"unexpected EOF" on client.ExecuteWorkflow()

Community Support
1

When I try to execute the Workflow, I get unexpected EOF error.

// Start a workflow execution
we, err := c.ExecuteWorkflow(
	context.Background(),
	client.StartWorkflowOptions{
		ID:                                       "",
		TaskQueue:                                "ProcessIDs",
		WorkflowExecutionTimeout:                 0,
		WorkflowRunTimeout:                       0,
		WorkflowTaskTimeout:                      time.Minute * 5,
		WorkflowIDReusePolicy:                    0,
		WorkflowExecutionErrorWhenAlreadyStarted: false,
		CronSchedule:                             "",
	},
	workflows.ChunkIDsWorkflow,
	work,
)
if err != nil {
	log.Fatalf("Unable to execute workflow, %v", err) // error -> "unexpected EOF"
}

Why is this happening?

This is my workflows.ChunkIDsWorkflow func:

func ChunkIDsWorkflow(ctx workflow.Context, work ProcessWork) error {

	return nil
}

NOTE: VSCode does not report any kind of EOF error. In fact, it has no problems at all. I ran go fmt ./... and linting tools, everything is clean.

2

Can you show the full error trace? I’m unable to reproduce this and it kinda looks like issue with db driver?

3

I ran it with the debugger and it broke here:

// findmoduledatap looks up the moduledata for a PC.
//
// It is nosplit because it's part of the isgoexception
// implementation.
//
//go:nosplit
func findmoduledatap(pc uintptr) *moduledata {
	for datap := &firstmoduledata; datap != nil; datap = datap.next {
		if datap.minpc <= pc && pc < datap.maxpc {
			return datap // -> here
		}
	}
	return nil
}

What did you mean by “full error trace”?

4

What did you mean by “full error trace”?

stack trace of the error you received.

5

This is everything I get:

Starting: /home/user/go/bin/dlv dap --check-go-version=false --listen=127.0.0.1:39181 --log-dest=3 from /home/user/working/project-temporal/app/starter
DAP server listening at: 127.0.0.1:39181
Type 'dlv help' for list of commands.
2022/05/26 17:42:18 INFO  No logger configured for temporal client. Created default one.
2022/05/26 17:42:18 Unable to execute workflow, unexpected EOF
Process 3554 has exited with status 1
Detaching
dlv dap (3388) exited with code: 0
6

Thanks, this is pretty generic error so hard to tell. Seems related to VSCode runtime.

7

Now I shut down the Ubuntu, removed all Temporal related (every Docker image), wanted to boot it up on Windows and got this error:

Error response from daemon: Ports are not available: exposing port TCP 0.0.0.0:8088 -> 0.0.0.0:0: listen tcp 0.0.0.0:8088: bind: Only one usage of each socket address (protocol/network address/port) is normally permitted.

The weird thing is, Temporal now runs, but it errored and I can only stop it through Docker, since the terminal gave an error.

(Still getting EOF Error on starter).

8

Seems port 8088 is already used by some other application?

If this is local setup might be worth trying to clean everything up (make sure nothing is running first):

docker system prune -a
docker volume prune

and then try with one of the docker compose files here.

9

I have found the offending code for the “Unexpected EOF” error in the end. It was not Temporal, it was the data converter library (not Temporal’s) that was throwing a vague error…

Anyways, thank you for checking into it and thanks for the docker commands.

1 Like