HADOOP-11546. Checkstyle failing: Unable to instantiate DoubleCheckedLockingCheck. (ozawa)

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -826,6 +826,9 @@ Release 2.7.0 - UNRELEASED
     HADOOP-11529. Fix findbugs warnings in hadoop-archives.
     (Masatake Iwasaki via wheat9)
 
+    HADOOP-11546. Checkstyle failing: Unable to instantiate 
+    DoubleCheckedLockingCheck. (ozawa)
+
 Release 2.6.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/dev-support/checkstyle.xml

@@ -150,7 +150,6 @@
         <!-- Checks for common coding problems               -->
         <!-- See http://checkstyle.sf.net/config_coding.html -->
         <!-- module name="AvoidInlineConditionals"/-->
-        <module name="DoubleCheckedLocking"/>
         <module name="EmptyStatement"/>
         <module name="EqualsHashCode"/>
         <module name="HiddenField">

hadoop-hdfs-project/hadoop-hdfs/dev-support/checkstyle.xml

@@ -134,7 +134,6 @@
         <!-- Checks for common coding problems               -->
         <!-- See http://checkstyle.sf.net/config_coding.html -->
         <!-- module name="AvoidInlineConditionals"/-->
-        <module name="DoubleCheckedLocking"/>
         <module name="EmptyStatement"/>
         <module name="EqualsHashCode"/>
         <module name="HiddenField">

hadoop-tools/hadoop-azure/src/config/checkstyle.xml

@@ -147,7 +147,6 @@
         <!-- Checks for common coding problems               -->
         <!-- See http://checkstyle.sf.net/config_coding.html -->
         <!-- <module name="AvoidInlineConditionals"/> -->
-        <!-- <module name="DoubleCheckedLocking"/> -->
         <module name="EmptyStatement"/>
         <module name="EqualsHashCode"/>
         <!-- <module name="HiddenField"/> -->