SeleniumHQ
diff --git a/‎java/client/src/org/openqa/selenium/By.java‎
Lines changed: 4 additions & 0 deletions b/‎java/client/src/org/openqa/selenium/By.java‎
Lines changed: 4 additions & 0 deletions
diff --git a/‎java/client/src/org/openqa/selenium/remote/RemoteWebDriver.java‎
Lines changed: 5 additions & 5 deletions b/‎java/client/src/org/openqa/selenium/remote/RemoteWebDriver.java‎
Lines changed: 5 additions & 5 deletions
@@ -259,6 +259,10 @@ public ByTagName(String tagName) {
         Require.argument("Tag name", tagName)
           .nonNull("Cannot find elements when the tag name is null."));
 
+      if (tagName.isEmpty()) {
+        throw new InvalidSelectorException("Tag name must not be blank");
+      }
+
       this.tagName = tagName;
     }
 
 
@@ -104,11 +104,11 @@ public class RemoteWebDriver implements WebDriver, JavascriptExecutor, HasInputD
   // multiple constructors and we occasionally add a new one, and `init`
   // may be overridden by the user
   {
-    remotableBys.put(By.cssSelector("").getClass(), Mechanism.REMOTE);
-    remotableBys.put(By.linkText("").getClass(), Mechanism.REMOTE);
-    remotableBys.put(By.partialLinkText("").getClass(), Mechanism.REMOTE);
-    remotableBys.put(By.tagName("").getClass(), Mechanism.REMOTE);
-    remotableBys.put(By.xpath("").getClass(), Mechanism.REMOTE);
+    remotableBys.put(By.cssSelector("a").getClass(), Mechanism.REMOTE);
+    remotableBys.put(By.linkText("a").getClass(), Mechanism.REMOTE);
+    remotableBys.put(By.partialLinkText("a").getClass(), Mechanism.REMOTE);
+    remotableBys.put(By.tagName("a").getClass(), Mechanism.REMOTE);
+    remotableBys.put(By.xpath("//a").getClass(), Mechanism.REMOTE);
   }
 
   private ErrorHandler errorHandler = new ErrorHandler();
Original file line number	Diff line number	Diff line change
`@@ -259,6 +259,10 @@ public ByTagName(String tagName) {`
`259`	`259`	`Require.argument("Tag name", tagName)`
`260`	`260`	`.nonNull("Cannot find elements when the tag name is null."));`
`261`	`261`
	`262`	`+ if (tagName.isEmpty()) {`
	`263`	`+ throw new InvalidSelectorException("Tag name must not be blank");`
	`264`	`+ }`
	`265`	`+`
`262`	`266`	`this.tagName = tagName;`
`263`	`267`	`}`
`264`	`268`