diff --git a/core/src/main/scala/org/apache/spark/internal/config/package.scala b/core/src/main/scala/org/apache/spark/internal/config/package.scala
index 11cb5d39e5647..a07e43afd2537 100644
--- a/core/src/main/scala/org/apache/spark/internal/config/package.scala
+++ b/core/src/main/scala/org/apache/spark/internal/config/package.scala
@@ -499,6 +499,12 @@ package object config {
       .stringConf
       .createOptional
 
+  private[spark] val UI_REQUEST_HEADER_SIZE =
+    ConfigBuilder("spark.ui.requestHeaderSize")
+      .doc("Value for HTTP request header size in bytes.")
+      .bytesConf(ByteUnit.BYTE)
+      .createWithDefaultString("8k")
+
   private[spark] val EXTRA_LISTENERS = ConfigBuilder("spark.extraListeners")
     .doc("Class names of listeners to add to SparkContext during initialization.")
     .stringConf
diff --git a/core/src/main/scala/org/apache/spark/ui/JettyUtils.scala b/core/src/main/scala/org/apache/spark/ui/JettyUtils.scala
index ba98fa1548167..8412cdae1580d 100644
--- a/core/src/main/scala/org/apache/spark/ui/JettyUtils.scala
+++ b/core/src/main/scala/org/apache/spark/ui/JettyUtils.scala
@@ -355,13 +355,15 @@ private[spark] object JettyUtils extends Logging {
 
         (connector, connector.getLocalPort())
       }
+      val httpConfig = new HttpConfiguration()
+      httpConfig.setRequestHeaderSize(conf.get(UI_REQUEST_HEADER_SIZE).toInt)
 
       // If SSL is configured, create the secure connector first.
       val securePort = sslOptions.createJettySslContextFactory().map { factory =>
         val securePort = sslOptions.port.getOrElse(if (port > 0) Utils.userPort(port, 400) else 0)
         val secureServerName = if (serverName.nonEmpty) s"$serverName (HTTPS)" else serverName
         val connectionFactories = AbstractConnectionFactory.getFactories(factory,
-          new HttpConnectionFactory())
+          new HttpConnectionFactory(httpConfig))
 
         def sslConnect(currentPort: Int): (ServerConnector, Int) = {
           newConnector(connectionFactories, currentPort)
@@ -376,7 +378,7 @@ private[spark] object JettyUtils extends Logging {
 
       // Bind the HTTP port.
       def httpConnect(currentPort: Int): (ServerConnector, Int) = {
-        newConnector(Array(new HttpConnectionFactory()), currentPort)
+        newConnector(Array(new HttpConnectionFactory(httpConfig)), currentPort)
       }
 
       val (httpConnector, httpPort) = Utils.startServiceOnPort[ServerConnector](port, httpConnect,
diff --git a/docs/configuration.md b/docs/configuration.md
index 153066b96ec7b..2c18fa94a3888 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -909,6 +909,14 @@ Apart from these, the following properties are also available, and may be useful
     How many dead executors the Spark UI and status APIs remember before garbage collecting.
   </td>
 </tr>
+<tr>
+  <td><code>spark.ui.requestHeaderSize</code></td>
+  <td>8k</td>
+  <td>
+    The maximum allowed size for a HTTP request header, in bytes unless otherwise specified.
+    This setting applies for the Spark History Server too.
+  <td>
+</tr>
 </table>
 
 ### Compression and Serialization