Kafka Streams failed to delete the state directory - DirectoryNotEmptyException - apache-kafka-streams

Question

I noticed the exception stream-thread [x-CleanupThread] Failed to delete the state directory with our kafka streams application. Application uses a windowed state store and is defined as:
Stores.windowStoreBuilder(
Stores.persistentWindowStore(
storeName,
retentionPeriod,
retentionWindowSize,
false),
Serdes.String(),
Serdes.String()).withCachingEnabled();
This is not a test issue using topology driver. This is in actual deployed stream application. Every ten minutes it will try to delete the directory and fail with the stack trace below. Checking the directory it appears empty using ls -al. I have also tried modifying the permissions of the directory using chmod 777 with no luck.
Stack Trace:
java.nio.file.DirectoryNotEmptyException: /data/consumer/0_17
at sun.nio.fs.UnixFileSystemProvider.implDelete(UnixFileSystemProvider.java:242)
at sun.nio.fs.AbstractFileSystemProvider.delete(AbstractFileSystemProvider.java:103)
at java.nio.file.Files.delete(Files.java:1126)
at org.apache.kafka.common.utils.Utils$2.postVisitDirectory(Utils.java:763)
at org.apache.kafka.common.utils.Utils$2.postVisitDirectory(Utils.java:746)
at java.nio.file.Files.walkFileTree(Files.java:2688)
at java.nio.file.Files.walkFileTree(Files.java:2742)
at org.apache.kafka.common.utils.Utils.delete(Utils.java:746)
at org.apache.kafka.streams.processor.internals.StateDirectory.cleanRemovedTasks(StateDirectory.java:290)
at org.apache.kafka.streams.processor.internals.StateDirectory.cleanRemovedTasks(StateDirectory.java:253)
at org.apache.kafka.streams.KafkaStreams$2.run(KafkaStreams.java:794)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)