HADOOP-12712. Fix some cmake plugin and native build warnings (cmccabe)

(cherry picked from commit b2c155f810)

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

@@ -48,6 +48,8 @@ Release 2.9.0 - UNRELEASED
    HDFS-9517. Fix missing @Test annotation on
    TestDistCpUtils.testUnpackAttributes (Wei-Chiu Chuang via cmccabe)
 
+   HADOOP-12712. Fix some cmake plugin and native build warnings (cmccabe)
+
 Release 2.8.0 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/net/unix/DomainSocket.c

@@ -268,7 +268,7 @@ Java_org_apache_hadoop_net_unix_DomainSocket_validateSocketPathSecurity0(
 JNIEnv *env, jclass clazz, jobject jstr, jint skipComponents)
 {
   jint utfLength;
-  char path[PATH_MAX], check[PATH_MAX], *token, *rest, *rest_free;
+  char path[PATH_MAX], check[PATH_MAX], *token, *rest, *rest_free = NULL;
   struct stat st;
   int ret, mode, strlenPath;
   uid_t uid;

hadoop-maven-plugins/src/main/java/org/apache/hadoop/maven/plugin/cmakebuilder/CompileMojo.java

@@ -22,18 +22,15 @@ import org.apache.maven.plugins.annotations.LifecyclePhase;
 import org.apache.maven.plugins.annotations.Mojo;
 import org.apache.maven.plugins.annotations.Parameter;
 
-import java.io.BufferedReader;
 import java.io.File;
 import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
 import java.util.concurrent.TimeUnit;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 
 /**
- * Goal which builds the native sources
+ * Goal which builds the native sources.
  */
 @Mojo(name="cmake-compile", defaultPhase = LifecyclePhase.COMPILE)
 public class CompileMojo extends AbstractMojo {
@@ -203,8 +200,6 @@ public class CompileMojo extends AbstractMojo {
   public void runMake() throws MojoExecutionException {
     List<String> cmd = new LinkedList<String>();
     cmd.add("make");
-    // TODO: it would be nice to determine the number of CPUs and set the
-    // parallelism to that.  It requires some platform-specific logic, though.
     cmd.add("-j");
     cmd.add(String.valueOf(availableProcessors));
     cmd.add("VERBOSE=1");
@@ -263,7 +258,9 @@ public class CompileMojo extends AbstractMojo {
           getLog().warn(line);
         }
       }
-      if (proc != null) proc.destroy();
+      if (proc != null) {
+        proc.destroy();
+      }
     }
   }
 }

hadoop-maven-plugins/src/main/java/org/apache/hadoop/maven/plugin/cmakebuilder/TestMojo.java

@@ -60,7 +60,6 @@ public class TestMojo extends AbstractMojo {
 
   /**
    * Environment variables to pass to the binary.
-   *
    */
   @Parameter
   private Map<String, String> env;
@@ -105,7 +104,7 @@ public class TestMojo extends AbstractMojo {
   private String expectedResult;
 
   /**
-   * The Maven Session Object
+   * The Maven Session Object.
    */
   @Parameter(defaultValue="${session}", readonly=true, required=true)
   private MavenSession session;
@@ -205,7 +204,7 @@ public class TestMojo extends AbstractMojo {
   private boolean shouldRunTest() throws MojoExecutionException {
     // Were we told to skip all tests?
     String skipTests = session.
-        getExecutionProperties().getProperty("skipTests");
+        getSystemProperties().getProperty("skipTests");
     if (isTruthy(skipTests)) {
       getLog().info("skipTests is in effect for test " + testName);
       return false;
@@ -223,7 +222,7 @@ public class TestMojo extends AbstractMojo {
     // If there is an explicit list of tests to run, it should include this
     // test.
     String testProp = session.
-        getExecutionProperties().getProperty("test");
+        getSystemProperties().getProperty("test");
     if (testProp != null) {
       String testPropArr[] = testProp.split(",");
       boolean found = false;
@@ -252,7 +251,8 @@ public class TestMojo extends AbstractMojo {
         if (key == null) {
           throw new MojoExecutionException("NULL is not a valid " +
                "precondition type.  " + VALID_PRECONDITION_TYPES_STR);
-        } if (key.equals("and")) {
+        }
+        if (key.equals("and")) {
           if (!isTruthy(val)) {
             getLog().info("Skipping test " + testName +
                 " because precondition number " + idx + " was not met.");

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

@@ -127,9 +127,9 @@ public class Exec {
     }
 
     /**
-     * Returns every line consumed from the input.
+     * Get every line consumed from the input.
      * 
-     * @return List<String> every line consumed from the input
+     * @return  Every line consumed from the input
      */
     public List<String> getOutput() {
       return output;
@@ -138,6 +138,9 @@ public class Exec {
 
   /**
    * Add environment variables to a ProcessBuilder.
+   *
+   * @param pb      The ProcessBuilder
+   * @param env     A map of environment variable names to values.
    */
   public static void addEnvironment(ProcessBuilder pb,
         Map<String, String> env) {
@@ -156,6 +159,10 @@ public class Exec {
 
   /**
    * Pretty-print the environment to a StringBuilder.
+   *
+   * @param env     A map of environment variable names to values to print.
+   *
+   * @return        The pretty-printed string.
    */
   public static String envToString(Map<String, String> env) {
     StringBuilder bld = new StringBuilder();

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/native/container-executor/impl/configuration.c

@@ -320,7 +320,7 @@ char ** extract_values_delim(char *value, const char *delim) {
  * Extracts array of values from the '%' separated list of values.
  */
 char ** extract_values(char *value) {
-  extract_values_delim(value, "%");
+  return extract_values_delim(value, "%");
 }
 
 // free an entry set of values