HADOOP-10068. Improve log4j regex in testFindContainingJar. Contributed by Robert Rati.

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

@@ -830,6 +830,9 @@ Release 2.8.0 - UNRELEASED
     HADOOP-12098. Remove redundant test dependencies in Hadoop Archives.
     (Varun Saxena via wheat9)
 
+    HADOOP-10068. Improve log4j regex in testFindContainingJar.
+    (Robert Rati via wheat9)
+
 Release 2.7.3 - UNRELEASED
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestClassUtil.java

@@ -32,9 +32,9 @@ public class TestClassUtil {
     Assert.assertNotNull("Containing jar not found for Logger", 
         containingJar);
     File jarFile = new File(containingJar);
-    Assert.assertTrue("Containing jar does not exist on file system", 
+    Assert.assertTrue("Containing jar does not exist on file system ",
         jarFile.exists());
-    Assert.assertTrue("Incorrect jar file" + containingJar,  
-        jarFile.getName().matches("log4j.+[.]jar"));
+    Assert.assertTrue("Incorrect jar file " + containingJar,
+        jarFile.getName().matches("log4j.*[.]jar"));
   }
 }