fn invoke with java fdk helloworld gives 502 error

[sachin-pikle]

I tried running a HelloWorld java using triggers and fn invoke... and I get a 502 in invoke.

fn init --runtime java --trigger http sac-java-t-fn

FN_REGISTRY=demouser fn -v deploy --app db-app --local --no-bump

curl http://localhost:8080/t/db-app/sac-java-t-fn-trigger

Curl works but I get a 502 error for Java helloworld fn invoke below:

fn invoke db-app sac-java-t-fn
{"message":"container exit code 2"}

Fn: Error calling function: status 502

See 'fn --help' for more information. Client version: 0.4.150

[zootalures]

This is because the Java FDK is expecting FN_PATH and FN_REQUEST_URL to be set

Required environment variable FN_PATH is not set - are you running a function outside of fn run?

[zootalures]

Invoke has changed the expected call contract and the Java FDK has not been updated to reflect that change.

[sachin-pikle]

Is this an easy fix?

[michael-w-williams]

I tried the same thing and I get a 404 "Route not found" error using either call or invoke. Curl works fine.

[michael-w-williams]

More information after working on the node.js tutorial. Node.js is also giving me a 404 "Route not found" with fn call. The fn invoke command works fine. So taking the error message at face value I added a route:

fn create route nodeapp /nodefn fndemouser/nodefn:0.0.2

Now call works if you specify the content type. So fn call simply needs to look for a trigger rather than a route in the future.

[sachin-pikle]

Mike - Routes will be deprecated.
Routes uses fn call and Triggers uses fn invoke. So as long as fn invoke works we should not worry about routes as that is going away soon.

[gviedma-zz]

Note that this issue originates on the server-side (not on the CLI), and it affects all FDKs. A fix is available on fnproject/fn#1192