# "unexpected EOF" on client.ExecuteWorkflow()

**URL:** <https://community.temporal.io/t/unexpected-eof-on-client-executeworkflow/4804>\
**Category:** Community Support\
**Tags:** go-sdk\
**Created:** [May 26, 2022, 10:15am UTC](https://community.temporal.io/t/unexpected-eof-on-client-executeworkflow/4804 "2022-05-26T10:15:01Z")\
**Posts on this page:** 9\
**Page:** 1

<div class="post-metadata">

**Author:** ![Delicious\_Bacon](https://sea2.discourse-cdn.com/flex016/user_avatar/community.temporal.io/delicious_bacon/32/2001_2.png) [@Delicious\_Bacon](https://community.temporal.io/u/Delicious_Bacon)\
**Post date:** [May 26, 2022, 10:15am UTC](https://community.temporal.io/t/unexpected-eof-on-client-executeworkflow/4804/1 "2022-05-26T10:15:01Z")

</div>

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

```auto
// 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:

```auto
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.

---

<div class="post-metadata">

**Author:** ![tihomir](https://sea2.discourse-cdn.com/flex016/user_avatar/community.temporal.io/tihomir/32/6580_2.png) [@tihomir](https://community.temporal.io/u/tihomir)\
**Post date:** [May 26, 2022, 3:40pm UTC](https://community.temporal.io/t/unexpected-eof-on-client-executeworkflow/4804/2 "2022-05-26T15:40:26Z")

</div>

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

---

<div class="post-metadata">

**Author:** ![Delicious\_Bacon](https://sea2.discourse-cdn.com/flex016/user_avatar/community.temporal.io/delicious_bacon/32/2001_2.png) [@Delicious\_Bacon](https://community.temporal.io/u/Delicious_Bacon)\
**Post date:** [May 26, 2022, 3:42pm UTC](https://community.temporal.io/t/unexpected-eof-on-client-executeworkflow/4804/3 "2022-05-26T15:42:58Z")

</div>

I ran it with the debugger and it broke here:

```auto
// 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”?

---

<div class="post-metadata">

**Author:** ![tihomir](https://sea2.discourse-cdn.com/flex016/user_avatar/community.temporal.io/tihomir/32/6580_2.png) [@tihomir](https://community.temporal.io/u/tihomir)\
**Post date:** [May 26, 2022, 3:47pm UTC](https://community.temporal.io/t/unexpected-eof-on-client-executeworkflow/4804/4 "2022-05-26T15:47:47Z")

</div>

> What did you mean by “full error trace”?

stack trace of the error you received.

---

<div class="post-metadata">

**Author:** ![Delicious\_Bacon](https://sea2.discourse-cdn.com/flex016/user_avatar/community.temporal.io/delicious_bacon/32/2001_2.png) [@Delicious\_Bacon](https://community.temporal.io/u/Delicious_Bacon)\
**Post date:** [May 26, 2022, 3:50pm UTC](https://community.temporal.io/t/unexpected-eof-on-client-executeworkflow/4804/5 "2022-05-26T15:50:25Z")

</div>

This is everything I get:

```auto
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

```

---

<div class="post-metadata">

**Author:** ![tihomir](https://sea2.discourse-cdn.com/flex016/user_avatar/community.temporal.io/tihomir/32/6580_2.png) [@tihomir](https://community.temporal.io/u/tihomir)\
**Post date:** [May 26, 2022, 4:09pm UTC](https://community.temporal.io/t/unexpected-eof-on-client-executeworkflow/4804/6 "2022-05-26T16:09:52Z")

</div>

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

---

<div class="post-metadata">

**Author:** ![Delicious\_Bacon](https://sea2.discourse-cdn.com/flex016/user_avatar/community.temporal.io/delicious_bacon/32/2001_2.png) [@Delicious\_Bacon](https://community.temporal.io/u/Delicious_Bacon)\
**Post date:** [May 26, 2022, 4:17pm UTC](https://community.temporal.io/t/unexpected-eof-on-client-executeworkflow/4804/7 "2022-05-26T16:17:10Z")

</div>

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

```auto
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).

---

<div class="post-metadata">

**Author:** ![tihomir](https://sea2.discourse-cdn.com/flex016/user_avatar/community.temporal.io/tihomir/32/6580_2.png) [@tihomir](https://community.temporal.io/u/tihomir)\
**Post date:** [May 26, 2022, 4:35pm UTC](https://community.temporal.io/t/unexpected-eof-on-client-executeworkflow/4804/8 "2022-05-26T16:35:19Z")

</div>

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):

```auto
docker system prune -a
docker volume prune

```

and then try with one of the docker compose files [here](https://github.com/temporalio/docker-compose).

---

<div class="post-metadata">

**Author:** ![Delicious\_Bacon](https://sea2.discourse-cdn.com/flex016/user_avatar/community.temporal.io/delicious_bacon/32/2001_2.png) [@Delicious\_Bacon](https://community.temporal.io/u/Delicious_Bacon)\
**Post date:** [May 30, 2022, 10:16am UTC](https://community.temporal.io/t/unexpected-eof-on-client-executeworkflow/4804/9 "2022-05-30T10:16:15Z")

</div>

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.