HADOOP-15013. Fix ResourceEstimator findbugs issues. (asuresh)

hadoop-tools/hadoop-resourceestimator/src/main/java/org/apache/hadoop/resourceestimator/service/ResourceEstimatorService.java

@@ -65,17 +65,16 @@
 @Singleton @Path("/resourceestimator") public class ResourceEstimatorService {
   private static final Logger LOGGER =
       LoggerFactory.getLogger(ResourceEstimatorService.class);
-  private static SkylineStore skylineStore;
-  private static Solver solver;
-  private static LogParser logParser;
-  private static LogParserUtil logParserUtil = new LogParserUtil();
-  private static Configuration config;
-  private static Gson gson;
-  private static Type rleType;
-  private static Type skylineStoreType;
+  private final SkylineStore skylineStore;
+  private final Solver solver;
+  private final LogParser logParser;
+  private final LogParserUtil logParserUtil = new LogParserUtil();
+  private final Configuration config;
+  private final Gson gson;
+  private final Type rleType;
+  private final Type skylineStoreType;
 
   public ResourceEstimatorService() throws ResourceEstimatorException {
-    if (skylineStore == null) {
     try {
       config = new Configuration();
       config.addResource(ResourceEstimatorConfiguration.CONFIG_FILE);
@@ -110,7 +109,6 @@ public ResourceEstimatorService() throws ResourceEstimatorException {
         new TypeToken<Map<RecurrenceId, List<ResourceSkyline>>>() {
         }.getType();
   }
-  }
 
   /**
    * Parse the log file. See also {@link LogParser#parseStream(InputStream)}.
@@ -192,9 +190,6 @@ public String getHistoryResourceSkyline(
     LOGGER
         .debug("Query the skyline store for recurrenceId: {}." + recurrenceId);
 
-    recurrenceId = new RecurrenceId("*", "*");
-    jobHistory = skylineStore.getHistory(recurrenceId);
-
     return skyline;
   }
 

hadoop-tools/hadoop-resourceestimator/src/main/java/org/apache/hadoop/resourceestimator/translator/impl/BaseLogParser.java

@@ -24,11 +24,13 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
 import java.text.ParseException;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import org.apache.commons.lang.CharSet;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.resourceestimator.common.api.RecurrenceId;
 import org.apache.hadoop.resourceestimator.common.api.ResourceSkyline;
@@ -101,7 +103,8 @@ public void parseLine(final String logLine,
         new HashMap<>();
     final Map<String, JobMetaData> jobMetas =
         new HashMap<String, JobMetaData>();
-    final BufferedReader bf = new BufferedReader(new InputStreamReader(logs));
+    final BufferedReader bf = new BufferedReader(
+        new InputStreamReader(logs, StandardCharsets.UTF_8));
     String line = null;
     while ((line = bf.readLine()) != null) {
       try {

hadoop-tools/hadoop-resourceestimator/src/main/java/org/apache/hadoop/resourceestimator/translator/impl/LogParserUtil.java

@@ -91,7 +91,14 @@ public final void parseLog(final String logFile)
       throw new ResourceEstimatorException("The log parser is not initialized,"
           + " please try again after initializing.");
     }
-    InputStream inputStream = new FileInputStream(logFile);
+    InputStream inputStream = null;
+    try {
+      inputStream = new FileInputStream(logFile);
       logParser.parseStream(inputStream);
+    } finally {
+      if (inputStream != null) {
+        inputStream.close();
+      }
+    }
   }
 }

hadoop-tools/hadoop-resourceestimator/src/test/java/org/apache/hadoop/resourceestimator/service/TestResourceEstimatorService.java

@@ -54,8 +54,6 @@
  * Test ResourceEstimatorService.
  */
 public class TestResourceEstimatorService extends JerseyTest {
-  private static final Logger LOGGER =
-      LoggerFactory.getLogger(TestResourceEstimatorService.class);
   private final String parseLogCommand = "resourceestimator/translator/"
       + "src/test/resources/resourceEstimatorService.txt";
   private final String getHistorySkylineCommand =