diff --git a/client/sniffer/src/main/java/org/opensearch/client/sniff/OpenSearchNodesSniffer.java b/client/sniffer/src/main/java/org/opensearch/client/sniff/OpenSearchNodesSniffer.java
index 36fd9e377bd04..c1a0fcf9a8acf 100644
--- a/client/sniffer/src/main/java/org/opensearch/client/sniff/OpenSearchNodesSniffer.java
+++ b/client/sniffer/src/main/java/org/opensearch/client/sniff/OpenSearchNodesSniffer.java
@@ -246,7 +246,7 @@ private static Node readNode(String nodeId, JsonParser parser, Scheme scheme) th
             if (entry.getValue().startsWith("[")) {
                 // Convert string array to list
                 String value = entry.getValue();
-                String[] values = value.substring(1, value.length() - 1).replaceAll("\\s+", "").split(",");
+                String[] values = value.substring(1, value.length() - 1).split(", ");
                 realAttributes.put(entry.getKey(), unmodifiableList(Arrays.asList(values)));
             } else {
                 realAttributes.put(entry.getKey(), singletonList(entry.getValue()));