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From vvasu...@apache.org
Subject [04/50] hadoop git commit: YARN-4913. Yarn logs should take a -out option to write to a directory. Contributed by Xuan Gong.
Date Wed, 25 May 2016 16:58:00 GMT
YARN-4913. Yarn logs should take a -out option to write to a directory. Contributed by Xuan Gong.


Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/ef175779
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/ef175779
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/ef175779

Branch: refs/heads/YARN-4757
Commit: ef1757790d89cc72f88f5330761b1c8901c59e94
Parents: bad85f3
Author: Varun Vasudev <vvasudev@apache.org>
Authored: Wed May 18 22:44:33 2016 +0530
Committer: Varun Vasudev <vvasudev@apache.org>
Committed: Wed May 18 22:44:33 2016 +0530

----------------------------------------------------------------------
 .../apache/hadoop/yarn/client/cli/LogsCLI.java  | 391 +++++++++++--------
 .../hadoop/yarn/client/cli/TestLogsCLI.java     | 106 ++++-
 .../yarn/logaggregation/LogCLIHelpers.java      | 128 ++++--
 3 files changed, 419 insertions(+), 206 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/hadoop/blob/ef175779/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/LogsCLI.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/LogsCLI.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/LogsCLI.java
index 1ac4d61..039ba3c 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/LogsCLI.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/main/java/org/apache/hadoop/yarn/client/cli/LogsCLI.java
@@ -19,6 +19,7 @@
 package org.apache.hadoop.yarn.client.cli;
 
 import java.io.IOException;
+import java.io.PrintStream;
 import java.io.StringReader;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -81,15 +82,13 @@ public class LogsCLI extends Configured implements Tool {
   private static final String CONTAINER_LOG_FILES = "logFiles";
   private static final String SHOW_META_INFO = "show_meta_info";
   private static final String LIST_NODES_OPTION = "list_nodes";
+  private static final String OUT_OPTION = "out";
   public static final String HELP_CMD = "help";
 
   @Override
   public int run(String[] args) throws Exception {
-
     Options opts = createCommandOpts();
-
     Options printOpts = createPrintOpts(opts);
-
     if (args.length < 1) {
       printHelpMessage(printOpts);
       return -1;
@@ -108,6 +107,7 @@ public class LogsCLI extends Configured implements Tool {
     boolean nodesList = false;
     String[] logFiles = null;
     List<String> amContainersList = new ArrayList<String>();
+    String localDir = null;
     try {
       CommandLine commandLine = parser.parse(opts, args, true);
       appIdStr = commandLine.getOptionValue(APPLICATION_ID_OPTION);
@@ -117,6 +117,7 @@ public class LogsCLI extends Configured implements Tool {
       getAMContainerLogs = commandLine.hasOption(AM_CONTAINER_OPTION);
       showMetaInfo = commandLine.hasOption(SHOW_META_INFO);
       nodesList = commandLine.hasOption(LIST_NODES_OPTION);
+      localDir = commandLine.getOptionValue(OUT_OPTION);
       if (getAMContainerLogs) {
         try {
           amContainersList = parseAMContainer(commandLine, printOpts);
@@ -151,7 +152,6 @@ public class LogsCLI extends Configured implements Tool {
     LogCLIHelpers logCliHelper = new LogCLIHelpers();
     logCliHelper.setConf(getConf());
 
-    boolean appStateObtainedSuccessfully = true;
     YarnApplicationState appState = YarnApplicationState.NEW;
     ApplicationReport appReport = null;
     try {
@@ -164,7 +164,9 @@ public class LogsCLI extends Configured implements Tool {
         return -1;
       }
     } catch (IOException | YarnException e) {
-      appStateObtainedSuccessfully = false;
+      // If we can not get appReport from either RM or ATS
+      // We will assume that this app has already finished.
+      appState = YarnApplicationState.FINISHED;
       System.err.println("Unable to get ApplicationState."
           + " Attempting to fetch logs directly from the filesystem.");
     }
@@ -179,19 +181,22 @@ public class LogsCLI extends Configured implements Tool {
       }
     }
 
+    ContainerLogsRequest request = new ContainerLogsRequest(appId,
+        isApplicationFinished(appState), appOwner,
+        nodeAddress, null, containerIdStr);
+
     if (showMetaInfo) {
-      return showMetaInfo(appState, appStateObtainedSuccessfully,
-          logCliHelper, appId, containerIdStr, nodeAddress, appOwner);
+      return showMetaInfo(request, logCliHelper);
     }
 
     if (nodesList) {
-      return showNodeLists(appState, appStateObtainedSuccessfully,
-          logCliHelper, appId, appOwner);
+      return showNodeLists(request, logCliHelper);
     }
+
     // To get am logs
     if (getAMContainerLogs) {
-      return fetchAMContainerLogs(logFiles, appState, appId, appOwner,
-          amContainersList, logCliHelper);
+      return fetchAMContainerLogs(request, amContainersList,
+          logFiles, logCliHelper, localDir);
     }
 
     int resultCode = 0;
@@ -203,16 +208,12 @@ public class LogsCLI extends Configured implements Tool {
             + " does not have the container:" + containerId);
         return -1;
       }
-      return fetchContainerLogs(appState, appStateObtainedSuccessfully,
-          logFiles, appOwner, nodeAddress, containerId, logCliHelper);
+      return fetchContainerLogs(request, logFiles,
+          logCliHelper, localDir);
     } else {
       if (nodeAddress == null) {
-        resultCode =
-            logCliHelper.dumpAllContainersLogs(appId, appOwner, System.out);
-        if (resultCode == -1) {
-          System.err.println("Can not find the logs for the application: "
-              + appId + " with the appOwner: " + appOwner);
-        }
+        resultCode = fetchApplicationLogs(appId, appOwner,
+            logCliHelper, localDir);
       } else {
         System.err.println("Should at least provide ContainerId!");
         printHelpMessage(printOpts);
@@ -351,69 +352,74 @@ public class LogsCLI extends Configured implements Tool {
   }
 
   private void printContainerLogsFromRunningApplication(Configuration conf,
-      ContainerId containerId, String nodeHttpAddress,
-      String nodeId, String[] logFiles, LogCLIHelpers logCliHelper,
-      String appOwner) throws IOException {
-    String appId = containerId.getApplicationAttemptId()
-        .getApplicationId().toString();
-    String containerIdStr = containerId.toString();
+      ContainerLogsRequest request, String[] logFiles,
+      LogCLIHelpers logCliHelper, String localDir) throws IOException {
+    String appId = request.getAppId().toString();
+    String containerIdStr = request.getContainerId().toString();
     String[] requestedLogFiles = logFiles;
-    // fetch all the log files for the container
-    if (fetchAllLogFiles(logFiles)) {
-      requestedLogFiles =
-          getContainerLogFiles(getConf(), containerIdStr, nodeHttpAddress);
-    }
-    Client webServiceClient = Client.create();
-    String containerString = "\n\nContainer: " + containerIdStr;
-    System.out.println(containerString);
-    System.out.println(StringUtils.repeat("=", containerString.length()));
-
-    for (String logFile : requestedLogFiles) {
-      System.out.println("LogType:" + logFile);
-      System.out.println("Log Upload Time:"
-          + Times.format(System.currentTimeMillis()));
-      System.out.println("Log Contents:");
-      try {
-        WebResource webResource =
-            webServiceClient.resource(WebAppUtils.getHttpSchemePrefix(conf)
-                + nodeHttpAddress);
-        ClientResponse response =
-            webResource.path("ws").path("v1").path("node")
-              .path("containerlogs").path(containerIdStr).path(logFile)
-              .accept(MediaType.TEXT_PLAIN).get(ClientResponse.class);
-        System.out.println(response.getEntity(String.class));
-        System.out.println("End of LogType:" + logFile);
-      } catch (ClientHandlerException | UniformInterfaceException ex) {
-        System.err.println("Can not find the log file:" + logFile
-            + " for the container:" + containerIdStr + " in NodeManager:"
-            + nodeId);
+    String nodeHttpAddress = request.getNodeHttpAddress();
+    String nodeId = request.getNodeId();
+    String appOwner = request.getAppOwner();
+    PrintStream out = logCliHelper.createPrintStream(localDir, nodeId,
+        containerIdStr);
+    try {
+      // fetch all the log files for the container
+      if (fetchAllLogFiles(logFiles)) {
+        requestedLogFiles =
+            getContainerLogFiles(getConf(), containerIdStr, nodeHttpAddress);
+      }
+      Client webServiceClient = Client.create();
+      String containerString = "\n\nContainer: " + containerIdStr;
+      out.println(containerString);
+      out.println(StringUtils.repeat("=", containerString.length()));
+
+      for (String logFile : requestedLogFiles) {
+        out.println("LogType:" + logFile);
+        out.println("Log Upload Time:"
+            + Times.format(System.currentTimeMillis()));
+        out.println("Log Contents:");
+        try {
+          WebResource webResource =
+              webServiceClient.resource(WebAppUtils.getHttpSchemePrefix(conf)
+                  + nodeHttpAddress);
+          ClientResponse response =
+              webResource.path("ws").path("v1").path("node")
+                .path("containerlogs").path(containerIdStr).path(logFile)
+                .accept(MediaType.TEXT_PLAIN).get(ClientResponse.class);
+          out.println(response.getEntity(String.class));
+          out.println("End of LogType:" + logFile);
+          out.flush();
+        } catch (ClientHandlerException | UniformInterfaceException ex) {
+          System.err.println("Can not find the log file:" + logFile
+              + " for the container:" + containerIdStr + " in NodeManager:"
+              + nodeId);
+        }
       }
+    } finally {
+      logCliHelper.closePrintStream(out);
     }
     // for the case, we have already uploaded partial logs in HDFS
     logCliHelper.dumpAContainersLogsForALogType(appId, containerIdStr, nodeId,
-        appOwner, Arrays.asList(requestedLogFiles), false);
+        appOwner, Arrays.asList(requestedLogFiles), false, localDir);
   }
 
-  private void printContainerLogsForFinishedApplication(String appId,
-      String containerId, String nodeAddress, String[] logFiles,
-      LogCLIHelpers logCliHelper, String appOwner) throws IOException {
-    String containerString = "\n\nContainer: " + containerId;
-    System.out.println(containerString);
-    System.out.println(StringUtils.repeat("=", containerString.length()));
-    logCliHelper.dumpAContainersLogsForALogType(appId, containerId,
-        nodeAddress, appOwner, logFiles != null ? Arrays.asList(logFiles)
-        : null);
+  private void printContainerLogsForFinishedApplication(
+      ContainerLogsRequest request, String[] logFiles,
+      LogCLIHelpers logCliHelper, String localDir)
+      throws IOException {
+    logCliHelper.dumpAContainersLogsForALogType(request.getAppId().toString(),
+        request.getContainerId().toString(), request.getNodeId(),
+        request.getAppOwner(), logFiles != null ? Arrays.asList(logFiles)
+        : null, localDir);
   }
 
   private int printContainerLogsForFinishedApplicationWithoutNodeId(
       String appId, String containerId, String[] logFiles,
-      LogCLIHelpers logCliHelper, String appOwner) throws IOException {
-    String containerString = "\n\nContainer: " + containerId;
-    System.out.println(containerString);
-    System.out.println(StringUtils.repeat("=", containerString.length()));
+      LogCLIHelpers logCliHelper, String appOwner, String localDir)
+      throws IOException {
     return logCliHelper.dumpAContainersLogsForALogTypeWithoutNodeId(appId,
         containerId, appOwner, logFiles != null ?
-        Arrays.asList(logFiles) : null);
+        Arrays.asList(logFiles) : null, localDir);
   }
 
   private ContainerReport getContainerReport(String containerIdStr)
@@ -433,36 +439,41 @@ public class LogsCLI extends Configured implements Tool {
         || appState == YarnApplicationState.KILLED; 
   }
 
-  private int printAMContainerLogs(Configuration conf, String appId,
-      List<String> amContainers, String[] logFiles, LogCLIHelpers logCliHelper,
-      String appOwner, boolean applicationFinished) throws Exception {
+  private int printAMContainerLogs(Configuration conf,
+      ContainerLogsRequest request, List<String> amContainers,
+      String[] logFiles, LogCLIHelpers logCliHelper, String localDir)
+      throws Exception {
     List<JSONObject> amContainersList = null;
-    List<AMLogsRequest> requests = new ArrayList<AMLogsRequest>();
+    List<ContainerLogsRequest> requests =
+        new ArrayList<ContainerLogsRequest>();
     boolean getAMContainerLists = false;
+    String appId = request.getAppId().toString();
     String errorMessage = "";
     try {
       amContainersList = getAMContainerInfoForRMWebService(conf, appId);
       if (amContainersList != null && !amContainersList.isEmpty()) {
         getAMContainerLists = true;
         for (JSONObject amContainer : amContainersList) {
-          AMLogsRequest request = new AMLogsRequest(applicationFinished);
-          request.setAmContainerId(amContainer.getString("containerId"));
-          request.setNodeHttpAddress(amContainer.getString("nodeHttpAddress"));
-          request.setNodeId(amContainer.getString("nodeId"));
-          requests.add(request);
+          ContainerLogsRequest amRequest = new ContainerLogsRequest(request);
+          amRequest.setContainerId(amContainer.getString("containerId"));
+          amRequest.setNodeHttpAddress(
+              amContainer.getString("nodeHttpAddress"));
+          amRequest.setNodeId(amContainer.getString("nodeId"));
+          requests.add(amRequest);
         }
       }
     } catch (Exception ex) {
       errorMessage = ex.getMessage();
-      if (applicationFinished) {
+      if (request.isAppFinished()) {
         try {
           amContainersList = getAMContainerInfoForAHSWebService(conf, appId);
           if (amContainersList != null && !amContainersList.isEmpty()) {
             getAMContainerLists = true;
             for (JSONObject amContainer : amContainersList) {
-              AMLogsRequest request = new AMLogsRequest(applicationFinished);
-              request.setAmContainerId(amContainer.getString("amContainerId"));
-              requests.add(request);
+              ContainerLogsRequest amRequest = new ContainerLogsRequest(
+                  request);
+              amRequest.setContainerId(amContainer.getString("amContainerId"));
+              requests.add(amRequest);
             }
           }
         } catch (Exception e) {
@@ -479,9 +490,9 @@ public class LogsCLI extends Configured implements Tool {
     }
 
     if (amContainers.contains("ALL")) {
-      for (AMLogsRequest request : requests) {
-        outputAMContainerLogs(request, conf, appId, logFiles, logCliHelper,
-            appOwner);
+      for (ContainerLogsRequest amRequest : requests) {
+        outputAMContainerLogs(amRequest, conf, logFiles,
+            logCliHelper, localDir);
       }
       System.out.println();      
       System.out.println("Specified ALL for -am option. "
@@ -490,12 +501,12 @@ public class LogsCLI extends Configured implements Tool {
       for (String amContainer : amContainers) {
         int amContainerId = Integer.parseInt(amContainer.trim());
         if (amContainerId == -1) {
-          outputAMContainerLogs(requests.get(requests.size() - 1), conf, appId,
-              logFiles, logCliHelper, appOwner);
+          outputAMContainerLogs(requests.get(requests.size() - 1), conf,
+              logFiles, logCliHelper, localDir);
         } else {
           if (amContainerId <= requests.size()) {
-            outputAMContainerLogs(requests.get(amContainerId - 1), conf, appId,
-                logFiles, logCliHelper, appOwner);
+            outputAMContainerLogs(requests.get(amContainerId - 1), conf,
+                logFiles, logCliHelper, localDir);
           }
         }
       }
@@ -503,11 +514,11 @@ public class LogsCLI extends Configured implements Tool {
     return 0;
   }
 
-  private void outputAMContainerLogs(AMLogsRequest request, Configuration conf,
-      String appId, String[] logFiles, LogCLIHelpers logCliHelper,
-      String appOwner) throws Exception {
+  private void outputAMContainerLogs(ContainerLogsRequest request,
+      Configuration conf, String[] logFiles,
+      LogCLIHelpers logCliHelper, String localDir) throws Exception {
     String nodeHttpAddress = request.getNodeHttpAddress();
-    String containerId = request.getAmContainerId();
+    String containerId = request.getContainerId();
     String nodeId = request.getNodeId();
 
     if (request.isAppFinished()) {
@@ -516,6 +527,7 @@ public class LogsCLI extends Configured implements Tool {
           try {
             nodeId =
                 getContainerReport(containerId).getAssignedNode().toString();
+            request.setNodeId(nodeId);
           } catch (Exception ex) {
             System.err.println(ex);
             nodeId = null;
@@ -526,8 +538,8 @@ public class LogsCLI extends Configured implements Tool {
           if(!fetchAllLogFiles(logFiles)) {
             requestedLogFilesList = logFiles;
           }
-          printContainerLogsForFinishedApplication(appId, containerId, nodeId,
-              requestedLogFilesList, logCliHelper, appOwner);
+          printContainerLogsForFinishedApplication(request,
+              requestedLogFilesList, logCliHelper, localDir);
         }
       }
     } else {
@@ -540,36 +552,34 @@ public class LogsCLI extends Configured implements Tool {
               getContainerLogFiles(getConf(), containerId, nodeHttpAddress);
         }
         printContainerLogsFromRunningApplication(conf,
-            ContainerId.fromString(containerId), nodeHttpAddress, nodeId,
-            requestedLogFiles, logCliHelper, appOwner);
+            request, requestedLogFiles, logCliHelper, localDir);
       }
     }
   }
 
-  private int showMetaInfo(YarnApplicationState appState,
-      boolean appStateObtainedSuccessfully, LogCLIHelpers logCliHelper,
-      ApplicationId appId, String containerIdStr, String nodeAddress,
-      String appOwner) throws IOException {
-    if (!isApplicationFinished(appState) && appStateObtainedSuccessfully) {
+  private int showMetaInfo(ContainerLogsRequest request,
+      LogCLIHelpers logCliHelper) throws IOException {
+    if (!request.isAppFinished()) {
       System.err.println("The -show_meta_info command can be only used "
           + "with finished applications");
       return -1;
     } else {
-      logCliHelper.printLogMetadata(appId, containerIdStr, nodeAddress,
-          appOwner, System.out, System.err);
+      logCliHelper.printLogMetadata(request.getAppId(),
+          request.getContainerId(), request.getNodeId(),
+          request.getAppOwner(), System.out, System.err);
       return 0;
     }
   }
 
-  private int showNodeLists(YarnApplicationState appState,
-      boolean appStateObtainedSuccessfully, LogCLIHelpers logCliHelper,
-      ApplicationId appId, String appOwner) throws IOException {
-    if (!isApplicationFinished(appState) && appStateObtainedSuccessfully) {
+  private int showNodeLists(ContainerLogsRequest request,
+      LogCLIHelpers logCliHelper) throws IOException {
+    if (!request.isAppFinished()) {
       System.err.println("The -list_nodes command can be only used with "
           + "finished applications");
       return -1;
     } else {
-      logCliHelper.printNodesList(appId, appOwner, System.out, System.err);
+      logCliHelper.printNodesList(request.getAppId(), request.getAppOwner(),
+          System.out, System.err);
       return 0;
     }
   }
@@ -619,11 +629,15 @@ public class LogsCLI extends Configured implements Tool {
     opts.addOption(LIST_NODES_OPTION, false,
         "Show the list of nodes that successfully aggregated logs. "
         + "This option can only be used with finished applications.");
+    opts.addOption(OUT_OPTION, true, "Local directory for storing individual "
+        + "container logs. The container logs will be stored based on the "
+        + "node the container ran on.");
     opts.getOption(APPLICATION_ID_OPTION).setArgName("Application ID");
     opts.getOption(CONTAINER_ID_OPTION).setArgName("Container ID");
     opts.getOption(NODE_ADDRESS_OPTION).setArgName("Node Address");
     opts.getOption(APP_OWNER_OPTION).setArgName("Application Owner");
     opts.getOption(AM_CONTAINER_OPTION).setArgName("AM Containers");
+    opts.getOption(OUT_OPTION).setArgName("Local Directory");
     return opts;
   }
 
@@ -637,6 +651,7 @@ public class LogsCLI extends Configured implements Tool {
     printOpts.addOption(commandOpts.getOption(CONTAINER_LOG_FILES));
     printOpts.addOption(commandOpts.getOption(SHOW_META_INFO));
     printOpts.addOption(commandOpts.getOption(LIST_NODES_OPTION));
+    printOpts.addOption(commandOpts.getOption(OUT_OPTION));
     return printOpts;
   }
 
@@ -671,10 +686,9 @@ public class LogsCLI extends Configured implements Tool {
     return amContainersList;
   }
 
-  private int fetchAMContainerLogs(String[] logFiles,
-      YarnApplicationState appState, ApplicationId appId,
-      String appOwner, List<String> amContainersList,
-      LogCLIHelpers logCliHelper) throws Exception {
+  private int fetchAMContainerLogs(ContainerLogsRequest request,
+      List<String> amContainersList, String[] logFiles,
+      LogCLIHelpers logCliHelper, String localDir) throws Exception {
     // if we do not specify the value for CONTAINER_LOG_FILES option,
     // we will only output syslog
     if (logFiles == null || logFiles.length == 0) {
@@ -685,10 +699,9 @@ public class LogsCLI extends Configured implements Tool {
     // and containerId for all the AM Containers.
     // After that, we will call NodeManager webService to get the
     // related logs
-    if (appState == YarnApplicationState.ACCEPTED
-        || appState == YarnApplicationState.RUNNING) {
-      return printAMContainerLogs(getConf(), appId.toString(), amContainersList,
-        logFiles, logCliHelper, appOwner, false);
+    if (!request.isAppFinished()) {
+      return printAMContainerLogs(getConf(), request, amContainersList,
+          logFiles, logCliHelper, localDir);
     } else {
       // If the application is in the final state, we will call RM webservice
       // to get all AppAttempts information first. If we get nothing,
@@ -698,9 +711,11 @@ public class LogsCLI extends Configured implements Tool {
       // to get logs from HDFS directly.
       if (getConf().getBoolean(YarnConfiguration.APPLICATION_HISTORY_ENABLED,
           YarnConfiguration.DEFAULT_APPLICATION_HISTORY_ENABLED)) {
-        return printAMContainerLogs(getConf(), appId.toString(),
-            amContainersList, logFiles, logCliHelper, appOwner, true);
+        return printAMContainerLogs(getConf(), request, amContainersList,
+            logFiles, logCliHelper, localDir);
       } else {
+        ApplicationId appId = request.getAppId();
+        String appOwner = request.getAppOwner();
         System.err.println("Can not get AMContainers logs for "
             + "the application:" + appId + " with the appOwner:" + appOwner);
         System.err.println("This application:" + appId + " has finished."
@@ -713,18 +728,18 @@ public class LogsCLI extends Configured implements Tool {
     }
   }
 
-  private int fetchContainerLogs(YarnApplicationState appState,
-      boolean appStateObtainedSuccessfully, String[] logFiles,
-      String appOwner, String nodeAddress,
-      ContainerId containerId, LogCLIHelpers logCliHelper) throws IOException {
+  private int fetchContainerLogs(ContainerLogsRequest request,
+      String[] logFiles, LogCLIHelpers logCliHelper, String localDir)
+      throws IOException {
     int resultCode = 0;
-    String appIdStr = containerId.getApplicationAttemptId()
-        .getApplicationId().toString();
-    String containerIdStr = containerId.toString();
+    String appIdStr = request.getAppId().toString();
+    String containerIdStr = request.getContainerId();
+    String nodeAddress = request.getNodeId();
+    String appOwner = request.getAppOwner();
+    boolean isAppFinished = request.isAppFinished();
     // if we provide the node address and the application is in the final
     // state, we could directly get logs from HDFS.
-    if (nodeAddress != null && (!appStateObtainedSuccessfully ||
-        isApplicationFinished(appState))) {
+    if (nodeAddress != null && isAppFinished) {
       // if user specified "ALL" as the logFiles param, pass null
       // to logCliHelper so that it fetches all the logs
       List<String> logs;
@@ -736,7 +751,7 @@ public class LogsCLI extends Configured implements Tool {
         logs = Arrays.asList(logFiles);
       }
       return logCliHelper.dumpAContainersLogsForALogType(appIdStr,
-          containerIdStr, nodeAddress, appOwner, logs);
+          containerIdStr, nodeAddress, appOwner, logs, localDir);
     }
     String nodeHttpAddress = null;
     String nodeId = null;
@@ -749,16 +764,18 @@ public class LogsCLI extends Configured implements Tool {
           report.getNodeHttpAddress().replaceFirst(
             WebAppUtils.getHttpSchemePrefix(getConf()), "");
       nodeId = report.getAssignedNode().toString();
+      request.setNodeId(nodeId);
+      request.setNodeHttpAddress(nodeHttpAddress);
     } catch (IOException | YarnException ex) {
-      if (!appStateObtainedSuccessfully || isApplicationFinished(appState)) {
+      if (isAppFinished) {
         String[] requestedLogFiles = logFiles;
         if(fetchAllLogFiles(logFiles)) {
           requestedLogFiles = null;
         }
         return printContainerLogsForFinishedApplicationWithoutNodeId(
             appIdStr, containerIdStr, requestedLogFiles, logCliHelper,
-            appOwner);
-      } else if (!isApplicationFinished(appState)) {
+            appOwner, localDir);
+      } else {
         System.err.println("Unable to get logs for this container:"
             + containerIdStr + "for the application:" + appIdStr
             + " with the appOwner: " + appOwner);
@@ -772,12 +789,12 @@ public class LogsCLI extends Configured implements Tool {
     // If the application is not in the final state,
     // we will provide the NodeHttpAddress and get the container logs
     // by calling NodeManager webservice.
-    if (!isApplicationFinished(appState)) {
+    if (!isAppFinished) {
       if (logFiles == null || logFiles.length == 0) {
         logFiles = new String[] {"syslog"};
       }
-      printContainerLogsFromRunningApplication(getConf(), containerId,
-          nodeHttpAddress, nodeId, logFiles, logCliHelper, appOwner);
+      printContainerLogsFromRunningApplication(getConf(), request,
+          logFiles, logCliHelper, localDir);
     } else {
       String[] requestedLogFiles = logFiles;
       if(fetchAllLogFiles(logFiles)) {
@@ -785,39 +802,95 @@ public class LogsCLI extends Configured implements Tool {
       }
       // If the application is in the final state, we will directly
       // get the container logs from HDFS.
-      printContainerLogsForFinishedApplication(appIdStr, containerIdStr,
-          nodeId, requestedLogFiles, logCliHelper, appOwner);
+      printContainerLogsForFinishedApplication(request,
+          requestedLogFiles, logCliHelper, localDir);
     }
     return resultCode;
   }
 
-  private static class AMLogsRequest {
-    private String amContainerId;
+  private int fetchApplicationLogs(ApplicationId appId, String appOwner,
+      LogCLIHelpers logCliHelper, String localDir) throws IOException {
+    int resultCode =
+        logCliHelper.dumpAllContainersLogs(appId, appOwner, localDir);
+    if (resultCode == -1) {
+      System.err.println("Can not find the logs for the application: "
+          + appId + " with the appOwner: " + appOwner);
+    }
+    return resultCode;
+  }
+
+  private String guessAppOwner(ApplicationReport appReport,
+      ApplicationId appId) throws IOException {
+    String appOwner = null;
+    if (appReport != null) {
+      //always use the app owner from the app report if possible
+      appOwner = appReport.getUser();
+    } else {
+      appOwner = UserGroupInformation.getCurrentUser().getShortUserName();
+      appOwner = LogCLIHelpers.getOwnerForAppIdOrNull(
+          appId, appOwner, getConf());
+    }
+    return appOwner;
+  }
+
+  private static class ContainerLogsRequest {
+    private ApplicationId appId;
+    private String containerId;
     private String nodeId;
     private String nodeHttpAddress;
-    private final boolean isAppFinished;
+    private String appOwner;
+    private boolean appFinished;
+
+    public ContainerLogsRequest(ContainerLogsRequest request) {
+      this.setAppId(request.getAppId());
+      this.setAppFinished(request.isAppFinished());
+      this.setAppOwner(request.getAppOwner());
+      this.setNodeId(request.getNodeId());
+      this.setNodeHttpAddress(request.getNodeHttpAddress());
+      this.setContainerId(request.getContainerId());
+    }
+
+    public ContainerLogsRequest(ApplicationId applicationId,
+        boolean isAppFinished, String owner,
+        String address, String httpAddress, String container) {
+      this.setAppId(applicationId);
+      this.setAppFinished(isAppFinished);
+      this.setAppOwner(owner);
+      this.setNodeId(address);
+      this.setNodeHttpAddress(httpAddress);
+      this.setContainerId(container);
+    }
 
-    AMLogsRequest(boolean isAppFinished) {
-      this.isAppFinished = isAppFinished;
-      this.setAmContainerId("");
-      this.setNodeId("");
-      this.setNodeHttpAddress("");
+    public ApplicationId getAppId() {
+      return appId;
     }
 
-    public String getAmContainerId() {
-      return amContainerId;
+    public void setAppId(ApplicationId appId) {
+      this.appId = appId;
     }
 
-    public void setAmContainerId(String amContainerId) {
-      this.amContainerId = amContainerId;
+    public String getContainerId() {
+      return containerId;
+    }
+
+    public void setContainerId(String containerId) {
+      this.containerId = containerId;
     }
 
     public String getNodeId() {
       return nodeId;
     }
 
-    public void setNodeId(String nodeId) {
-      this.nodeId = nodeId;
+    public void setNodeId(String nodeAddress) {
+      this.nodeId = nodeAddress;
+    }
+
+    public String getAppOwner() {
+      return appOwner;
+    }
+
+    public void setAppOwner(String appOwner) {
+      this.appOwner = appOwner;
     }
 
     public String getNodeHttpAddress() {
@@ -829,21 +902,11 @@ public class LogsCLI extends Configured implements Tool {
     }
 
     public boolean isAppFinished() {
-      return isAppFinished;
+      return appFinished;
     }
-  }
 
-  private String guessAppOwner(ApplicationReport appReport,
-      ApplicationId appId) throws IOException {
-    String appOwner = null;
-    if (appReport != null) {
-      //always use the app owner from the app report if possible
-      appOwner = appReport.getUser();
-    } else {
-      appOwner = UserGroupInformation.getCurrentUser().getShortUserName();
-      appOwner = LogCLIHelpers.getOwnerForAppIdOrNull(
-          appId, appOwner, getConf());
+    public void setAppFinished(boolean appFinished) {
+      this.appFinished = appFinished;
     }
-    return appOwner;
   }
 }

http://git-wip-us.apache.org/repos/asf/hadoop/blob/ef175779/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestLogsCLI.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestLogsCLI.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestLogsCLI.java
index 4f1c629..d649ce7 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestLogsCLI.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestLogsCLI.java
@@ -26,11 +26,13 @@ import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.doThrow;
 import static org.mockito.Mockito.mock;
 
+import java.io.BufferedReader;
 import java.io.ByteArrayOutputStream;
 import java.io.DataOutputStream;
 import java.io.File;
 import java.io.FileWriter;
 import java.io.IOException;
+import java.io.InputStreamReader;
 import java.io.PrintStream;
 import java.io.PrintWriter;
 import java.io.Writer;
@@ -41,8 +43,9 @@ import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
-
+import org.apache.commons.io.IOUtils;
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.LocalFileSystem;
 import org.apache.hadoop.fs.Path;
@@ -180,6 +183,10 @@ public class TestLogsCLI {
     pw.println("                                 container log files. Use \"ALL\" to fetch");
     pw.println("                                 all the log files for the container.");
     pw.println(" -nodeAddress <Node Address>     NodeAddress in the format nodename:port");
+    pw.println(" -out <Local Directory>          Local directory for storing individual");
+    pw.println("                                 container logs. The container logs will");
+    pw.println("                                 be stored based on the node the container");
+    pw.println("                                 ran on.");
     pw.println(" -show_meta_info                 Show the log metadata, including log-file");
     pw.println("                                 names, the size of the log files. You can");
     pw.println("                                 combine this with --containerId to get");
@@ -493,6 +500,103 @@ public class TestLogsCLI {
   }
 
   @Test (timeout = 15000)
+  public void testSaveContainerLogsLocally() throws Exception {
+    String remoteLogRootDir = "target/logs/";
+    String rootLogDir = "target/LocalLogs";
+    String localDir = "target/SaveLogs";
+    Path localPath = new Path(localDir);
+
+    Configuration configuration = new Configuration();
+    configuration.setBoolean(YarnConfiguration.LOG_AGGREGATION_ENABLED, true);
+    configuration
+        .set(YarnConfiguration.NM_REMOTE_APP_LOG_DIR, remoteLogRootDir);
+    configuration.setBoolean(YarnConfiguration.YARN_ACL_ENABLE, true);
+    configuration.set(YarnConfiguration.YARN_ADMIN_ACL, "admin");
+
+    FileSystem fs = FileSystem.get(configuration);
+    ApplicationId appId = ApplicationId.newInstance(0, 1);
+    ApplicationAttemptId appAttemptId =
+        ApplicationAttemptId.newInstance(appId, 1);
+    List<ContainerId> containerIds = new ArrayList<ContainerId>();
+    ContainerId containerId1 = ContainerId.newContainerId(
+        appAttemptId, 1);
+    ContainerId containerId2 = ContainerId.newContainerId(
+        appAttemptId, 2);
+    containerIds.add(containerId1);
+    containerIds.add(containerId2);
+
+    List<NodeId> nodeIds = new ArrayList<NodeId>();
+    NodeId nodeId = NodeId.newInstance("localhost", 1234);
+    NodeId nodeId2 = NodeId.newInstance("test", 4567);
+    nodeIds.add(nodeId);
+    nodeIds.add(nodeId2);
+
+    try {
+      createContainerLogs(configuration, remoteLogRootDir, rootLogDir, fs,
+          appId, containerIds, nodeIds);
+
+      YarnClient mockYarnClient =
+          createMockYarnClient(YarnApplicationState.FINISHED,
+          UserGroupInformation.getCurrentUser().getShortUserName());
+      LogsCLI cli = new LogsCLIForTest(mockYarnClient);
+      cli.setConf(configuration);
+      int exitCode = cli.run(new String[] {"-applicationId",
+          appId.toString(),
+          "-out" , localPath.toString()});
+      assertTrue(exitCode == 0);
+
+      // make sure we created a dir named as node id
+      FileStatus[] nodeDir = fs.listStatus(localPath);
+      Arrays.sort(nodeDir);
+      assertTrue(nodeDir.length == 2);
+      assertTrue(nodeDir[0].getPath().getName().contains(
+          LogAggregationUtils.getNodeString(nodeId)));
+      assertTrue(nodeDir[1].getPath().getName().contains(
+          LogAggregationUtils.getNodeString(nodeId2)));
+
+      FileStatus[] container1Dir = fs.listStatus(nodeDir[0].getPath());
+      assertTrue(container1Dir.length == 1);
+      assertTrue(container1Dir[0].getPath().getName().equals(
+          containerId1.toString()));
+      String container1= readContainerContent(container1Dir[0].getPath(), fs);
+      assertTrue(container1.contains("Hello " + containerId1
+          + " in syslog!"));
+
+      FileStatus[] container2Dir = fs.listStatus(nodeDir[1].getPath());
+      assertTrue(container2Dir.length == 1);
+      assertTrue(container2Dir[0].getPath().getName().equals(
+          containerId2.toString()));
+      String container2= readContainerContent(container2Dir[0].getPath(), fs);
+      assertTrue(container2.contains("Hello " + containerId2
+          + " in syslog!"));
+    } finally {
+      fs.delete(new Path(remoteLogRootDir), true);
+      fs.delete(new Path(rootLogDir), true);
+      fs.delete(localPath, true);
+    }
+  }
+
+  private String readContainerContent(Path containerPath,
+      FileSystem fs) throws IOException {
+    assertTrue(fs.exists(containerPath));
+    StringBuffer inputLine = new StringBuffer();
+    BufferedReader reader = null;
+    try {
+      reader = new BufferedReader(new InputStreamReader(
+          fs.open(containerPath)));
+      String tmp;
+      while ((tmp = reader.readLine()) != null) {
+        inputLine.append(tmp);
+      }
+      return inputLine.toString();
+    } finally {
+      if (reader != null) {
+        IOUtils.closeQuietly(reader);
+      }
+    }
+  }
+
+  @Test (timeout = 15000)
   public void testPrintContainerLogMetadata() throws Exception {
     String remoteLogRootDir = "target/logs/";
     Configuration configuration = new Configuration();

http://git-wip-us.apache.org/repos/asf/hadoop/blob/ef175779/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/LogCLIHelpers.java
----------------------------------------------------------------------
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/LogCLIHelpers.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/LogCLIHelpers.java
index ba0dd89..339df9d 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/LogCLIHelpers.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/logaggregation/LogCLIHelpers.java
@@ -24,8 +24,10 @@ import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.PrintStream;
 import java.nio.file.AccessDeniedException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
 import java.util.List;
-
+import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang.StringUtils;
 import org.apache.hadoop.classification.InterfaceAudience.Private;
 import org.apache.hadoop.conf.Configurable;
@@ -54,7 +56,7 @@ public class LogCLIHelpers implements Configurable {
   public int dumpAContainersLogs(String appId, String containerId,
       String nodeId, String jobOwner) throws IOException {
     return dumpAContainersLogsForALogType(appId, containerId, nodeId, jobOwner,
-      null);
+      null, null);
   }
 
   @Private
@@ -107,17 +109,17 @@ public class LogCLIHelpers implements Configurable {
   @Private
   @VisibleForTesting
   public int dumpAContainersLogsForALogType(String appId, String containerId,
-      String nodeId, String jobOwner, List<String> logType)
+      String nodeId, String jobOwner, List<String> logType, String localDir)
       throws IOException {
-    return dumpAContainersLogsForALogType(appId, containerId, nodeId, jobOwner,
-        logType, true);
+    return dumpAContainersLogsForALogType(appId, containerId, nodeId,
+        jobOwner, logType, true, localDir);
   }
 
   @Private
   @VisibleForTesting
   public int dumpAContainersLogsForALogType(String appId, String containerId,
       String nodeId, String jobOwner, List<String> logType,
-      boolean outputFailure) throws IOException {
+      boolean outputFailure, String localDir) throws IOException {
     ApplicationId applicationId = ConverterUtils.toApplicationId(appId);
     RemoteIterator<FileStatus> nodeFiles = getRemoteNodeFileDir(
         applicationId, jobOwner);
@@ -137,17 +139,21 @@ public class LogCLIHelpers implements Configurable {
       if (fileName.contains(LogAggregationUtils.getNodeString(nodeId))
           && !fileName.endsWith(LogAggregationUtils.TMP_FILE_SUFFIX)) {
         AggregatedLogFormat.LogReader reader = null;
+        PrintStream out = createPrintStream(localDir, fileName, containerId);
         try {
+          String containerString = "\n\nContainer: " + containerId;
+          out.println(containerString);
+          out.println(StringUtils.repeat("=", containerString.length()));
           reader =
               new AggregatedLogFormat.LogReader(getConf(),
                 thisNodeFile.getPath());
           if (logType == null) {
-            if (dumpAContainerLogs(containerId, reader, System.out,
+            if (dumpAContainerLogs(containerId, reader, out,
                 thisNodeFile.getModificationTime()) > -1) {
               foundContainerLogs = true;
             }
           } else {
-            if (dumpAContainerLogsForALogType(containerId, reader, System.out,
+            if (dumpAContainerLogsForALogType(containerId, reader, out,
                 thisNodeFile.getModificationTime(), logType) > -1) {
               foundContainerLogs = true;
             }
@@ -156,11 +162,14 @@ public class LogCLIHelpers implements Configurable {
           if (reader != null) {
             reader.close();
           }
+          closePrintStream(out);
         }
       }
     }
-    if (!foundContainerLogs && outputFailure) {
-      containerLogNotFound(containerId);
+    if (!foundContainerLogs) {
+      if (outputFailure) {
+        containerLogNotFound(containerId);
+      }
       return -1;
     }
     return 0;
@@ -168,8 +177,8 @@ public class LogCLIHelpers implements Configurable {
 
   @Private
   public int dumpAContainersLogsForALogTypeWithoutNodeId(String appId,
-      String containerId, String jobOwner, List<String> logType)
-    throws IOException {
+      String containerId, String jobOwner, List<String> logType,
+      String localDir) throws IOException {
     ApplicationId applicationId = ConverterUtils.toApplicationId(appId);
     RemoteIterator<FileStatus> nodeFiles = getRemoteNodeFileDir(
         applicationId, jobOwner);
@@ -182,17 +191,28 @@ public class LogCLIHelpers implements Configurable {
       if (!thisNodeFile.getPath().getName().endsWith(
           LogAggregationUtils.TMP_FILE_SUFFIX)) {
         AggregatedLogFormat.LogReader reader = null;
+        PrintStream out = System.out;
         try {
           reader =
               new AggregatedLogFormat.LogReader(getConf(),
               thisNodeFile.getPath());
+          if (getContainerLogsStream(containerId, reader) == null) {
+            continue;
+          }
+          reader =
+              new AggregatedLogFormat.LogReader(getConf(),
+              thisNodeFile.getPath());
+          out = createPrintStream(localDir, thisNodeFile.getPath().getName(),
+              containerId);
+          out.println(containerId);
+          out.println(StringUtils.repeat("=", containerId.length()));
           if (logType == null) {
-            if (dumpAContainerLogs(containerId, reader, System.out,
+            if (dumpAContainerLogs(containerId, reader, out,
                 thisNodeFile.getModificationTime()) > -1) {
               foundContainerLogs = true;
             }
           } else {
-            if (dumpAContainerLogsForALogType(containerId, reader, System.out,
+            if (dumpAContainerLogsForALogType(containerId, reader, out,
                 thisNodeFile.getModificationTime(), logType) > -1) {
               foundContainerLogs = true;
             }
@@ -201,6 +221,7 @@ public class LogCLIHelpers implements Configurable {
           if (reader != null) {
             reader.close();
           }
+          closePrintStream(out);
         }
       }
     }
@@ -210,19 +231,13 @@ public class LogCLIHelpers implements Configurable {
     }
     return 0;
   }
+
   @Private
   public int dumpAContainerLogs(String containerIdStr,
       AggregatedLogFormat.LogReader reader, PrintStream out,
       long logUploadedTime) throws IOException {
-    DataInputStream valueStream;
-    LogKey key = new LogKey();
-    valueStream = reader.next(key);
-
-    while (valueStream != null && !key.toString().equals(containerIdStr)) {
-      // Next container
-      key = new LogKey();
-      valueStream = reader.next(key);
-    }
+    DataInputStream valueStream = getContainerLogsStream(
+        containerIdStr, reader);
 
     if (valueStream == null) {
       return -1;
@@ -244,10 +259,8 @@ public class LogCLIHelpers implements Configurable {
     return -1;
   }
 
-  @Private
-  public int dumpAContainerLogsForALogType(String containerIdStr,
-      AggregatedLogFormat.LogReader reader, PrintStream out,
-      long logUploadedTime, List<String> logType) throws IOException {
+  private DataInputStream getContainerLogsStream(String containerIdStr,
+      AggregatedLogFormat.LogReader reader) throws IOException {
     DataInputStream valueStream;
     LogKey key = new LogKey();
     valueStream = reader.next(key);
@@ -257,7 +270,15 @@ public class LogCLIHelpers implements Configurable {
       key = new LogKey();
       valueStream = reader.next(key);
     }
+    return valueStream;
+  }
 
+  @Private
+  public int dumpAContainerLogsForALogType(String containerIdStr,
+      AggregatedLogFormat.LogReader reader, PrintStream out,
+      long logUploadedTime, List<String> logType) throws IOException {
+    DataInputStream valueStream = getContainerLogsStream(
+        containerIdStr, reader);
     if (valueStream == null) {
       return -1;
     }
@@ -283,7 +304,7 @@ public class LogCLIHelpers implements Configurable {
 
   @Private
   public int dumpAllContainersLogs(ApplicationId appId, String appOwner,
-      PrintStream out) throws IOException {
+      String localDir) throws IOException {
     RemoteIterator<FileStatus> nodeFiles = getRemoteNodeFileDir(
         appId, appOwner);
     if (nodeFiles == null) {
@@ -310,20 +331,25 @@ public class LogCLIHelpers implements Configurable {
           valueStream = reader.next(key);
 
           while (valueStream != null) {
-
-            String containerString =
-                "\n\nContainer: " + key + " on "
-                + thisNodeFile.getPath().getName();
-            out.println(containerString);
-            out.println(StringUtils.repeat("=", containerString.length()));
-            while (true) {
-              try {
-                LogReader.readAContainerLogsForALogType(valueStream, out,
-                    thisNodeFile.getModificationTime());
-                foundAnyLogs = true;
-              } catch (EOFException eof) {
-                break;
+            PrintStream out = createPrintStream(localDir,
+                thisNodeFile.getPath().getName(), key.toString());
+            try {
+              String containerString =
+                  "\n\nContainer: " + key + " on "
+                  + thisNodeFile.getPath().getName();
+              out.println(containerString);
+              out.println(StringUtils.repeat("=", containerString.length()));
+              while (true) {
+                try {
+                  LogReader.readAContainerLogsForALogType(valueStream, out,
+                      thisNodeFile.getModificationTime());
+                  foundAnyLogs = true;
+                } catch (EOFException eof) {
+                  break;
+                }
               }
+            } finally {
+              closePrintStream(out);
             }
 
             // Next container
@@ -501,4 +527,24 @@ public class LogCLIHelpers implements Configurable {
         + "have permission to access " + remoteAppLogDir
         + ". Error message found: " + errorMessage);
   }
+
+  @Private
+  public PrintStream createPrintStream(String localDir, String nodeId,
+      String containerId) throws IOException {
+    PrintStream out = System.out;
+    if(localDir != null && !localDir.isEmpty()) {
+      Path nodePath = new Path(localDir, LogAggregationUtils
+          .getNodeString(nodeId));
+      Files.createDirectories(Paths.get(nodePath.toString()));
+      Path containerLogPath = new Path(nodePath, containerId);
+      out = new PrintStream(containerLogPath.toString(), "UTF-8");
+    }
+    return out;
+  }
+
+  public void closePrintStream(PrintStream out) {
+    if (out != System.out) {
+      IOUtils.closeQuietly(out);
+    }
+  }
 }


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