rabbah commented on a change in pull request #3: support large arguments
URL: 
https://github.com/apache/incubator-openwhisk-runtime-docker/pull/3#discussion_r165839488
 
 

 ##########
 File path: core/actionProxy/actionproxy.py
 ##########
 @@ -127,18 +128,29 @@ def error(msg):
 
         try:
             input = json.dumps(args)
-            p = subprocess.Popen(
-                [self.binary, input],
-                stdout=subprocess.PIPE,
-                stderr=subprocess.PIPE,
-                env=env)
+            if len(input) > 131071:             # MAX_ARG_STRLEN (131071) 
linux/binfmts.h
+                # pass argument via stdin
 
 Review comment:
   The if/else could be simpler. 

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