nit

Author: pan3793

hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/web/oauth2/CredentialBasedAccessTokenProvider.java

@@ -137,7 +137,7 @@ void refresh() throws IOException {
 
       accessToken = responseBody.get(ACCESS_TOKEN).toString();
     } catch (Exception e) {
-      throw new IOException("Exception while refreshing access token", e);
+      throw new IOException("Unable to obtain access token from credential", e);
     }
   }
 }