HADOOP-14400. Fix warnings from spotbugs in hadoop-tools. Contributed by Weiwei Yang.

2017-05-10 05:57:12 -05:00 · 2017-05-10 05:57:12 -05:00 · 2ba9903932
parent a5fa954684
commit 2ba9903932
9 changed files with 58 additions and 49 deletions
--- a/hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/NativeAzureFileSystem.java
+++ b/hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/NativeAzureFileSystem.java
@ -2451,8 +2451,6 @@ public class NativeAzureFileSystem extends FileSystem {


    ArrayList<String> keysToCreateAsFolder = new ArrayList<String>();
-    ArrayList<String> keysToUpdateAsFolder = new ArrayList<String>();
-    boolean childCreated = false;
    // Check that there is no file in the parent chain of the given path.
    for (Path current = absolutePath, parent = current.getParent();
        parent != null; // Stop when you get to the root
@ -2464,14 +2462,6 @@ public class NativeAzureFileSystem extends FileSystem {
            + current + " is an existing file.");
      } else if (currentMetadata == null) {
        keysToCreateAsFolder.add(currentKey);
-        childCreated = true;
-      } else {
-        // The directory already exists. Its last modified time need to be
-        // updated if there is a child directory created under it.
-        if (childCreated) {
-          keysToUpdateAsFolder.add(currentKey);
-        }
-        childCreated = false;
      }
    }

--- a/hadoop-tools/hadoop-gridmix/src/main/java/org/apache/hadoop/mapred/gridmix/InputStriper.java
+++ b/hadoop-tools/hadoop-gridmix/src/main/java/org/apache/hadoop/mapred/gridmix/InputStriper.java
@ -131,9 +131,7 @@ class InputStriper {
  static final Comparator<Entry<String,Double>> hostRank =
    new Comparator<Entry<String,Double>>() {
      public int compare(Entry<String,Double> a, Entry<String,Double> b) {
-          final double va = a.getValue();
-          final double vb = b.getValue();
-          return va > vb ? -1 : va < vb ? 1 : 0;
-        }
+        return Double.compare(a.getValue(), b.getValue());
+      }
    };
 }
--- a/hadoop-tools/hadoop-gridmix/src/main/java/org/apache/hadoop/mapred/gridmix/emulators/resourceusage/TotalHeapUsageEmulatorPlugin.java
+++ b/hadoop-tools/hadoop-gridmix/src/main/java/org/apache/hadoop/mapred/gridmix/emulators/resourceusage/TotalHeapUsageEmulatorPlugin.java
@ -19,6 +19,8 @@ package org.apache.hadoop.mapred.gridmix.emulators.resourceusage;

 import java.io.IOException;
 import java.util.ArrayList;
+
+import com.google.common.annotations.VisibleForTesting;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.mapred.gridmix.Progressive;
 import org.apache.hadoop.tools.rumen.ResourceUsageMetrics;
@ -129,7 +131,7 @@ implements ResourceUsageEmulatorPlugin {
  public static class DefaultHeapUsageEmulator 
  implements HeapUsageEmulatorCore {
    // store the unit loads in a list
-    protected static final ArrayList<Object> heapSpace =
+    private static final ArrayList<Object> heapSpace =
        new ArrayList<Object>();
    
    /**
@ -142,7 +144,17 @@ implements ResourceUsageEmulatorPlugin {
        heapSpace.add((Object)new byte[ONE_MB]);
      }
    }
-    
+
+    /**
+     * Gets the total number of 1mb objects stored in the emulator.
+     *
+     * @return total number of 1mb objects.
+     */
+    @VisibleForTesting
+    public int getHeapSpaceSize() {
+      return heapSpace.size();
+    }
+
    /**
     * This will initialize the core and check if the core can emulate the 
     * desired target on the underlying hardware.
--- a/hadoop-tools/hadoop-gridmix/src/test/java/org/apache/hadoop/mapred/gridmix/TestGridmixMemoryEmulation.java
+++ b/hadoop-tools/hadoop-gridmix/src/test/java/org/apache/hadoop/mapred/gridmix/TestGridmixMemoryEmulation.java
@ -58,7 +58,7 @@ public class TestGridmixMemoryEmulation {
    
    // Get the total number of 1mb objects stored within
    long getHeapUsageInMB() {
-      return heapSpace.size();
+      return getHeapSpaceSize();
    }
    
    @Override
--- a/hadoop-tools/hadoop-rumen/src/main/java/org/apache/hadoop/tools/rumen/datatypes/util/MapReduceJobPropertiesParser.java
+++ b/hadoop-tools/hadoop-rumen/src/main/java/org/apache/hadoop/tools/rumen/datatypes/util/MapReduceJobPropertiesParser.java
@ -130,7 +130,7 @@ public class MapReduceJobPropertiesParser implements JobPropertyParser {
  /**
   * Extracts the -Xmx heap option from the specified string.
   */
-  public static void extractMaxHeapOpts(String javaOptions, 
+  public static void extractMaxHeapOpts(final String javaOptions,
                                        List<String> heapOpts, 
                                        List<String> others) {
    for (String opt : javaOptions.split(" ")) {
@ -160,6 +160,7 @@ public class MapReduceJobPropertiesParser implements JobPropertyParser {
  
  // Maps the value of the specified key.
  private DataType<?> fromString(String key, String value) {
+    DefaultDataType defaultValue = new DefaultDataType(value);
    if (value != null) {
      // check known configs
      //  job-name
@ -190,14 +191,13 @@ public class MapReduceJobPropertiesParser implements JobPropertyParser {
      // check if the config parameter represents a number
      try {
        format.parse(value);
-        return new DefaultDataType(value);
+        return defaultValue;
      } catch (ParseException pe) {}

      // check if the config parameters represents a boolean 
      // avoiding exceptions
      if ("true".equals(value) || "false".equals(value)) {
-        Boolean.parseBoolean(value);
-        return new DefaultDataType(value);
+        return defaultValue;
      }

      // check if the config parameter represents a class
@ -208,7 +208,7 @@ public class MapReduceJobPropertiesParser implements JobPropertyParser {
      // handle distributed cache sizes and timestamps
      if (latestKey.endsWith("sizes") 
          || latestKey.endsWith(".timestamps")) {
-        new DefaultDataType(value);
+        return defaultValue;
      }
      
      // check if the config parameter represents a file-system path
--- a/hadoop-tools/hadoop-sls/src/main/java/org/apache/hadoop/yarn/sls/SLSRunner.java
+++ b/hadoop-tools/hadoop-sls/src/main/java/org/apache/hadoop/yarn/sls/SLSRunner.java
@ -32,6 +32,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Random;
 import java.util.Set;
+import java.util.Collections;
 import java.util.concurrent.ConcurrentHashMap;

 import com.fasterxml.jackson.core.JsonFactory;
@ -113,7 +114,8 @@ public class SLSRunner extends Configured implements Tool {
  // other simulation information
  private int numNMs, numRacks, numAMs, numTasks;
  private long maxRuntime;
-  public final static Map<String, Object> simulateInfoMap =
+
+  private final static Map<String, Object> simulateInfoMap =
          new HashMap<String, Object>();

  // logger
@ -165,6 +167,13 @@ public class SLSRunner extends Configured implements Tool {
    }
  }

+  /**
+   * @return an unmodifiable view of the simulated info map.
+   */
+  public static Map<String, Object> getSimulateInfoMap() {
+    return Collections.unmodifiableMap(simulateInfoMap);
+  }
+
  public void setSimulationParams(TraceType inType, String[] inTraces,
      String nodes, String outDir, Set<String> trackApps,
      boolean printsimulation) throws IOException, ClassNotFoundException {
--- a/hadoop-tools/hadoop-sls/src/main/java/org/apache/hadoop/yarn/sls/scheduler/FairSchedulerMetrics.java
+++ b/hadoop-tools/hadoop-sls/src/main/java/org/apache/hadoop/yarn/sls/scheduler/FairSchedulerMetrics.java
@ -180,16 +180,16 @@ public class FairSchedulerMetrics extends SchedulerMetrics {
      new Gauge<Long>() {
        @Override
        public Long getValue() {
-          if (! maxReset &&
-                  SLSRunner.simulateInfoMap.containsKey("Number of nodes") &&
-                  SLSRunner.simulateInfoMap.containsKey("Node memory (MB)") &&
-                  SLSRunner.simulateInfoMap.containsKey("Node VCores")) {
-            int numNMs = Integer.parseInt(
-                  SLSRunner.simulateInfoMap.get("Number of nodes").toString());
-            int numMemoryMB = Integer.parseInt(
-                  SLSRunner.simulateInfoMap.get("Node memory (MB)").toString());
-            int numVCores = Integer.parseInt(
-                  SLSRunner.simulateInfoMap.get("Node VCores").toString());
+          if (! maxReset
+              && SLSRunner.getSimulateInfoMap().containsKey("Number of nodes")
+              && SLSRunner.getSimulateInfoMap().containsKey("Node memory (MB)")
+              && SLSRunner.getSimulateInfoMap().containsKey("Node VCores")) {
+            int numNMs = Integer.parseInt(SLSRunner.getSimulateInfoMap()
+                .get("Number of nodes").toString());
+            int numMemoryMB = Integer.parseInt(SLSRunner.getSimulateInfoMap()
+                .get("Node memory (MB)").toString());
+            int numVCores = Integer.parseInt(SLSRunner.getSimulateInfoMap()
+                .get("Node VCores").toString());

            totalMemoryMB = numNMs * numMemoryMB;
            totalVCores = numNMs * numVCores;
--- a/hadoop-tools/hadoop-sls/src/main/java/org/apache/hadoop/yarn/sls/web/SLSWebApp.java
+++ b/hadoop-tools/hadoop-sls/src/main/java/org/apache/hadoop/yarn/sls/web/SLSWebApp.java
@ -187,14 +187,14 @@ public class SLSWebApp extends HttpServlet {
    response.setStatus(HttpServletResponse.SC_OK);

    String simulateInfo;
-    if (SLSRunner.simulateInfoMap.isEmpty()) {
+    if (SLSRunner.getSimulateInfoMap().isEmpty()) {
      String empty = "<tr><td colspan='2' align='center'>" +
              "No information available</td></tr>";
      simulateInfo = MessageFormat.format(simulateInfoTemplate, empty);
    } else {
      StringBuilder info = new StringBuilder();
      for (Map.Entry<String, Object> entry :
-              SLSRunner.simulateInfoMap.entrySet()) {
+              SLSRunner.getSimulateInfoMap().entrySet()) {
        info.append("<tr>");
        info.append("<td class='td1'>").append(entry.getKey()).append("</td>");
        info.append("<td class='td2'>").append(entry.getValue())
--- a/hadoop-tools/hadoop-sls/src/test/java/org/apache/hadoop/yarn/sls/web/TestSLSWebApp.java
+++ b/hadoop-tools/hadoop-sls/src/test/java/org/apache/hadoop/yarn/sls/web/TestSLSWebApp.java
@ -20,7 +20,6 @@ package org.apache.hadoop.yarn.sls.web;

 import org.junit.Assert;
 import org.apache.commons.io.FileUtils;
-import org.apache.hadoop.yarn.sls.SLSRunner;
 import org.junit.Test;

 import java.io.File;
@ -28,6 +27,7 @@ import java.text.MessageFormat;
 import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;
+import java.util.HashMap;

 public class TestSLSWebApp {

@ -36,20 +36,21 @@ public class TestSLSWebApp {
    String simulateInfoTemplate = FileUtils.readFileToString(
            new File("src/main/html/simulate.info.html.template"));

-    SLSRunner.simulateInfoMap.put("Number of racks", 10);
-    SLSRunner.simulateInfoMap.put("Number of nodes", 100);
-    SLSRunner.simulateInfoMap.put("Node memory (MB)", 1024);
-    SLSRunner.simulateInfoMap.put("Node VCores", 1);
-    SLSRunner.simulateInfoMap.put("Number of applications", 100);
-    SLSRunner.simulateInfoMap.put("Number of tasks", 1000);
-    SLSRunner.simulateInfoMap.put("Average tasks per applicaion", 10);
-    SLSRunner.simulateInfoMap.put("Number of queues", 4);
-    SLSRunner.simulateInfoMap.put("Average applications per queue", 25);
-    SLSRunner.simulateInfoMap.put("Estimated simulate time (s)", 10000);
+    Map<String, Object> simulateInfoMap = new HashMap<>();
+    simulateInfoMap.put("Number of racks", 10);
+    simulateInfoMap.put("Number of nodes", 100);
+    simulateInfoMap.put("Node memory (MB)", 1024);
+    simulateInfoMap.put("Node VCores", 1);
+    simulateInfoMap.put("Number of applications", 100);
+    simulateInfoMap.put("Number of tasks", 1000);
+    simulateInfoMap.put("Average tasks per applicaion", 10);
+    simulateInfoMap.put("Number of queues", 4);
+    simulateInfoMap.put("Average applications per queue", 25);
+    simulateInfoMap.put("Estimated simulate time (s)", 10000);

    StringBuilder info = new StringBuilder();
    for (Map.Entry<String, Object> entry :
-            SLSRunner.simulateInfoMap.entrySet()) {
+        simulateInfoMap.entrySet()) {
      info.append("<tr>");
      info.append("<td class='td1'>" + entry.getKey() + "</td>");
      info.append("<td class='td2'>" + entry.getValue() + "</td>");
@ -60,8 +61,7 @@ public class TestSLSWebApp {
            MessageFormat.format(simulateInfoTemplate, info.toString());
    Assert.assertTrue("The simulate info html page should not be empty",
            simulateInfo.length() > 0);
-    for (Map.Entry<String, Object> entry :
-            SLSRunner.simulateInfoMap.entrySet()) {
+    for (Map.Entry<String, Object> entry : simulateInfoMap.entrySet()) {
      Assert.assertTrue("The simulate info html page should have information "
              + "of " + entry.getKey(), simulateInfo.contains("<td class='td1'>"
              + entry.getKey() + "</td><td class='td2'>"