HADOOP-12447. Clean up some htrace integration issues (cmccabe)

hadoop-common-project/hadoop-common/src/site/markdown/Tracing.md

@@ -85,8 +85,8 @@ You need to run the command against all servers if you want to update the config
 You need to specify the class name of span receiver as argument of `-class` option.
 You can specify the configuration associated with span receiver by `-Ckey=value` options.
 
-      $ hadoop trace -add -class LocalFileSpanReceiver -Cdfs.htrace.local-file-span-receiver.path=/tmp/htrace.out -host 192.168.56.2:9000
+      $ hadoop trace -add -class org.apache.htrace.core.LocalFileSpanReceiver -Chadoop.htrace.local.file.span.receiver.path=/tmp/htrace.out -host 192.168.56.2:9000
-      Added trace span receiver 2 with configuration dfs.htrace.local-file-span-receiver.path = /tmp/htrace.out
+      Added trace span receiver 2 with configuration hadoop.htrace.local.file.span.receiver.path = /tmp/htrace.out
 
       $ hadoop trace -list -host 192.168.56.2:9000
       ID  CLASS
@@ -137,8 +137,7 @@ which start tracing span before invoking HDFS shell command.
         FsShell shell = new FsShell();
         conf.setQuietMode(false);
         shell.setConf(conf);
-        Tracer tracer = new Tracer.Builder().
+        Tracer tracer = new Tracer.Builder("TracingFsShell").
-            name("TracingFsShell).
             conf(TraceUtils.wrapHadoopConf("tracing.fs.shell.htrace.", conf)).
             build();
         int res = 0;
@@ -177,15 +176,15 @@ ProbabilitySampler.
 
 ```xml
       <property>
-        <name>dfs.client.htrace.spanreceiver.classes</name>
+        <name>hadoop.htrace.span.receiver.classes</name>
         <value>LocalFileSpanReceiver</value>
       </property>
       <property>
-        <name>dfs.client.htrace.sampler</name>
+        <name>fs.client.htrace.sampler.classes</name>
         <value>ProbabilitySampler</value>
       </property>
       <property>
-        <name>dfs.client.htrace.sampler.fraction</name>
+        <name>fs.client.htrace.sampler.fraction</name>
-        <value>0.5</value>
+        <value>0.01</value>
       </property>
 ```

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/client/HdfsClientConfigKeys.java

@@ -149,8 +149,6 @@ public interface HdfsClientConfigKeys {
       "dfs.client.test.drop.namenode.response.number";
   int     DFS_CLIENT_TEST_DROP_NAMENODE_RESPONSE_NUM_DEFAULT = 0;
   String  DFS_CLIENT_LOCAL_INTERFACES = "dfs.client.local.interfaces";
-  // HDFS client HTrace configuration.
-  String  DFS_CLIENT_HTRACE_PREFIX = "dfs.client.htrace.";
   String  DFS_USER_HOME_DIR_PREFIX_KEY = "dfs.user.home.dir.prefix";
   String  DFS_USER_HOME_DIR_PREFIX_DEFAULT = "/user";
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java

@@ -64,9 +64,6 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
   public static final String DFS_WEBHDFS_ACL_PERMISSION_PATTERN_DEFAULT =
       HdfsClientConfigKeys.DFS_WEBHDFS_ACL_PERMISSION_PATTERN_DEFAULT;
 
-  public static final String DFS_CLIENT_HTRACE_SAMPLER_CLASSES =
-      "dfs.client.htrace.sampler.classes";
-
   // HA related configuration
   public static final String  DFS_DATANODE_RESTART_REPLICA_EXPIRY_KEY = "dfs.datanode.restart.replica.expiration";
   public static final long    DFS_DATANODE_RESTART_REPLICA_EXPIRY_DEFAULT = 50;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NameNodeRpcServer.java

@@ -419,7 +419,7 @@ class NameNodeRpcServer implements NamenodeProtocols {
         UnresolvedPathException.class);
     clientRpcServer.setTracer(nn.tracer);
     if (serviceRpcServer != null) {
-      clientRpcServer.setTracer(nn.tracer);
+      serviceRpcServer.setTracer(nn.tracer);
     }
  }
 

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NamenodeFsck.java

@@ -80,6 +80,7 @@ import org.apache.hadoop.net.NodeBase;
 import org.apache.hadoop.security.AccessControlException;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.security.token.Token;
+import org.apache.hadoop.tracing.TraceUtils;
 import org.apache.hadoop.util.Time;
 import org.apache.htrace.core.Tracer;
 
@@ -202,7 +203,9 @@ public class NamenodeFsck implements DataEncryptionKeyFactory {
     this.staleInterval =
         conf.getLong(DFSConfigKeys.DFS_NAMENODE_STALE_DATANODE_INTERVAL_KEY,
           DFSConfigKeys.DFS_NAMENODE_STALE_DATANODE_INTERVAL_DEFAULT);
-    this.tracer = new Tracer.Builder("NamenodeFsck").build();
+    this.tracer = new Tracer.Builder("NamenodeFsck").
+        conf(TraceUtils.wrapHadoopConf("namenode.fsck.htrace.", conf)).
+        build();
 
     for (Iterator<String> it = pmap.keySet().iterator(); it.hasNext();) {
       String key = it.next();

hadoop-hdfs-project/hadoop-hdfs/src/main/resources/hdfs-default.xml

@@ -2427,14 +2427,6 @@
   </description>
 </property>
 
-<property>
-  <name>dfs.client.htrace.sampler.classes</name>
-  <value></value>
-  <description>
-    The class names of the HTrace Samplers to use for the HDFS client.
-  </description>
-</property>
-
 <property>
   <name>dfs.ha.zkfc.nn.http.timeout.ms</name>
   <value>20000</value>

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockTokenWithDFS.java

@@ -33,6 +33,7 @@ import org.apache.hadoop.fs.CommonConfigurationKeys;
 import org.apache.hadoop.fs.FSDataInputStream;
 import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.FsTracer;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hdfs.BlockReader;
 import org.apache.hadoop.hdfs.BlockReaderFactory;
@@ -161,6 +162,7 @@ public class TestBlockTokenWithDFS {
           setCachingStrategy(CachingStrategy.newDefaultStrategy()).
           setClientCacheContext(ClientContext.getFromConf(conf)).
           setConfiguration(conf).
+          setTracer(FsTracer.get(conf)).
           setRemotePeerFactory(new RemotePeerFactory() {
             @Override
             public Peer newConnectedPeer(InetSocketAddress addr,

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDataNodeVolumeFailure.java

@@ -37,6 +37,7 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.conf.ReconfigurationException;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.FileUtil;
+import org.apache.hadoop.fs.FsTracer;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hdfs.BlockReader;
 import org.apache.hadoop.hdfs.BlockReaderFactory;
@@ -515,6 +516,7 @@ public class TestDataNodeVolumeFailure {
       setCachingStrategy(CachingStrategy.newDefaultStrategy()).
       setClientCacheContext(ClientContext.getFromConf(conf)).
       setConfiguration(conf).
+      setTracer(FsTracer.get(conf)).
       setRemotePeerFactory(new RemotePeerFactory() {
         @Override
         public Peer newConnectedPeer(InetSocketAddress addr,

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/tracing/TestTraceAdmin.java

@@ -73,10 +73,10 @@ public class TestTraceAdmin {
       Assert.assertEquals("ret:0, [no span receivers found]" + NEWLINE,
           runTraceCommand(trace, "-list", "-host", getHostPortForNN(cluster)));
       Assert.assertEquals("ret:0, Added trace span receiver 1 with " +
-          "configuration dfs.htrace.local-file-span-receiver.path = " + tracePath + NEWLINE,
+          "configuration hadoop.htrace.local.file.span.receiver.path = " + tracePath + NEWLINE,
           runTraceCommand(trace, "-add", "-host", getHostPortForNN(cluster),
               "-class", "org.apache.htrace.core.LocalFileSpanReceiver",
-              "-Cdfs.htrace.local-file-span-receiver.path=" + tracePath));
+              "-Chadoop.htrace.local.file.span.receiver.path=" + tracePath));
       String list =
           runTraceCommand(trace, "-list", "-host", getHostPortForNN(cluster));
       Assert.assertTrue(list.startsWith("ret:0"));
@@ -87,10 +87,10 @@ public class TestTraceAdmin {
       Assert.assertEquals("ret:0, [no span receivers found]" + NEWLINE,
           runTraceCommand(trace, "-list", "-host", getHostPortForNN(cluster)));
       Assert.assertEquals("ret:0, Added trace span receiver 2 with " +
-          "configuration dfs.htrace.local-file-span-receiver.path = " + tracePath + NEWLINE,
+          "configuration hadoop.htrace.local.file.span.receiver.path = " + tracePath + NEWLINE,
           runTraceCommand(trace, "-add", "-host", getHostPortForNN(cluster),
               "-class", "LocalFileSpanReceiver",
-              "-Cdfs.htrace.local-file-span-receiver.path=" + tracePath));
+              "-Chadoop.htrace.local.file.span.receiver.path=" + tracePath));
       Assert.assertEquals("ret:0, Removed trace span receiver 2" + NEWLINE,
           runTraceCommand(trace, "-remove", "2", "-host",
               getHostPortForNN(cluster)));