MAPREDUCE-2784. [Gridmix] Bug fixes in ExecutionSummarizer and ResourceUsageMatcher. (amarrk)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1166636 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -6,6 +6,10 @@ Trunk (unreleased changes)
 
     MAPREDUCE-2887 due to HADOOP-7524 Change RPC to allow multiple protocols including multuple versions of the same protocol (sanjay Radia)
 
+  BUG FIXES
+    MAPREDUCE-2784. [Gridmix] Bug fixes in ExecutionSummarizer and 
+    ResourceUsageMatcher. (amarrk)
+
 Release 0.23.0 - Unreleased
 
   INCOMPATIBLE CHANGES

hadoop-mapreduce-project/src/contrib/gridmix/src/java/org/apache/hadoop/mapred/gridmix/ExecutionSummarizer.java

@@ -149,10 +149,15 @@ class ExecutionSummarizer implements StatListener<JobStats> {
   throws IOException {
     numJobsInInputTrace = factory.numJobsInTrace;
     endTime = System.currentTimeMillis();
-    Path inputTracePath = new Path(inputPath);
-    FileSystem fs = inputTracePath.getFileSystem(conf);
-    inputTraceLocation = fs.makeQualified(inputTracePath).toString();
-    inputTraceSignature = getTraceSignature(inputTraceLocation);
+     if ("-".equals(inputPath)) {
+      inputTraceLocation = Summarizer.NA;
+      inputTraceSignature = Summarizer.NA;
+    } else {
+      Path inputTracePath = new Path(inputPath);
+      FileSystem fs = inputTracePath.getFileSystem(conf);
+      inputTraceLocation = fs.makeQualified(inputTracePath).toString();
+      inputTraceSignature = getTraceSignature(inputPath);
+    }
     jobSubmissionPolicy = Gridmix.getJobSubmissionPolicy(conf).name();
     resolver = userResolver.getClass().getName();
     if (dataSize > 0) {

hadoop-mapreduce-project/src/contrib/gridmix/src/java/org/apache/hadoop/mapred/gridmix/Gridmix.java

@@ -314,9 +314,13 @@ public class Gridmix extends Configured implements Tool {
       }
     });
     
-    // print the run summary
-    System.out.print("\n\n");
-    System.out.println(summarizer.toString());
+    // print the gridmix summary if the run was successful
+    if (val == 0) {
+        // print the run summary
+        System.out.print("\n\n");
+        System.out.println(summarizer.toString());
+    }
+    
     return val; 
   }
 

hadoop-mapreduce-project/src/contrib/gridmix/src/java/org/apache/hadoop/mapred/gridmix/emulators/resourceusage/ResourceUsageMatcher.java

@@ -52,15 +52,23 @@ public class ResourceUsageMatcher {
   @SuppressWarnings("unchecked")
   public void configure(Configuration conf, ResourceCalculatorPlugin monitor, 
                         ResourceUsageMetrics metrics, Progressive progress) {
-    Class[] plugins = 
-      conf.getClasses(RESOURCE_USAGE_EMULATION_PLUGINS, 
-                      ResourceUsageEmulatorPlugin.class);
+    Class[] plugins = conf.getClasses(RESOURCE_USAGE_EMULATION_PLUGINS);
     if (plugins == null) {
       System.out.println("No resource usage emulator plugins configured.");
     } else {
-      for (Class<? extends ResourceUsageEmulatorPlugin> plugin : plugins) {
-        if (plugin != null) {
-          emulationPlugins.add(ReflectionUtils.newInstance(plugin, conf));
+      for (Class clazz : plugins) {
+        if (clazz != null) {
+          if (ResourceUsageEmulatorPlugin.class.isAssignableFrom(clazz)) {
+            ResourceUsageEmulatorPlugin plugin = 
+              (ResourceUsageEmulatorPlugin) ReflectionUtils.newInstance(clazz, 
+                                                                        conf);
+            emulationPlugins.add(plugin);
+          } else {
+            throw new RuntimeException("Misconfigured resource usage plugins. " 
+                + "Class " + clazz.getClass().getName() + " is not a resource "
+                + "usage plugin as it does not extend "
+                + ResourceUsageEmulatorPlugin.class.getName());
+          }
         }
       }
     }

hadoop-mapreduce-project/src/contrib/gridmix/src/test/org/apache/hadoop/mapred/gridmix/TestGridmixSummary.java

@@ -159,7 +159,7 @@ public class TestGridmixSummary {
     
     @Override
     protected Thread createReaderThread() {
-      return null;
+      return new Thread();
     }
   }
   
@@ -243,7 +243,7 @@ public class TestGridmixSummary {
                  tid, es.getInputTraceSignature());
     // test trace location
     Path qPath = fs.makeQualified(testTraceFile);
-    assertEquals("Mismatch in trace signature", 
+    assertEquals("Mismatch in trace filename", 
                  qPath.toString(), es.getInputTraceLocation());
     // test expected data size
     assertEquals("Mismatch in expected data size", 
@@ -275,7 +275,7 @@ public class TestGridmixSummary {
     es.finalize(factory, testTraceFile.toString(), 0L, resolver, dataStats, 
                 conf);
     // test missing expected data size
-    assertEquals("Mismatch in trace signature", 
+    assertEquals("Mismatch in trace data size", 
                  Summarizer.NA, es.getExpectedDataSize());
     assertFalse("Mismatch in trace signature", 
                 tid.equals(es.getInputTraceSignature()));
@@ -295,6 +295,12 @@ public class TestGridmixSummary {
     assertEquals("Mismatch in trace signature", 
                  tid, es.getInputTraceSignature());
     
+    // finalize trace identifier '-' input
+    es.finalize(factory, "-", 0L, resolver, dataStats, conf);
+    assertEquals("Mismatch in trace signature",
+                 Summarizer.NA, es.getInputTraceSignature());
+    assertEquals("Mismatch in trace file location", 
+                 Summarizer.NA, es.getInputTraceLocation());
   }
   
   // test the ExecutionSummarizer