rabbah commented on a change in pull request #119: Ack and versioning [work in
progress]
URL:
https://github.com/apache/openwhisk-runtime-go/pull/119#discussion_r370102036
##########
File path: docs/ACTION.md
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@@ -73,10 +73,12 @@ The `actionloop` runtime can execute generic Linux
executable in an efficient w
<a name="actionloop">
-### The Action Loop Protocol
+### The Action Loop Protocol
The protocol can be specified informally as follow.
+- Send an acknowledgement if required. If the environment variable
`__OW_WAIT_FOR_ACK` is not empty, write on file descriptor 3 the string `{
"ok": true }`.
Review comment:
or below in the envvars readme.
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