YARN-4685. Disable AM blacklisting by default to mitigate situations that 
application get hanged. (Rohith Sharma K S via wangda)

(cherry picked from commit 2da32a6ef9edebd86ca9672d10ce35b5a46818cc)


Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/3e511f39
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/3e511f39
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/3e511f39

Branch: refs/heads/branch-2
Commit: 3e511f39c220ef65708125a37e630c495c450ad1
Parents: c7d782d
Author: Wangda Tan <[email protected]>
Authored: Fri Aug 19 16:31:16 2016 -0700
Committer: Wangda Tan <[email protected]>
Committed: Fri Aug 19 16:47:42 2016 -0700

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 .../main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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http://git-wip-us.apache.org/repos/asf/hadoop/blob/3e511f39/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java
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diff --git 
a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java
 
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java
index 59f9b7a..15ef0c1 100644
--- 
a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java
+++ 
b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java
@@ -2603,7 +2603,7 @@ public class YarnConfiguration extends Configuration {
       RM_PREFIX + "am-scheduling.node-blacklisting-enabled";
   @Private
   public static final boolean DEFAULT_AM_SCHEDULING_NODE_BLACKLISTING_ENABLED =
-      true;
+      false;
 
   @Private
   /**
@@ -2613,7 +2613,7 @@ public class YarnConfiguration extends Configuration {
       RM_PREFIX + "am-scheduling.node-blacklisting-disable-threshold";
   @Private
   public static final float
-      DEFAULT_AM_SCHEDULING_NODE_BLACKLISTING_DISABLE_THRESHOLD = 0.8f;
+      DEFAULT_AM_SCHEDULING_NODE_BLACKLISTING_DISABLE_THRESHOLD = 0.2f;
 
   private static final String NM_SCRIPT_BASED_NODE_LABELS_PROVIDER_PREFIX =
       NM_NODE_LABELS_PROVIDER_PREFIX + "script.";


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