From 1884c3a0b973efd9d841ef73717535fb7e50a405 Mon Sep 17 00:00:00 2001
From: Jonathan Turner Eagles <jeagles@apache.org>
Date: Wed, 13 Nov 2013 03:26:20 +0000
Subject: [PATCH] YARN-1386. NodeManager mistakenly loses resources and
 relocalizes them (Jason Lowe via jeagles)

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-2@1541376 13f79535-47bb-0310-9956-ffa450edef68
---
 hadoop-yarn-project/CHANGES.txt                    |  3 +++
 .../localizer/ContainerLocalizer.java              | 14 ++++++++++++--
 .../localizer/TestContainerLocalizer.java          |  5 +++--
 3 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/hadoop-yarn-project/CHANGES.txt b/hadoop-yarn-project/CHANGES.txt
index 3fac4d29939..ec88e25b7a7 100644
--- a/hadoop-yarn-project/CHANGES.txt
+++ b/hadoop-yarn-project/CHANGES.txt
@@ -1621,6 +1621,9 @@ Release 0.23.10 - UNRELEASED
     YARN-1176. RM web services ClusterMetricsInfo total nodes doesn't include 
     unhealthy nodes (Jonathan Eagles via tgraves)
 
+    YARN-1386. NodeManager mistakenly loses resources and relocalizes them
+    (Jason Lowe via jeagles)
+
 Release 0.23.9 - 2013-07-08
 
   INCOMPATIBLE CHANGES
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/ContainerLocalizer.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/ContainerLocalizer.java
index 51ce9e2fb19..f05f49cd4f1 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/ContainerLocalizer.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/ContainerLocalizer.java
@@ -46,6 +46,7 @@ import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.FileUtil;
 import org.apache.hadoop.fs.LocalDirAllocator;
 import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.permission.FsPermission;
 import org.apache.hadoop.security.Credentials;
 import org.apache.hadoop.security.UserGroupInformation;
 import org.apache.hadoop.security.token.Token;
@@ -82,6 +83,8 @@ public class ContainerLocalizer {
   public static final String WORKDIR = "work";
   private static final String APPCACHE_CTXT_FMT = "%s.app.cache.dirs";
   private static final String USERCACHE_CTXT_FMT = "%s.user.cache.dirs";
+  private static final FsPermission FILECACHE_PERMS =
+      new FsPermission((short)0710);
 
   private final String user;
   private final String appId;
@@ -363,16 +366,23 @@ public class ContainerLocalizer {
       // $x/usercache/$user/filecache
       Path userFileCacheDir = new Path(base, FILECACHE);
       usersFileCacheDirs[i] = userFileCacheDir.toString();
-      lfs.mkdir(userFileCacheDir, null, false);
+      createDir(lfs, userFileCacheDir, FILECACHE_PERMS, false);
       // $x/usercache/$user/appcache/$appId
       Path appBase = new Path(base, new Path(APPCACHE, appId));
       // $x/usercache/$user/appcache/$appId/filecache
       Path appFileCacheDir = new Path(appBase, FILECACHE);
       appsFileCacheDirs[i] = appFileCacheDir.toString();
-      lfs.mkdir(appFileCacheDir, null, false);
+      createDir(lfs, appFileCacheDir, FILECACHE_PERMS, false);
     }
     conf.setStrings(String.format(APPCACHE_CTXT_FMT, appId), appsFileCacheDirs);
     conf.setStrings(String.format(USERCACHE_CTXT_FMT, user), usersFileCacheDirs);
   }
 
+  private static void createDir(FileContext lfs, Path dirPath,
+      FsPermission perms, boolean createParent) throws IOException {
+    lfs.mkdir(dirPath, perms, createParent);
+    if (!perms.equals(perms.applyUMask(lfs.getUMask()))) {
+      lfs.setPermission(dirPath, perms);
+    }
+  }
 }
diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/TestContainerLocalizer.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/TestContainerLocalizer.java
index 10da1bee13d..22fad6f0c80 100644
--- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/TestContainerLocalizer.java
+++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/test/java/org/apache/hadoop/yarn/server/nodemanager/containermanager/localizer/TestContainerLocalizer.java
@@ -83,6 +83,7 @@ public class TestContainerLocalizer {
   static final Log LOG = LogFactory.getLog(TestContainerLocalizer.class);
   static final Path basedir =
       new Path("target", TestContainerLocalizer.class.getName());
+  static final FsPermission CACHE_DIR_PERM = new FsPermission((short)0710);
 
   static final String appUser = "yak";
   static final String appId = "app_RM_0";
@@ -171,12 +172,12 @@ public class TestContainerLocalizer {
       Path base = new Path(new Path(p, ContainerLocalizer.USERCACHE), appUser);
       Path privcache = new Path(base, ContainerLocalizer.FILECACHE);
       // $x/usercache/$user/filecache
-      verify(spylfs).mkdir(eq(privcache), isA(FsPermission.class), eq(false));
+      verify(spylfs).mkdir(eq(privcache), eq(CACHE_DIR_PERM), eq(false));
       Path appDir =
         new Path(base, new Path(ContainerLocalizer.APPCACHE, appId));
       // $x/usercache/$user/appcache/$appId/filecache
       Path appcache = new Path(appDir, ContainerLocalizer.FILECACHE);
-      verify(spylfs).mkdir(eq(appcache), isA(FsPermission.class), eq(false));
+      verify(spylfs).mkdir(eq(appcache), eq(CACHE_DIR_PERM), eq(false));
     }
     // verify tokens read at expected location
     verify(spylfs).open(tokenPath);