YARN-2724. Skipped uploading a local log file to HDFS if exception is raised when opening it. Contributed by Xuan Gong.

hadoop-yarn-project/CHANGES.txt

@@ -733,6 +733,9 @@ Release 2.6.0 - UNRELEASED
 
     YARN-2732. Fixed syntax error in SecureContainer.apt.vm. (Jian He via zjshen)
 
+    YARN-2724. Skipped uploading a local log file to HDFS if exception is raised
+    when opening it. (Xuan Gong via zjshen)
+
 Release 2.5.1 - 2014-09-05
 
   INCOMPATIBLE CHANGES

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/AggregatedLogFormat.java

@@ -69,6 +69,7 @@
 import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
 import org.apache.hadoop.yarn.util.ConverterUtils;
 
+import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Predicate;
 import com.google.common.collect.Iterables;
 import com.google.common.collect.Sets;
@@ -211,6 +212,16 @@ public void write(DataOutputStream out, Set<File> pendingUploadFiles)
       Collections.sort(fileList);
 
       for (File logFile : fileList) {
+
+        FileInputStream in = null;
+        try {
+          in = secureOpenFile(logFile);
+        } catch (IOException e) {
+          logErrorMessage(logFile, e);
+          IOUtils.cleanup(LOG, in);
+          continue;
+        }
+
         final long fileLength = logFile.length();
         // Write the logFile Type
         out.writeUTF(logFile.getName());
@@ -219,9 +230,7 @@ public void write(DataOutputStream out, Set<File> pendingUploadFiles)
         out.writeUTF(String.valueOf(fileLength));
 
         // Write the log itself
-        FileInputStream in = null;
         try {
-          in = SecureIOUtils.openForRead(logFile, getUser(), null);
           byte[] buf = new byte[65535];
           int len = 0;
           long bytesLeft = fileLength;
@@ -244,16 +253,24 @@ public void write(DataOutputStream out, Set<File> pendingUploadFiles)
           }
           this.uploadedFiles.add(logFile);
         } catch (IOException e) {
-          String message = "Error aggregating log file. Log file : "
-              + logFile.getAbsolutePath() + e.getMessage();
-          LOG.error(message, e);
+          String message = logErrorMessage(logFile, e);
           out.write(message.getBytes());
         } finally {
-          if (in != null) {
-            in.close();
+          IOUtils.cleanup(LOG, in);
         }
       }
     }
+
+    @VisibleForTesting
+    public FileInputStream secureOpenFile(File logFile) throws IOException {
+      return SecureIOUtils.openForRead(logFile, getUser(), null);
+    }
+
+    private static String logErrorMessage(File logFile, Exception e) {
+      String message = "Error aggregating log file. Log file : "
+          + logFile.getAbsolutePath() + ". " + e.getMessage();
+      LOG.error(message, e);
+      return message;
     }
 
     // Added for testing purpose.

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/test/java/org/apache/hadoop/yarn/logaggregation/TestAggregatedLogFormat.java

@@ -20,6 +20,7 @@
 
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.when;
+import static org.mockito.Mockito.doThrow;
 
 import java.io.BufferedReader;
 import java.io.DataInputStream;
@@ -37,7 +38,6 @@
 import java.util.concurrent.CountDownLatch;
 
 import org.junit.Assert;
-
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
@@ -194,6 +194,8 @@ public void testReadAcontainerLogs1() throws Exception {
 
     int numChars = 80000;
 
+    // create file stderr and stdout in containerLogDir
+    writeSrcFile(srcFilePath, "stderr", numChars);
     writeSrcFile(srcFilePath, "stdout", numChars);
 
     UserGroupInformation ugi = UserGroupInformation.getCurrentUser();
@@ -204,7 +206,14 @@ public void testReadAcontainerLogs1() throws Exception {
         new LogValue(Collections.singletonList(srcFileRoot.toString()),
             testContainerId, ugi.getShortUserName());
 
-    logWriter.append(logKey, logValue);
+    // When we try to open FileInputStream for stderr, it will throw out an IOException.
+    // Skip the log aggregation for stderr.
+    LogValue spyLogValue = spy(logValue);
+    File errorFile = new File((new Path(srcFilePath, "stderr")).toString());
+    doThrow(new IOException("Mock can not open FileInputStream")).when(
+      spyLogValue).secureOpenFile(errorFile);
+
+    logWriter.append(logKey, spyLogValue);
     logWriter.close();
 
     // make sure permission are correct on the file
@@ -218,11 +227,15 @@ public void testReadAcontainerLogs1() throws Exception {
     Writer writer = new StringWriter();
     LogReader.readAcontainerLogs(dis, writer);
     
+    // We should only do the log aggregation for stdout.
+    // Since we could not open the fileInputStream for stderr, this file is not
+    // aggregated.
     String s = writer.toString();
     int expectedLength =
         "\n\nLogType:stdout".length() + ("\nLogLength:" + numChars).length()
             + "\nLog Contents:\n".length() + numChars;
     Assert.assertTrue("LogType not matched", s.contains("LogType:stdout"));
+    Assert.assertTrue("log file:stderr should not be aggregated.", !s.contains("LogType:stderr"));
     Assert.assertTrue("LogLength not matched", s.contains("LogLength:" + numChars));
     Assert.assertTrue("Log Contents not matched", s.contains("Log Contents"));