diff --git a/astyanax-recipes/src/main/java/com/netflix/astyanax/recipes/storage/ObjectReader.java b/astyanax-recipes/src/main/java/com/netflix/astyanax/recipes/storage/ObjectReader.java
index 34e71e9e5..8dc3d8ab9 100644
--- a/astyanax-recipes/src/main/java/com/netflix/astyanax/recipes/storage/ObjectReader.java
+++ b/astyanax-recipes/src/main/java/com/netflix/astyanax/recipes/storage/ObjectReader.java
@@ -137,7 +137,7 @@ public ObjectMetadata call() throws Exception {
                     ExecutorService executor = Executors.newFixedThreadPool(
                             concurrencyLevel,
                             new ThreadFactoryBuilder().setDaemon(true)
-                                    .setNameFormat("ChunkReader-" + objectName + "-%d").build());
+                                    .setNameFormat("ChunkReader-" + objectName.replace("%","%%") + "-%d").build());
                     try {
                         for (final int chunkId : idsToRead) {
                             executor.submit(new Runnable() {
diff --git a/astyanax-recipes/src/main/java/com/netflix/astyanax/recipes/storage/ObjectWriter.java b/astyanax-recipes/src/main/java/com/netflix/astyanax/recipes/storage/ObjectWriter.java
index 769f08af5..fda5ef878 100644
--- a/astyanax-recipes/src/main/java/com/netflix/astyanax/recipes/storage/ObjectWriter.java
+++ b/astyanax-recipes/src/main/java/com/netflix/astyanax/recipes/storage/ObjectWriter.java
@@ -107,7 +107,7 @@ public ObjectMetadata call() throws Exception {
 
         try {
             final ExecutorService executor = Executors.newFixedThreadPool(concurrencyLevel, new ThreadFactoryBuilder()
-                    .setDaemon(true).setNameFormat("ChunkWriter-" + objectName + "-%d").build());
+                    .setDaemon(true).setNameFormat("ChunkWriter-" + objectName.replace("%","%%") + "-%d").build());
             final BlockingConcurrentWindowCounter chunkCounter = new BlockingConcurrentWindowCounter(concurrencyLevel);
             final AutoAllocatingLinkedBlockingQueue<ByteBuffer> blocks = new AutoAllocatingLinkedBlockingQueue<ByteBuffer>(
                     concurrencyLevel);