HADOOP-10134 [JDK8] Fix Javadoc errors caused by incorrect or illegal tags in doc comments.

(cherry picked from commit 2bc3f1064f5a5eea1c6b384f68b2d1c2fb427e8f)

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/client/AuthenticatedURL.java

@@ -24,19 +24,18 @@ import java.util.Map;
 /**
  * The {@link AuthenticatedURL} class enables the use of the JDK {@link URL} class
  * against HTTP endpoints protected with the {@link AuthenticationFilter}.
- * <p/>
+ * <p>
  * The authentication mechanisms supported by default are Hadoop Simple  authentication
  * (also known as pseudo authentication) and Kerberos SPNEGO authentication.
- * <p/>
+ * <p>
  * Additional authentication mechanisms can be supported via {@link Authenticator} implementations.
- * <p/>
+ * <p>
  * The default {@link Authenticator} is the {@link KerberosAuthenticator} class which supports
  * automatic fallback from Kerberos SPNEGO to Hadoop Simple authentication.
- * <p/>
+ * <p>
  * <code>AuthenticatedURL</code> instances are not thread-safe.
- * <p/>
+ * <p>
  * The usage pattern of the {@link AuthenticatedURL} is:
- * <p/>
  * <pre>
  *
  * // establishing an initial connection
@@ -240,7 +239,7 @@ public class AuthenticatedURL {
 
   /**
    * Helper method that extracts an authentication token received from a connection.
-   * <p/>
+   * <p>
    * This method is used by {@link Authenticator} implementations.
    *
    * @param conn connection to extract the authentication token from.

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/client/Authenticator.java

@@ -19,7 +19,7 @@ import java.net.URL;
 
 /**
  * Interface for client authentication mechanisms.
- * <p/>
+ * <p>
  * Implementations are use-once instances, they don't need to be thread safe.
  */
 public interface Authenticator {

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/client/KerberosAuthenticator.java

@@ -41,9 +41,9 @@ import static org.apache.hadoop.util.PlatformName.IBM_JAVA;
 
 /**
  * The {@link KerberosAuthenticator} implements the Kerberos SPNEGO authentication sequence.
- * <p/>
+ * <p>
  * It uses the default principal for the Kerberos cache (normally set via kinit).
- * <p/>
+ * <p>
  * It falls back to the {@link PseudoAuthenticator} if the HTTP endpoint does not trigger an SPNEGO authentication
  * sequence.
  */
@@ -160,9 +160,9 @@ public class KerberosAuthenticator implements Authenticator {
 
   /**
    * Performs SPNEGO authentication against the specified URL.
-   * <p/>
+   * <p>
    * If a token is given it does a NOP and returns the given token.
-   * <p/>
+   * <p>
    * If no token is given, it will perform the SPNEGO authentication sequence using an
    * HTTP <code>OPTIONS</code> request.
    *
@@ -209,7 +209,7 @@ public class KerberosAuthenticator implements Authenticator {
 
   /**
    * If the specified URL does not support SPNEGO authentication, a fallback {@link Authenticator} will be used.
-   * <p/>
+   * <p>
    * This implementation returns a {@link PseudoAuthenticator}.
    *
    * @return the fallback {@link Authenticator}.

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/client/PseudoAuthenticator.java

@@ -20,7 +20,7 @@ import java.net.URL;
 /**
  * The {@link PseudoAuthenticator} implementation provides an authentication equivalent to Hadoop's
  * Simple authentication, it trusts the value of the 'user.name' Java System property.
- * <p/>
+ * <p>
  * The 'user.name' value is propagated using an additional query string parameter {@link #USER_NAME} ('user.name').
  */
 public class PseudoAuthenticator implements Authenticator {
@@ -47,13 +47,13 @@ public class PseudoAuthenticator implements Authenticator {
 
   /**
    * Performs simple authentication against the specified URL.
-   * <p/>
+   * <p>
    * If a token is given it does a NOP and returns the given token.
-   * <p/>
+   * <p>
    * If no token is given, it will perform an HTTP <code>OPTIONS</code> request injecting an additional
    * parameter {@link #USER_NAME} in the query string with the value returned by the {@link #getUserName()}
    * method.
-   * <p/>
+   * <p>
    * If the response is successful it will update the authentication token.
    *
    * @param url the URl to authenticate against.
@@ -79,7 +79,7 @@ public class PseudoAuthenticator implements Authenticator {
 
   /**
    * Returns the current user name.
-   * <p/>
+   * <p>
    * This implementation returns the value of the Java system property 'user.name'
    *
    * @return the current user name.

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/server/AltKerberosAuthenticationHandler.java

@@ -28,7 +28,6 @@ import org.apache.hadoop.security.authentication.client.AuthenticationException;
  * to allow a developer to implement their own custom authentication for browser
  * access.  The alternateAuthenticate method will be called whenever a request
  * comes from a browser.
- * <p/>
  */
 public abstract class AltKerberosAuthenticationHandler
                         extends KerberosAuthenticationHandler {
@@ -52,7 +51,6 @@ public abstract class AltKerberosAuthenticationHandler
   /**
    * Returns the authentication type of the authentication handler,
    * 'alt-kerberos'.
-   * <p/>
    *
    * @return the authentication type of the authentication handler,
    * 'alt-kerberos'.
@@ -80,7 +78,6 @@ public abstract class AltKerberosAuthenticationHandler
    * completed successfully (in the case of Java access) and only after the
    * custom authentication implemented by the subclass in alternateAuthenticate
    * has completed successfully (in the case of browser access).
-   * <p/>
    *
    * @param request the HTTP client request.
    * @param response the HTTP client response.
@@ -109,7 +106,7 @@ public abstract class AltKerberosAuthenticationHandler
    * refers to a browser.  If its not a browser, then Kerberos authentication
    * will be used; if it is a browser, alternateAuthenticate from the subclass
    * will be used.
-   * <p/>
+   * <p>
    * A User-Agent String is considered to be a browser if it does not contain
    * any of the values from alt-kerberos.non-browser.user-agents; the default
    * behavior is to consider everything a browser unless it contains one of:

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/server/AuthenticationFilter.java

@@ -42,18 +42,20 @@ import java.text.SimpleDateFormat;
 import java.util.*;
 
 /**
- * The {@link AuthenticationFilter} enables protecting web application resources with different (pluggable)
+ * <p>The {@link AuthenticationFilter} enables protecting web application
+ * resources with different (pluggable)
  * authentication mechanisms and signer secret providers.
- * <p/>
+ * </p>
+ * <p>
  * Out of the box it provides 2 authentication mechanisms: Pseudo and Kerberos SPNEGO.
- * <p/>
+ * </p>
  * Additional authentication mechanisms are supported via the {@link AuthenticationHandler} interface.
- * <p/>
+ * <p>
  * This filter delegates to the configured authentication handler for authentication and once it obtains an
  * {@link AuthenticationToken} from it, sets a signed HTTP cookie with the token. For client requests
  * that provide the signed HTTP cookie, it verifies the validity of the cookie, extracts the user information
  * and lets the request proceed to the target resource.
- * <p/>
+ * </p>
  * The supported configuration properties are:
  * <ul>
  * <li>config.prefix: indicates the prefix to be used by all other configuration properties, the default value
@@ -71,18 +73,19 @@ import java.util.*;
  * <li>[#PREFIX#.]cookie.domain: domain to use for the HTTP cookie that stores the authentication token.</li>
  * <li>[#PREFIX#.]cookie.path: path to use for the HTTP cookie that stores the authentication token.</li>
  * </ul>
- * <p/>
+ * <p>
  * The rest of the configuration properties are specific to the {@link AuthenticationHandler} implementation and the
  * {@link AuthenticationFilter} will take all the properties that start with the prefix #PREFIX#, it will remove
  * the prefix from it and it will pass them to the the authentication handler for initialization. Properties that do
  * not start with the prefix will not be passed to the authentication handler initialization.
- * <p/>
+ * </p>
+ * <p>
  * Out of the box it provides 3 signer secret provider implementations:
  * "string", "random", and "zookeeper"
- * <p/>
+ * </p>
  * Additional signer secret providers are supported via the
  * {@link SignerSecretProvider} class.
- * <p/>
+ * <p>
  * For the HTTP cookies mentioned above, the SignerSecretProvider is used to
  * determine the secret to use for signing the cookies. Different
  * implementations can have different behaviors.  The "string" implementation
@@ -92,7 +95,7 @@ import java.util.*;
  * [#PREFIX#.]token.validity mentioned above.  The "zookeeper" implementation
  * is like the "random" one, except that it synchronizes the random secret
  * and rollovers between multiple servers; it's meant for HA services.
- * <p/>
+ * </p>
  * The relevant configuration properties are:
  * <ul>
  * <li>signer.secret.provider: indicates the name of the SignerSecretProvider
@@ -106,10 +109,10 @@ import java.util.*;
  * implementations are specified, this value is used as the rollover
  * interval.</li>
  * </ul>
- * <p/>
+ * <p>
  * The "zookeeper" implementation has additional configuration properties that
  * must be specified; see {@link ZKSignerSecretProvider} for details.
- * <p/>
+ * </p>
  * For subclasses of AuthenticationFilter that want additional control over the
  * SignerSecretProvider, they can use the following attribute set in the
  * ServletContext:
@@ -188,10 +191,9 @@ public class AuthenticationFilter implements Filter {
   private String cookiePath;
 
   /**
-   * Initializes the authentication filter and signer secret provider.
-   * <p/>
-   * It instantiates and initializes the specified {@link AuthenticationHandler}.
-   * <p/>
+   * <p>Initializes the authentication filter and signer secret provider.</p>
+   * It instantiates and initializes the specified {@link
+   * AuthenticationHandler}.
    *
    * @param filterConfig filter configuration.
    *
@@ -362,7 +364,7 @@ public class AuthenticationFilter implements Filter {
 
   /**
    * Destroys the filter.
-   * <p/>
+   * <p>
    * It invokes the {@link AuthenticationHandler#destroy()} method to release any resources it may hold.
    */
   @Override
@@ -380,7 +382,7 @@ public class AuthenticationFilter implements Filter {
    * Returns the filtered configuration (only properties starting with the specified prefix). The property keys
    * are also trimmed from the prefix. The returned {@link Properties} object is used to initialized the
    * {@link AuthenticationHandler}.
-   * <p/>
+   * <p>
    * This method can be overriden by subclasses to obtain the configuration from other configuration source than
    * the web.xml file.
    *
@@ -406,7 +408,7 @@ public class AuthenticationFilter implements Filter {
 
   /**
    * Returns the full URL of the request including the query string.
-   * <p/>
+   * <p>
    * Used as a convenience method for logging purposes.
    *
    * @param request the request object.
@@ -423,11 +425,11 @@ public class AuthenticationFilter implements Filter {
 
   /**
    * Returns the {@link AuthenticationToken} for the request.
-   * <p/>
+   * <p>
    * It looks at the received HTTP cookies and extracts the value of the {@link AuthenticatedURL#AUTH_COOKIE}
    * if present. It verifies the signature and if correct it creates the {@link AuthenticationToken} and returns
    * it.
-   * <p/>
+   * <p>
    * If this method returns <code>null</code> the filter will invoke the configured {@link AuthenticationHandler}
    * to perform user authentication.
    *
@@ -577,7 +579,7 @@ public class AuthenticationFilter implements Filter {
    *
    * @param token authentication token for the cookie.
    * @param expires UNIX timestamp that indicates the expire date of the
-   *                cookie. It has no effect if its value < 0.
+   *                cookie. It has no effect if its value &lt; 0.
    *
    * XXX the following code duplicate some logic in Jetty / Servlet API,
    * because of the fact that Hadoop is stuck at servlet 2.5 and jetty 6

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/server/AuthenticationHandler.java

@@ -23,16 +23,13 @@ import java.util.Properties;
 
 /**
  * Interface for server authentication mechanisms.
- * <p/>
  * The {@link AuthenticationFilter} manages the lifecycle of the authentication handler.
- * <p/>
  * Implementations must be thread-safe as one instance is initialized and used for all requests.
  */
 public interface AuthenticationHandler {
 
   /**
    * Returns the authentication type of the authentication handler.
-   * <p/>
    * This should be a name that uniquely identifies the authentication type.
    * For example 'simple' or 'kerberos'.
    *
@@ -42,7 +39,7 @@ public interface AuthenticationHandler {
 
   /**
    * Initializes the authentication handler instance.
-   * <p/>
+   * <p>
    * This method is invoked by the {@link AuthenticationFilter#init} method.
    *
    * @param config configuration properties to initialize the handler.
@@ -53,21 +50,21 @@ public interface AuthenticationHandler {
 
   /**
    * Destroys the authentication handler instance.
-   * <p/>
+   * <p>
    * This method is invoked by the {@link AuthenticationFilter#destroy} method.
    */
   public void destroy();
 
   /**
    * Performs an authentication management operation.
-   * <p/>
+   * <p>
    * This is useful for handling operations like get/renew/cancel
    * delegation tokens which are being handled as operations of the
    * service end-point.
-   * <p/>
+   * <p>
    * If the method returns <code>TRUE</code> the request will continue normal
    * processing, this means the method has not produced any HTTP response.
-   * <p/>
+   * <p>
    * If the method returns <code>FALSE</code> the request will end, this means 
    * the method has produced the corresponding HTTP response.
    *
@@ -88,17 +85,17 @@ public interface AuthenticationHandler {
 
   /**
    * Performs an authentication step for the given HTTP client request.
-   * <p/>
+   * <p>
    * This method is invoked by the {@link AuthenticationFilter} only if the HTTP client request is
    * not yet authenticated.
-   * <p/>
+   * <p>
    * Depending upon the authentication mechanism being implemented, a particular HTTP client may
    * end up making a sequence of invocations before authentication is successfully established (this is
    * the case of Kerberos SPNEGO).
-   * <p/>
+   * <p>
    * This method must return an {@link AuthenticationToken} only if the the HTTP client request has
    * been successfully and fully authenticated.
-   * <p/>
+   * <p>
    * If the HTTP client request has not been completely authenticated, this method must take over
    * the corresponding HTTP response and it must return <code>null</code>.
    *

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/server/AuthenticationToken.java

@@ -29,7 +29,7 @@ import javax.servlet.http.HttpServletRequest;
  * The {@link AuthenticationToken} contains information about an authenticated
  * HTTP client and doubles as the {@link Principal} to be returned by
  * authenticated {@link HttpServletRequest}s
- * <p/>
+ * <p>
  * The token can be serialized/deserialized to and from a string as it is sent
  * and received in HTTP client responses and requests as a HTTP cookie (this is
  * done by the {@link AuthenticationFilter}).
@@ -170,7 +170,7 @@ public class AuthenticationToken implements Principal {
 
   /**
    * Returns the string representation of the token.
-   * <p/>
+   * <p>
    * This string representation is parseable by the {@link #parse} method.
    *
    * @return the string representation of the token.

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/server/KerberosAuthenticationHandler.java

@@ -51,7 +51,7 @@ import static org.apache.hadoop.util.PlatformName.IBM_JAVA;
 
 /**
  * The {@link KerberosAuthenticationHandler} implements the Kerberos SPNEGO authentication mechanism for HTTP.
- * <p/>
+ * <p>
  * The supported configuration properties are:
  * <ul>
  * <li>kerberos.principal: the Kerberos principal to used by the server. As stated by the Kerberos SPNEGO
@@ -168,9 +168,9 @@ public class KerberosAuthenticationHandler implements AuthenticationHandler {
 
   /**
    * Initializes the authentication handler instance.
-   * <p/>
+   * <p>
    * It creates a Kerberos context using the principal and keytab specified in the configuration.
-   * <p/>
+   * <p>
    * This method is invoked by the {@link AuthenticationFilter#init} method.
    *
    * @param config configuration properties to initialize the handler.
@@ -243,7 +243,7 @@ public class KerberosAuthenticationHandler implements AuthenticationHandler {
 
   /**
    * Releases any resources initialized by the authentication handler.
-   * <p/>
+   * <p>
    * It destroys the Kerberos context.
    */
   @Override
@@ -262,7 +262,7 @@ public class KerberosAuthenticationHandler implements AuthenticationHandler {
 
   /**
    * Returns the authentication type of the authentication handler, 'kerberos'.
-   * <p/>
+   * <p>
    *
    * @return the authentication type of the authentication handler, 'kerberos'.
    */
@@ -313,7 +313,6 @@ public class KerberosAuthenticationHandler implements AuthenticationHandler {
   /**
    * It enforces the the Kerberos SPNEGO authentication sequence returning an {@link AuthenticationToken} only
    * after the Kerberos SPNEGO sequence has completed successfully.
-   * <p/>
    *
    * @param request the HTTP client request.
    * @param response the HTTP client response.

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/server/PseudoAuthenticationHandler.java

@@ -30,12 +30,12 @@ import java.util.Properties;
 /**
  * The <code>PseudoAuthenticationHandler</code> provides a pseudo authentication mechanism that accepts
  * the user name specified as a query string parameter.
- * <p/>
+ * <p>
  * This mimics the model of Hadoop Simple authentication which trust the 'user.name' property provided in
  * the configuration object.
- * <p/>
+ * <p>
  * This handler can be configured to support anonymous users.
- * <p/>
+ * <p>
  * The only supported configuration property is:
  * <ul>
  * <li>simple.anonymous.allowed: <code>true|false</code>, default value is <code>false</code></li>
@@ -77,7 +77,7 @@ public class PseudoAuthenticationHandler implements AuthenticationHandler {
 
   /**
    * Initializes the authentication handler instance.
-   * <p/>
+   * <p>
    * This method is invoked by the {@link AuthenticationFilter#init} method.
    *
    * @param config configuration properties to initialize the handler.
@@ -100,7 +100,7 @@ public class PseudoAuthenticationHandler implements AuthenticationHandler {
 
   /**
    * Releases any resources initialized by the authentication handler.
-   * <p/>
+   * <p>
    * This implementation does a NOP.
    */
   @Override
@@ -109,7 +109,6 @@ public class PseudoAuthenticationHandler implements AuthenticationHandler {
 
   /**
    * Returns the authentication type of the authentication handler, 'simple'.
-   * <p/>
    *
    * @return the authentication type of the authentication handler, 'simple'.
    */
@@ -153,14 +152,14 @@ public class PseudoAuthenticationHandler implements AuthenticationHandler {
 
   /**
    * Authenticates an HTTP client request.
-   * <p/>
+   * <p>
    * It extracts the {@link PseudoAuthenticator#USER_NAME} parameter from the query string and creates
    * an {@link AuthenticationToken} with it.
-   * <p/>
+   * <p>
    * If the HTTP client request does not contain the {@link PseudoAuthenticator#USER_NAME} parameter and
    * the handler is configured to allow anonymous users it returns the {@link AuthenticationToken#ANONYMOUS}
    * token.
-   * <p/>
+   * <p>
    * If the HTTP client request does not contain the {@link PseudoAuthenticator#USER_NAME} parameter and
    * the handler is configured to disallow anonymous users it throws an {@link AuthenticationException}.
    *

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/util/KerberosName.java

@@ -92,7 +92,7 @@ public class KerberosName {
 
   /**
    * Create a name from the full Kerberos principal name.
-   * @param name
+   * @param name full Kerberos principal name.
    */
   public KerberosName(String name) {
     Matcher match = nameParser.matcher(name);
@@ -367,7 +367,7 @@ public class KerberosName {
    * Get the translation of the principal name into an operating system
    * user name.
    * @return the short name
-   * @throws IOException
+   * @throws IOException throws if something is wrong with the rules
    */
   public String getShortName() throws IOException {
     String[] params;

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/util/KerberosUtil.java

@@ -135,12 +135,10 @@ public class KerberosUtil {
   /**
    * Get all the unique principals from keytabfile which matches a pattern.
    * 
-   * @param keytab 
-   *          Name of the keytab file to be read.
-   * @param pattern 
-   *         pattern to be matched.
+   * @param keytab Name of the keytab file to be read.
+   * @param pattern pattern to be matched.
    * @return list of unique principals which matches the pattern.
-   * @throws IOException 
+   * @throws IOException if cannot get the principal name
    */
   public static final String[] getPrincipalNames(String keytab,
       Pattern pattern) throws IOException {

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/util/Signer.java

@@ -41,8 +41,6 @@ public class Signer {
 
   /**
    * Returns a signed string.
-   * <p/>
-   * The signature '&s=SIGNATURE' is appended at the end of the string.
    *
    * @param str string to sign.
    *

hadoop-common-project/hadoop-auth/src/main/java/org/apache/hadoop/security/authentication/util/ZKSignerSecretProvider.java

@@ -44,7 +44,7 @@ import org.slf4j.LoggerFactory;
 /**
  * A SignerSecretProvider that synchronizes a rolling random secret between
  * multiple servers using ZooKeeper.
- * <p/>
+ * <p>
  * It works by storing the secrets and next rollover time in a ZooKeeper znode.
  * All ZKSignerSecretProviders looking at that znode will use those
  * secrets and next rollover time to ensure they are synchronized.  There is no
@@ -55,7 +55,7 @@ import org.slf4j.LoggerFactory;
  * your own Curator client, you can pass it to ZKSignerSecretProvider; see
  * {@link org.apache.hadoop.security.authentication.server.AuthenticationFilter}
  * for more details.
- * <p/>
+ * <p>
  * The supported configuration properties are:
  * <ul>
  * <li>signer.secret.provider.zookeeper.connection.string: indicates the
@@ -77,11 +77,13 @@ import org.slf4j.LoggerFactory;
  * </ul>
  *
  * The following attribute in the ServletContext can also be set if desired:
+ * <ul>
  * <li>signer.secret.provider.zookeeper.curator.client: A CuratorFramework
  * client object can be passed here. If given, the "zookeeper" implementation
  * will use this Curator client instead of creating its own, which is useful if
  * you already have a Curator client or want more control over its
  * configuration.</li>
+ * </ul>
  */
 @InterfaceStability.Unstable
 @InterfaceAudience.Private
@@ -374,7 +376,7 @@ public class ZKSignerSecretProvider extends RolloverSignerSecretProvider {
    * This method creates the Curator client and connects to ZooKeeper.
    * @param config configuration properties
    * @return A Curator client
-   * @throws java.lang.Exception
+   * @throws Exception
    */
   protected CuratorFramework createCuratorClient(Properties config)
           throws Exception {

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -27,6 +27,9 @@ Release 2.6.3 - UNRELEASED
     HADOOP-11267. TestSecurityUtil fails when run with JDK8 because of empty
     principal names. (Stephen Chu via wheat9)
 
+    HADOOP-10134 [JDK8] Fix Javadoc errors caused by incorrect or illegal tags in doc
+    comments. (apurtell via stevel)
+
 Release 2.6.2 - 2015-10-28
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-minikdc/src/main/java/org/apache/hadoop/minikdc/MiniKdc.java

@@ -79,9 +79,9 @@ import java.util.UUID;
 /**
  * Mini KDC based on Apache Directory Server that can be embedded in testcases
  * or used from command line as a standalone KDC.
- * <p/>
+ * <p>
  * <b>From within testcases:</b>
- * <p/>
+ * <p>
  * MiniKdc sets 2 System properties when started and un-sets them when stopped:
  * <ul>
  *   <li>java.security.krb5.conf: set to the MiniKDC real/host/port</li>
@@ -92,7 +92,7 @@ import java.util.UUID;
  * For example, running testcases in parallel that start a KDC each. To
  * accomplish this a single MiniKdc should be used for all testcases running
  * in parallel.
- * <p/>
+ * <p>
  * MiniKdc default configuration values are:
  * <ul>
  *   <li>org.name=EXAMPLE (used to create the REALM)</li>
@@ -106,7 +106,6 @@ import java.util.UUID;
  *   <li>debug=false</li>
  * </ul>
  * The generated krb5.conf forces TCP connections.
- * <p/>
  */
 public class MiniKdc {
 
@@ -218,7 +217,7 @@ public class MiniKdc {
 
   /**
    * Convenience method that returns MiniKdc default configuration.
-   * <p/>
+   * <p>
    * The returned configuration is a copy, it can be customized before using
    * it to create a MiniKdc.
    * @return a MiniKdc default configuration.
@@ -484,7 +483,6 @@ public class MiniKdc {
 
   /**
    * Stops the MiniKdc
-   * @throws Exception
    */
   public synchronized void stop() {
     if (kdc != null) {

hadoop-maven-plugins/src/main/java/org/apache/hadoop/maven/plugin/util/Exec.java

@@ -42,8 +42,8 @@ public class Exec {
    * Runs the specified command and saves each line of the command's output to
    * the given list.
    * 
-   * @param command List<String> containing command and all arguments
-   * @param output List<String> in/out parameter to receive command output
+   * @param command List containing command and all arguments
+   * @param output List in/out parameter to receive command output
    * @return int exit code of command
    */
   public int run(List<String> command, List<String> output) {

hadoop-maven-plugins/src/main/java/org/apache/hadoop/maven/plugin/util/FileSetUtils.java

@@ -47,7 +47,7 @@ public class FileSetUtils {
    * Converts a Maven FileSet to a list of File objects.
    * 
    * @param source FileSet to convert
-   * @return List<File> containing every element of the FileSet as a File
+   * @return List containing every element of the FileSet as a File
    * @throws IOException if an I/O error occurs while trying to find the files
    */
   @SuppressWarnings("unchecked")