diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
index dc0f21c5e91d1..808ef08361210 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
@@ -258,7 +258,7 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
     // Make fake resource offers on all executors
     private def makeOffers() {
       // Make sure no executor is killed while some task is launching on it
-      val taskDescs = CoarseGrainedSchedulerBackend.this.synchronized {
+      val taskDescs = withLock {
         // Filter out executors under killing
         val activeExecutors = executorDataMap.filterKeys(executorIsAlive)
         val workOffers = activeExecutors.map {
@@ -284,7 +284,7 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
     // Make fake resource offers on just one executor
     private def makeOffers(executorId: String) {
       // Make sure no executor is killed while some task is launching on it
-      val taskDescs = CoarseGrainedSchedulerBackend.this.synchronized {
+      val taskDescs = withLock {
         // Filter out executors under killing
         if (executorIsAlive(executorId)) {
           val executorData = executorDataMap(executorId)
@@ -631,7 +631,7 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
       force: Boolean): Seq[String] = {
     logInfo(s"Requesting to kill executor(s) ${executorIds.mkString(", ")}")
 
-    val response = synchronized {
+    val response = withLock {
       val (knownExecutors, unknownExecutors) = executorIds.partition(executorDataMap.contains)
       unknownExecutors.foreach { id =>
         logWarning(s"Executor to kill $id does not exist!")
@@ -730,6 +730,13 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, val rpcEnv: Rp
 
   protected def currentDelegationTokens: Array[Byte] = delegationTokens.get()
 
+  // SPARK-27112: We need to ensure that there is ordering of lock acquisition
+  // between TaskSchedulerImpl and CoarseGrainedSchedulerBackend objects in order to fix
+  // the deadlock issue exposed in SPARK-27112
+  private def withLock[T](fn: => T): T = scheduler.synchronized {
+    CoarseGrainedSchedulerBackend.this.synchronized { fn }
+  }
+
 }
 
 private[spark] object CoarseGrainedSchedulerBackend {