diff --git a/client/src/main/java/org/apache/falcon/ExtensionHandler.java b/client/src/main/java/org/apache/falcon/ExtensionHandler.java
index e17f8e6..769cd78 100644
--- a/client/src/main/java/org/apache/falcon/ExtensionHandler.java
+++ b/client/src/main/java/org/apache/falcon/ExtensionHandler.java
@@ -55,6 +55,7 @@
     public static final Logger LOG = LoggerFactory.getLogger(ExtensionHandler.class);
     private static final String UTF_8 = CharEncoding.UTF_8;
     private static final String TMP_BASE_DIR = String.format("file://%s", System.getProperty("java.io.tmpdir"));
+    private static final String PATH_SEPARATOR = "_";
     private static final String LOCATION = "location";
     private static final String TYPE = "type";
     private static final String NAME = "extensionName";
@@ -146,8 +147,8 @@
     }
 
     private static String createStagePath(String extensionName, String jobName) {
-        String stagePath = TMP_BASE_DIR + File.separator + extensionName + File.separator + jobName
-                + File.separator + System.currentTimeMillis()/1000;
+        String stagePath = TMP_BASE_DIR + File.separator + extensionName + PATH_SEPARATOR + jobName
+                + PATH_SEPARATOR + System.currentTimeMillis()/1000;
         File tmpPath = new File(stagePath);
         if (tmpPath.mkdir()) {
             throw new FalconCLIException("Failed to create stage directory" + tmpPath.toString());