diff --git a/exporters/metrics/util/src/main/java/io/opencensus/exporter/metrics/util/DaemonThreadFactory.java b/exporters/metrics/util/src/main/java/io/opencensus/exporter/metrics/util/DaemonThreadFactory.java
deleted file mode 100644
index 39a1b0c623..0000000000
--- a/exporters/metrics/util/src/main/java/io/opencensus/exporter/metrics/util/DaemonThreadFactory.java
+++ /dev/null
@@ -1,45 +0,0 @@
-/*
- * Copyright 2019, OpenCensus Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package io.opencensus.exporter.metrics.util;
-
-import com.google.common.util.concurrent.MoreExecutors;
-import java.util.concurrent.ThreadFactory;
-
-/**
- * A lightweight {@link ThreadFactory} to spawn threads in a GAE-Java7-compatible way.
- *
- * @since 0.19
- */
-// TODO(Hailong): Remove this once we use a callback to implement the exporter.
-final class DaemonThreadFactory implements ThreadFactory {
-  // AppEngine runtimes have constraints on threading and socket handling
-  // that need to be accommodated.
-  private static final boolean IS_RESTRICTED_APPENGINE =
-      System.getProperty("com.google.appengine.runtime.environment") != null
-          && "1.7".equals(System.getProperty("java.specification.version"));
-  private static final ThreadFactory threadFactory = MoreExecutors.platformThreadFactory();
-
-  @Override
-  public Thread newThread(Runnable r) {
-    Thread thread = threadFactory.newThread(r);
-    if (!IS_RESTRICTED_APPENGINE) {
-      thread.setName("ExportWorkerThread");
-      thread.setDaemon(true);
-    }
-    return thread;
-  }
-}
diff --git a/exporters/metrics/util/src/main/java/io/opencensus/exporter/metrics/util/IntervalMetricReader.java b/exporters/metrics/util/src/main/java/io/opencensus/exporter/metrics/util/IntervalMetricReader.java
index 683f628b55..f795b9c126 100644
--- a/exporters/metrics/util/src/main/java/io/opencensus/exporter/metrics/util/IntervalMetricReader.java
+++ b/exporters/metrics/util/src/main/java/io/opencensus/exporter/metrics/util/IntervalMetricReader.java
@@ -39,7 +39,13 @@ public final class IntervalMetricReader {
 
   private IntervalMetricReader(Worker worker) {
     this.worker = worker;
-    this.workerThread = new DaemonThreadFactory().newThread(worker);
+    this.workerThread = new Thread(worker);
+    try {
+      this.workerThread.setName("ExportWorkerThread");
+      this.workerThread.setDaemon(true);
+    } catch (SecurityException e) {
+      // OK if we can't set the name or daemon in this environment.
+    }
     workerThread.start();
   }
 
diff --git a/impl_core/src/main/java/io/opencensus/implcore/internal/DaemonThreadFactory.java b/impl_core/src/main/java/io/opencensus/implcore/internal/DaemonThreadFactory.java
index e4481df49e..ee3b4a27af 100644
--- a/impl_core/src/main/java/io/opencensus/implcore/internal/DaemonThreadFactory.java
+++ b/impl_core/src/main/java/io/opencensus/implcore/internal/DaemonThreadFactory.java
@@ -16,14 +16,12 @@
 
 package io.opencensus.implcore.internal;
 
-import com.google.common.util.concurrent.MoreExecutors;
 import java.util.concurrent.ThreadFactory;
 import java.util.concurrent.atomic.AtomicInteger;
 
 /** A {@link ThreadFactory} implementation that starts all {@link Thread} as daemons. */
 public final class DaemonThreadFactory implements ThreadFactory {
   private static final String DELIMITER = "-";
-  private static final ThreadFactory threadFactory = MoreExecutors.platformThreadFactory();
   private final AtomicInteger threadIdGen = new AtomicInteger();
   private final String threadPrefix;
 
@@ -38,8 +36,7 @@ public DaemonThreadFactory(String threadPrefix) {
 
   @Override
   public Thread newThread(Runnable r) {
-    Thread thread = threadFactory.newThread(r);
-    // AppEngine runtimes have constraints on thread renaming.
+    Thread thread = new Thread(r);
     try {
       thread.setName(threadPrefix + threadIdGen.getAndIncrement());
       thread.setDaemon(true);