diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/HDFSBackedStateStoreProvider.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/HDFSBackedStateStoreProvider.scala
index 61f00041296b8..5c55034e88df5 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/HDFSBackedStateStoreProvider.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/HDFSBackedStateStoreProvider.scala
@@ -303,15 +303,15 @@ private[state] class HDFSBackedStateStoreProvider extends StateStoreProvider wit
 
   private lazy val metricStateOnCurrentVersionSizeBytes: StateStoreCustomSizeMetric =
     StateStoreCustomSizeMetric("stateOnCurrentVersionSizeBytes",
-      "estimated size of state only on current version", "bytes")
+      "estimated size of state only on current version")
 
   private lazy val metricLoadedMapCacheHit: StateStoreCustomMetric =
     StateStoreCustomSumMetric("loadedMapCacheHitCount",
-      "count of cache hit on states cache in provider", "hit count")
+      "count of cache hit on states cache in provider")
 
   private lazy val metricLoadedMapCacheMiss: StateStoreCustomMetric =
     StateStoreCustomSumMetric("loadedMapCacheMissCount",
-      "count of cache miss on states cache in provider", "hit count")
+      "count of cache miss on states cache in provider")
 
   private case class StoreFile(version: Long, path: Path, isSnapshot: Boolean)
 
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/StateStore.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/StateStore.scala
index 084ddf8077a15..05bcee7b05c6f 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/StateStore.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/StateStore.scala
@@ -178,15 +178,11 @@ object StateStoreMetrics {
 trait StateStoreCustomMetric {
   def name: String
   def desc: String
-  def unit: String = ""
 }
 
-case class StateStoreCustomSumMetric(name: String, desc: String, override val unit: String)
-  extends StateStoreCustomMetric
-case class StateStoreCustomSizeMetric(name: String, desc: String, override val unit: String)
-  extends StateStoreCustomMetric
-case class StateStoreCustomTimingMetric(name: String, desc: String, override val unit: String)
-  extends StateStoreCustomMetric
+case class StateStoreCustomSumMetric(name: String, desc: String) extends StateStoreCustomMetric
+case class StateStoreCustomSizeMetric(name: String, desc: String) extends StateStoreCustomMetric
+case class StateStoreCustomTimingMetric(name: String, desc: String) extends StateStoreCustomMetric
 
 /**
  * An exception thrown when an invalid UnsafeRow is detected in state store.
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/SymmetricHashJoinStateManager.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/SymmetricHashJoinStateManager.scala
index 8cf3739e11150..dae771c613131 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/SymmetricHashJoinStateManager.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/state/SymmetricHashJoinStateManager.scala
@@ -313,11 +313,11 @@ class SymmetricHashJoinStateManager(
       keyWithIndexToValueMetrics.numKeys,       // represent each buffered row only once
       keyToNumValuesMetrics.memoryUsedBytes + keyWithIndexToValueMetrics.memoryUsedBytes,
       keyWithIndexToValueMetrics.customMetrics.map {
-        case (s @ StateStoreCustomSumMetric(_, desc, _), value) =>
+        case (s @ StateStoreCustomSumMetric(_, desc), value) =>
           s.copy(desc = newDesc(desc)) -> value
-        case (s @ StateStoreCustomSizeMetric(_, desc, _), value) =>
+        case (s @ StateStoreCustomSizeMetric(_, desc), value) =>
           s.copy(desc = newDesc(desc)) -> value
-        case (s @ StateStoreCustomTimingMetric(_, desc, _), value) =>
+        case (s @ StateStoreCustomTimingMetric(_, desc), value) =>
           s.copy(desc = newDesc(desc)) -> value
         case (s, _) =>
           throw new IllegalArgumentException(
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/statefulOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/statefulOperators.scala
index 9a5183a22d23d..1449d937982e8 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/statefulOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/streaming/statefulOperators.scala
@@ -126,11 +126,11 @@ trait StateStoreWriter extends StatefulOperator { self: SparkPlan =>
   private def stateStoreCustomMetrics: Map[String, SQLMetric] = {
     val provider = StateStoreProvider.create(sqlContext.conf.stateStoreProviderClass)
     provider.supportedCustomMetrics.map {
-      case StateStoreCustomSumMetric(name, desc, _) =>
+      case StateStoreCustomSumMetric(name, desc) =>
         name -> SQLMetrics.createMetric(sparkContext, desc)
-      case StateStoreCustomSizeMetric(name, desc, _) =>
+      case StateStoreCustomSizeMetric(name, desc) =>
         name -> SQLMetrics.createSizeMetric(sparkContext, desc)
-      case StateStoreCustomTimingMetric(name, desc, _) =>
+      case StateStoreCustomTimingMetric(name, desc) =>
         name -> SQLMetrics.createTimingMetric(sparkContext, desc)
     }.toMap
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/streaming/ui/StreamingQueryStatisticsPage.scala b/sql/core/src/main/scala/org/apache/spark/sql/streaming/ui/StreamingQueryStatisticsPage.scala
index 966de0cdae83e..80c44159e8248 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/streaming/ui/StreamingQueryStatisticsPage.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/streaming/ui/StreamingQueryStatisticsPage.scala
@@ -37,9 +37,9 @@ private[ui] class StreamingQueryStatisticsPage(parent: StreamingQueryTab)
 
   // State store provider implementation mustn't do any heavyweight initialiation in constructor
   // but in its init method.
-  private val supportedMetrics = StateStoreProvider.create(
+  private val supportedCustomMetrics = StateStoreProvider.create(
     parent.parent.conf.get(STATE_STORE_PROVIDER_CLASS)).supportedCustomMetrics
-  logDebug(s"Supported metrics: $supportedMetrics")
+  logDebug(s"Supported custom metrics: $supportedCustomMetrics")
 
   def generateLoadResources(request: HttpServletRequest): Seq[Node] = {
     // scalastyle:off
@@ -272,7 +272,7 @@ private[ui] class StreamingQueryStatisticsPage(parent: StreamingQueryTab)
         val data = query.recentProgress.map(p => (parseProgressTimestamp(p.timestamp),
           p.stateOperators.map(_.customMetrics.get(metricName).toDouble).sum))
         val max = data.maxBy(_._2)._2
-        val metric = supportedMetrics.find(_.name == metricName).get
+        val metric = supportedCustomMetrics.find(_.name == metricName).get
 
         val graphUIData =
           new GraphUIData(
@@ -283,7 +283,7 @@ private[ui] class StreamingQueryStatisticsPage(parent: StreamingQueryTab)
             maxBatchTime,
             0,
             max,
-            metric.unit)
+            "")
         graphUIData.generateDataJs(jsCollector)
 
         result ++=