MAPREDUCE-3849. Change TokenCache's reading of the binary token file (Daryn Sharp via bobby)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1245099 13f79535-47bb-0310-9956-ffa450edef68

hadoop-mapreduce-project/CHANGES.txt

@@ -94,6 +94,9 @@ Release 0.23.2 - UNRELEASED
 
   IMPROVEMENTS
 
+    MAPREDUCE-3849. Change TokenCache's reading of the binary token file
+    (Daryn Sharp via bobby)
+
     MAPREDUCE-3854. Fixed and reenabled tests related to MR child JVM's
     environmental variables in TestMiniMRChildTask. (Tom White via vinodkv)
 

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/security/TokenCache.java

@@ -114,31 +114,10 @@ public class TokenCache {
       throw new IOException(
           "Can't get Master Kerberos principal for use as renewer");
     }
-    boolean readFile = true;
+    mergeBinaryTokens(credentials, conf);
 
     String fsName = fs.getCanonicalServiceName();
     if (TokenCache.getDelegationToken(credentials, fsName) == null) {
-      //TODO: Need to come up with a better place to put
-      //this block of code to do with reading the file
-      if (readFile) {
-        readFile = false;
-        String binaryTokenFilename =
-          conf.get(MRJobConfig.MAPREDUCE_JOB_CREDENTIALS_BINARY);
-        if (binaryTokenFilename != null) {
-          Credentials binary;
-          try {
-            binary = Credentials.readTokenStorageFile(
-                new Path("file:///" +  binaryTokenFilename), conf);
-          } catch (IOException e) {
-            throw new RuntimeException(e);
-          }
-          credentials.addAll(binary);
-        }
-        if (TokenCache.getDelegationToken(credentials, fsName) != null) {
-          LOG.debug("DT for " + fsName  + " is already present");
-          return;
-        }
-      }
       List<Token<?>> tokens =
           fs.getDelegationTokens(delegTokenRenewer, credentials);
       if (tokens != null) {
@@ -161,6 +140,22 @@ public class TokenCache {
     }
   }
 
+  private static void mergeBinaryTokens(Credentials creds, Configuration conf) {
+    String binaryTokenFilename =
+        conf.get(MRJobConfig.MAPREDUCE_JOB_CREDENTIALS_BINARY);
+    if (binaryTokenFilename != null) {
+      Credentials binary;
+      try {
+        binary = Credentials.readTokenStorageFile(
+            new Path("file:///" +  binaryTokenFilename), conf);
+      } catch (IOException e) {
+        throw new RuntimeException(e);
+      }
+      // supplement existing tokens with the tokens in the binary file
+      creds.mergeAll(binary);
+    }
+  }
+  
   /**
    * file name used on HDFS for generated job token
    */

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/test/java/org/apache/hadoop/mapreduce/security/TestTokenCache.java

@@ -21,23 +21,27 @@ package org.apache.hadoop.mapreduce.security;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
 import static org.mockito.Matchers.any;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
+import java.io.IOException;
 import java.net.URI;
 import java.util.LinkedList;
 import java.util.List;
 
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.mapred.Master;
 import org.apache.hadoop.mapreduce.MRJobConfig;
 import org.apache.hadoop.security.Credentials;
 import org.apache.hadoop.security.token.Token;
+import org.apache.hadoop.security.token.TokenIdentifier;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.junit.Test;
 import org.mockito.invocation.InvocationOnMock;
@@ -162,6 +166,91 @@ public class TestTokenCache {
     return mockFs;
   }
 
+  @Test
+  @SuppressWarnings("deprecation")
+  public void testBinaryCredentials() throws Exception {
+    Configuration conf = new Configuration();
+    conf.set(YarnConfiguration.RM_PRINCIPAL, "mapred/host@REALM");
+    String renewer = Master.getMasterPrincipal(conf);
+
+    Path TEST_ROOT_DIR =
+        new Path(System.getProperty("test.build.data","test/build/data"));
+    // ick, but need fq path minus file:/
+    String binaryTokenFile = FileSystem.getLocal(conf).makeQualified(
+        new Path(TEST_ROOT_DIR, "tokenFile")).toUri().getPath();
+
+    FileSystem fs1 = createFileSystemForService("service1");
+    FileSystem fs2 = createFileSystemForService("service2");
+    FileSystem fs3 = createFileSystemForService("service3");
+    
+    // get the tokens for fs1 & fs2 and write out to binary creds file
+    Credentials creds = new Credentials();
+    Token<?> token1 = fs1.getDelegationToken(renewer);
+    Token<?> token2 = fs2.getDelegationToken(renewer);
+    creds.addToken(token1.getService(), token1);
+    creds.addToken(token2.getService(), token2);
+    // wait to set, else the obtain tokens call above will fail with FNF
+    conf.set(MRJobConfig.MAPREDUCE_JOB_CREDENTIALS_BINARY, binaryTokenFile);
+    creds.writeTokenStorageFile(new Path(binaryTokenFile), conf);
+    
+    // re-init creds and add a newer token for fs1
+    creds = new Credentials();
+    Token<?> newerToken1 = fs1.getDelegationToken(renewer);
+    assertFalse(newerToken1.equals(token1));
+    creds.addToken(newerToken1.getService(), newerToken1);
+    checkToken(creds, newerToken1);
+    
+    // get token for fs1, see that fs2's token was loaded 
+    TokenCache.obtainTokensForNamenodesInternal(fs1, creds, conf);
+    checkToken(creds, newerToken1, token2);
+    
+    // get token for fs2, nothing should change since already present
+    TokenCache.obtainTokensForNamenodesInternal(fs2, creds, conf);
+    checkToken(creds, newerToken1, token2);
+    
+    // get token for fs3, should only add token for fs3
+    TokenCache.obtainTokensForNamenodesInternal(fs3, creds, conf);
+    Token<?> token3 = creds.getToken(new Text(fs3.getCanonicalServiceName()));
+    assertTrue(token3 != null);
+    checkToken(creds, newerToken1, token2, token3);
+    
+    // be paranoid, check one last time that nothing changes
+    TokenCache.obtainTokensForNamenodesInternal(fs1, creds, conf);
+    TokenCache.obtainTokensForNamenodesInternal(fs2, creds, conf);
+    TokenCache.obtainTokensForNamenodesInternal(fs3, creds, conf);
+    checkToken(creds, newerToken1, token2, token3);
+  }
+
+  private void checkToken(Credentials creds, Token<?> ... tokens) {
+    assertEquals(tokens.length, creds.getAllTokens().size());
+    for (Token<?> token : tokens) {
+      Token<?> credsToken = creds.getToken(token.getService());
+      assertTrue(credsToken != null);
+      assertEquals(token, credsToken);
+    }
+  }
+  
+  @SuppressWarnings("deprecation")
+  private FileSystem createFileSystemForService(final String service)
+      throws IOException {
+    FileSystem mockFs = mock(FileSystem.class);
+    when(mockFs.getCanonicalServiceName()).thenReturn(service);
+    when(mockFs.getDelegationToken(any(String.class))).thenAnswer(
+        new Answer<Token<?>>() {
+          int unique = 0;
+          @Override
+          public Token<?> answer(InvocationOnMock invocation) throws Throwable {
+            Token<?> token = new Token<TokenIdentifier>();
+            token.setService(new Text(service));
+            // use unique value so when we restore from token storage, we can
+            // tell if it's really the same token
+            token.setKind(new Text("token" + unique++));
+            return token;
+          }
+        });
+    return mockFs;
+  }
+
   @Test
   public void testCleanUpTokenReferral() throws Exception {
     Configuration conf = new Configuration();