Executor is waiting for lock

sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
org.apache.spark.storage.ShuffleBlockFetcherIterator.next(ShuffleBlockFetcherIterator.scala:313)
org.apache.spark.storage.ShuffleBlockFetcherIterator.next(ShuffleBlockFetcherIterator.scala:54)
scala.collection.Iterator$$anon$11.next(Iterator.scala:409)
scala.collection.Iterator$$anon$12.nextCur(Iterator.scala:434)
scala.collection.Iterator$$anon$12.hasNext(Iterator.scala:440)
scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)
org.apache.spark.util.CompletionIterator.hasNext(CompletionIterator.scala:32)
org.apache.spark.InterruptibleIterator.hasNext(InterruptibleIterator.scala:39)
scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIterator.sort_addToSorter$(Unknown Source)
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIterator.processNext(Unknown Source)
org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
org.apache.spark.sql.execution.WholeStageCodegenExec$$anonfun$8$$anon$1.hasNext(WholeStageCodegenExec.scala:377)
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIterator.findNextInnerJoinRows$(Unknown Source)
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIterator.processNext(Unknown Source)
org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
org.apache.spark.sql.execution.WholeStageCodegenExec$$anonfun$10$$anon$2.hasNext(WholeStageCodegenExec.scala:396)
org.apache.spark.sql.execution.columnar.InMemoryRelation$$anonfun$1$$anon$1.hasNext(InMemoryRelation.scala:138)
org.apache.spark.storage.memory.MemoryStore.putIteratorAsValues(MemoryStore.scala:215)
org.apache.spark.storage.BlockManager$$anonfun$doPutIterator$1.apply(BlockManager.scala:957)
org.apache.spark.storage.BlockManager$$anonfun$doPutIterator$1.apply(BlockManager.scala:948)
org.apache.spark.storage.BlockManager.doPut(BlockManager.scala:888)
org.apache.spark.storage.BlockManager.doPutIterator(BlockManager.scala:948)
org.apache.spark.storage.BlockManager.getOrElseUpdate(BlockManager.scala:694)
org.apache.spark.rdd.RDD.getOrCompute(RDD.scala:342)
org.apache.spark.rdd.RDD.iterator(RDD.scala:293)
org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:331)
org.apache.spark.rdd.RDD.iterator(RDD.scala:295)
org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:331)
org.apache.spark.rdd.RDD.iterator(RDD.scala:295)
org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:331)
org.apache.spark.rdd.RDD.iterator(RDD.scala:295)
org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:331)
org.apache.spark.rdd.RDD.iterator(RDD.scala:295)
org.apache.spark.rdd.MapPartitionsRDD.compute(MapPartitionsRDD.scala:38)
org.apache.spark.rdd.RDD.computeOrReadCheckpoint(RDD.scala:331)
org.apache.spark.rdd.RDD.iterator(RDD.scala:295)
org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:96)
org.apache.spark.scheduler.ShuffleMapTask.runTask(ShuffleMapTask.scala:53)
org.apache.spark.scheduler.Task.run(Task.scala:99)
org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:330)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
java.lang.Thread.run(Thread.java:745)