diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/UnknownRegionException.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/UnknownRegionException.java
index f870bfcc51c..850cd960062 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/UnknownRegionException.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/UnknownRegionException.java
@@ -29,9 +29,21 @@ public class UnknownRegionException extends DoNotRetryRegionException {
   private static final long serialVersionUID = 1968858760475205392L;
 
   /**
-   * @param regionName the name of the region which is unknown
+   * Constructs a new UnknownRegionException with the specified detail message.
+   *
+   * @param message the detail message
    */
-  public UnknownRegionException(String regionName) {
-    super(regionName);
+  public UnknownRegionException(String message) {
+    super(message);
+  }
+
+  /**
+   * Constructs a new UnknownRegionException with the specified detail message and cause.
+   *
+   * @param message the detail message
+   * @param cause the cause of the exception
+   */
+  public UnknownRegionException(String message, Throwable cause) {
+    super(message, cause);
   }
 }
diff --git a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/DoNotRetryRegionException.java b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/DoNotRetryRegionException.java
index 61ad5cd48a2..9419137842f 100644
--- a/hbase-client/src/main/java/org/apache/hadoop/hbase/client/DoNotRetryRegionException.java
+++ b/hbase-client/src/main/java/org/apache/hadoop/hbase/client/DoNotRetryRegionException.java
@@ -37,6 +37,10 @@ public class DoNotRetryRegionException extends DoNotRetryIOException {
     super(s);
   }
 
+  public DoNotRetryRegionException(String s, Throwable cause) {
+    super(s, cause);
+  }
+
   public DoNotRetryRegionException(Throwable cause) {
     super(cause);
   }
diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignmentManager.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignmentManager.java
index e4bd670d154..700c91e735a 100644
--- a/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignmentManager.java
+++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/master/assignment/AssignmentManager.java
@@ -1628,9 +1628,9 @@ public class AssignmentManager {
       regionStateStore.visitMetaForRegion(regionEncodedName, visitor);
       return regionStates.getRegionState(regionEncodedName) == null ? null :
         regionStates.getRegionState(regionEncodedName).getRegion();
-    } catch(IOException e) {
-      LOG.error("Error trying to load region {} from META", regionEncodedName, e);
-      throw new UnknownRegionException("Error while trying load region from meta");
+    } catch (IOException e) {
+      throw new UnknownRegionException(
+          "Error trying to load region " + regionEncodedName + " from META", e);
     }
   }