#034).
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:194: error: semicolon missing
[ERROR] * &amp to &&amp, &#039 to &&#039, &#034 to &&#034).
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:194: error: semicolon missing
[ERROR] * &amp to &&amp, &#039 to &&#039, &#034 to &&#034).
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:194: error: bad HTML entity
[ERROR] * &amp to &&amp, &#039 to &&#039, &#034 to &&#034).
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/BaseURL.java:194: error: semicolon missing
[ERROR] * &amp to &&amp, &#039 to &&#039, &#034 to &&#034).
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/CacheControl.java:40: warning: nested tag not allowed: <code>
[ERROR] * with the <code>expiration-cache<code> tag is returned,
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/CacheControl.java:41: warning: nested tag not allowed: <code>
[ERROR] * or <code>0</code> if no default is defined.
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/CacheControl.java:42: error: block element not allowed within inline element <code>: p
[ERROR] * <p>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/CacheControl.java:44: warning: nested tag not allowed: <code>
[ERROR] * <code>getProperty(EXPIRATION_CACHE)</code>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/CacheControl.java:48: warning: nested tag not allowed: <code>
[ERROR] *          or <code>0</code> if no expiration time
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/CacheControl.java:40: error: element not closed: code
[ERROR] * with the <code>expiration-cache<code> tag is returned,
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/CacheControl.java:40: error: element not closed: code
[ERROR] * with the <code>expiration-cache<code> tag is returned,
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/CacheControl.java:108: error: unknown tag: null
[ERROR] * used as validation tag, or <code>null</null>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/CacheControl.java:110: error: block element not allowed within inline element <code>: p
[ERROR] * <p>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/CacheControl.java:112: warning: nested tag not allowed: <code>
[ERROR] * <code>getProperty(ETAG)</code>.
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/CacheControl.java:115: warning: nested tag not allowed: <code>
[ERROR] *          used as validation tag, or <code>null</null>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/CacheControl.java:115: error: unknown tag: null
[ERROR] *          used as validation tag, or <code>null</null>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/CacheControl.java:115: error: element not closed: code
[ERROR] *          used as validation tag, or <code>null</null>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/CacheControl.java:108: error: element not closed: code
[ERROR] * used as validation tag, or <code>null</null>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:159: error: unknown tag: name
[ERROR] * annotated with <code>@ProcessAction</name> that matches the action parameter
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:160: warning: nested tag not allowed: <code>
[ERROR] * value <code>ActionRequest.ACTION_NAME</code> or, if no
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:161: warning: nested tag not allowed: <code>
[ERROR] * such method is found throws a <code>PortletException</code>.<br>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:163: warning: nested tag not allowed: <code>
[ERROR] * to be allowed to be called by <code>GenericPortlet</code>.
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:159: error: element not closed: code
[ERROR] * annotated with <code>@ProcessAction</name> that matches the action parameter
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:276: warning: no @param for request
[ERROR] protected java.lang.String getTitle(RenderRequest request) {
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:287: error: unknown tag: name
[ERROR] * <li>method annotated with <code>@RenderMode</name> and the name of the
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:287: error: end tag missing: </code>
[ERROR] * <li>method annotated with <code>@RenderMode</name> and the name of the
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:297: error: unexpected end tag: </ul>
[ERROR] * </ul>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:298: error: tag not allowed here: <P>
[ERROR] * <P>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:301: error: tag not allowed here: <p>
[ERROR] * <p>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:286: error: element not closed: ol
[ERROR] * <ol>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:616: error: unknown tag: name
[ERROR] * annotated with <code>@ProcessEvent</name> that matches the
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:621: warning: nested tag not allowed: <code>
[ERROR] * to be allowed to be called by <code>GenericPortlet</code>.
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:616: error: element not closed: code
[ERROR] * annotated with <code>@ProcessEvent</name> that matches the
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:689: warning: no @param for request
[ERROR] protected java.util.Collection<PortletMode> getNextPossiblePortletModes(RenderRequest request) {
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/GenericPortlet.java:689: warning: no @return
[ERROR] protected java.util.Collection<PortletMode> getNextPossiblePortletModes(RenderRequest request) {
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:62: warning: nested tag not allowed: <code>
[ERROR] * with the <code>cache-scope<code> tag, otherwise it is <code>PRIVATE_SCOPE</code>.
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:62: warning: nested tag not allowed: <code>
[ERROR] * with the <code>cache-scope<code> tag, otherwise it is <code>PRIVATE_SCOPE</code>.
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:63: error: block element not allowed within inline element <code>: p
[ERROR] * <p>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:64: warning: nested tag not allowed: <code>
[ERROR] * Values that are not either <code>PUBLIC_SCOPE</code> or <code>PRIVATE_SCOPE</code>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:64: warning: nested tag not allowed: <code>
[ERROR] * Values that are not either <code>PUBLIC_SCOPE</code> or <code>PRIVATE_SCOPE</code>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:65: warning: nested tag not allowed: <code>
[ERROR] * are treated as <code>PRIVATE_SCOPE</code>.
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:66: error: tag not allowed here: <p>
[ERROR] * <p>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:67: warning: nested tag not allowed: <code>
[ERROR] * The value is <code>"portlet.cache-scope"</code>.
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:62: error: element not closed: code
[ERROR] * with the <code>cache-scope<code> tag, otherwise it is <code>PRIVATE_SCOPE</code>.
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:62: error: element not closed: code
[ERROR] * with the <code>cache-scope<code> tag, otherwise it is <code>PRIVATE_SCOPE</code>.
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:44: warning: nested tag not allowed: <code>
[ERROR] * with the <code>expiration-cache<code> tag, otherwise it is <code>0</code>.
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:44: warning: nested tag not allowed: <code>
[ERROR] * with the <code>expiration-cache<code> tag, otherwise it is <code>0</code>.
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:45: error: block element not allowed within inline element <code>: p
[ERROR] * <p>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:46: warning: nested tag not allowed: <code>
[ERROR] * Non-integer values are treated as <code>0</code>.
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:47: error: tag not allowed here: <p>
[ERROR] * <p>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:48: warning: nested tag not allowed: <code>
[ERROR] * The value is <code>"portlet.expiration-cache"</code>.
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:44: error: element not closed: code
[ERROR] * with the <code>expiration-cache<code> tag, otherwise it is <code>0</code>.
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/MimeResponse.java:44: error: element not closed: code
[ERROR] * with the <code>expiration-cache<code> tag, otherwise it is <code>0</code>.
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/package-info.java:42: warning: empty <p> tag
[ERROR] * <p>
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/PortletPreferences.java:83: warning: no @param for key
[ERROR] public boolean isReadOnly(String key);
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/PortletSecurityException.java:59: error: unknown tag: il
[ERROR] * <il>throw an exception
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/PortletSecurityException.java:59: error: text not allowed in <ul> element
[ERROR] * <il>throw an exception
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/ReadOnlyException.java:57: error: unknown tag: il
[ERROR] * <il>throw an exception
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/ReadOnlyException.java:57: error: text not allowed in <ul> element
[ERROR] * <il>throw an exception
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/WindowStateException.java:59: error: unknown tag: il
[ERROR] * <il>throw an exception
[ERROR] ^
[ERROR] /builddir/build/BUILD/portlet-2.0-api-1.0/src/main/java/javax/portlet/WindowStateException.java:59: error: text not allowed in <ul> element
[ERROR] * <il>throw an exception
[ERROR] ^
[ERROR] 
[ERROR] Command line was: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.121-0.b13.el7_3.x86_64/jre/../bin/javadoc @options @packages
[ERROR] 
[ERROR] Refer to the generated Javadoc files in '/builddir/build/BUILD/portlet-2.0-api-1.0/target/site/apidocs' dir.
[ERROR] -> [Help 1]

Version-Release number of selected component (if applicable):
1.0-9.el7

Steps to Reproduce:
koji build --scratch epel7 portlet-2.0-api-1.0-9.el7.src.rpm

Additional info:
This package is tracked by Koschei. See:
http://apps.fedoraproject.org/koschei/package/portlet-2.0-api