sijie commented on a change in pull request #4577: fix issue when submitting 
NAR via file url
URL: https://github.com/apache/pulsar/pull/4577#discussion_r298827578
 
 

 ##########
 File path: 
pulsar-functions/utils/src/main/java/org/apache/pulsar/functions/utils/SinkConfigUtils.java
 ##########
 @@ -318,79 +322,89 @@ public static ExtractedSinkDetails validate(SinkConfig 
sinkConfig, Path archiveP
             throw new IllegalArgumentException("Sink timeout must be a 
positive number");
         }
 
-        String sinkClassName;
-        final Class<?> typeArg;
-        final ClassLoader classLoader;
-        if (!isEmpty(sinkConfig.getClassName())) {
-            sinkClassName = sinkConfig.getClassName();
-            // We really don't know if we should use nar class loader or 
regular classloader
-            ClassLoader jarClassLoader = null;
-            ClassLoader narClassLoader = null;
-            try {
-                jarClassLoader = 
FunctionCommon.extractClassLoader(archivePath, uploadedInputStreamAsFile);
-            } catch (Exception e) {
+
+        Class<?> typeArg;
+        ClassLoader classLoader;
+        String sinkClassName = sinkConfig.getClassName();
+        ClassLoader jarClassLoader = null;
+        ClassLoader narClassLoader = null;
+        try {
+            jarClassLoader = FunctionCommon.extractClassLoader(archivePath, 
sinkPackageFile);
+        } catch (Exception e) {
 
 Review comment:
   I am not sure we should use suffix for this. These days more and more 
applications don't use suffix for checking if the file is the expected type. 

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