[WORKFLOW SDK BUG] Get workflow state raising exception for instances that do not exist

[ajstewart]

Expected Behavior

When I run:

state = wf_client.get_workflow_state(instance_id=my_id)

I expect to receive a None response when the instance does not exist, as defined by the docs:

The current state of the workflow instance, or None if the workflow instance does not exist.

Actual Behavior

I am getting an Exception when the instance does not exist:

== APP == grpc._channel._InactiveRpcError: <_InactiveRpcError of RPC that terminated with:
== APP == 	status = StatusCode.UNKNOWN
== APP == 	details = "error from internal actor: no such instance exists"
== APP == 	debug_error_string = "UNKNOWN:Error received from peer ipv4:127.0.0.1:55008 {grpc_message:"error from internal actor: no such instance exists", grpc_status:2, created_time:"2024-10-23T10:46:36.084357+01:00"}"

Steps to Reproduce the Problem

The following small app can reproduce by calling the endpoint

import dapr.ext.workflow as wf
import uvicorn

from fastapi import FastAPI


def hello_world(ctx: wf.WorkflowActivityContext):
    """Hello world workflow."""
    return "Hello world!"


def dummy_workflow(ctx: wf.DaprWorkflowContext):
    """Dummy workflow."""
    result = yield ctx.call_activity(hello_world)
    return result


wf_runtime = wf.WorkflowRuntime()
wf_runtime.register_workflow(dummy_workflow)
wf_runtime.register_activity(hello_world)

wf_client = wf.DaprWorkflowClient()

wf_runtime.start()


app = FastAPI()


@app.get("/workflow/{instance_id}")
def get_workflow_state(instance_id: str):
    """Get the workflow state."""
    state = wf_client.get_workflow_state(instance_id=instance_id)

    if state is None:
        return {"message": "Workflow not found"}

    return {"status": state.runtime_status}


if __name__ == "__main__":
    uvicorn.run(app, host="0.0.0.0", port=5001)

Release Note

RELEASE NOTE:

[dapr-bot]

This issue has been automatically marked as stale because it has not had activity in the last 60 days. It will be closed in the next 7 days unless it is tagged (pinned, good first issue, help wanted or triaged/resolved) or other activity occurs. Thank you for your contributions.

[ajstewart]

Not stale

[alicejgibbons]

@ajstewart are you running this locally? and if so, can you share the dapr logs?

[ajstewart]

@alicejgibbons

There aren't any Dapr errors really, I'm assuming the SDK doesn't handle the not found.

Here's the end of the trace that concerns the Dapr bit:

== APP ==   File "/Users/me/github/dapr-test-app/dapr_example.py", line 32, in get_workflow_state
== APP ==     state = wf_client.get_workflow_state(instance_id=instance_id)
== APP ==             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/dapr/ext/workflow/dapr_workflow_client.py", line 123, in get_workflow_state
== APP ==     state = self.__obj.get_orchestration_state(instance_id, fetch_payloads=fetch_payloads)
== APP ==             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/durabletask/client.py", line 124, in get_orchestration_state
== APP ==     res: pb.GetInstanceResponse = self._stub.GetInstance(req)
== APP ==                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/grpc/_channel.py", line 1181, in __call__
== APP ==     return _end_unary_response_blocking(state, call, False, None)
== APP ==            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/grpc/_channel.py", line 1006, in _end_unary_response_blocking
== APP ==     raise _InactiveRpcError(state)  # pytype: disable=not-instantiable
== APP ==     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
== APP == grpc._channel._InactiveRpcError: <_InactiveRpcError of RPC that terminated with:
== APP == 	status = StatusCode.UNKNOWN
== APP == 	details = "error from internal actor: no such instance exists"
== APP == 	debug_error_string = "UNKNOWN:Error received from peer ipv4:127.0.0.1:52373 {created_time:"2025-01-23T09:21:00.692623+00:00", grpc_status:2, grpc_message:"error from internal actor: no such instance exists"}"
== APP == >

This is from just performing curl -v http://localhost:5001/workflow/test-not-found on the above demo service.

[alicejgibbons]

Hmm there should always be Dapr logs so maybe if you're running locally the Dapr logs are outputting to a file instead of the terminal?

Is there a .dapr/logs in the same folder if you're using a Dapr multi-app run file? It would be best to look at those sidecar logs since it seems like something is failing on workflow/scheduler set up. You can also change to console using daprdLogDestination: console in the multi-app run file.

[ajstewart]

I guess I meant to say there are Dapr logs but nothing really comes up around this problem, this is the full output with debug level logs:

dapr run --app-id test_app --app-port 5001 --resources-path components --enable-api-logging --log-level debug -- python dapr_example.py
ℹ️  Starting Dapr with id test_app. HTTP Port: 55434. gRPC Port: 55435
Flag --dapr-http-max-request-size has been deprecated, use '--max-body-size 4Mi'
Flag --dapr-http-read-buffer-size has been deprecated, use '--read-buffer-size 4Ki'
INFO[0000] Starting Dapr Runtime -- version 1.14.4 -- commit 583960dc90120616124b60ad2b7820fc0b3edf44  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] Log level set to: debug                       app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
WARN[0000] mTLS is disabled. Skipping certificate request and tls validation  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.security type=log ver=1.14.4
DEBU[0000] Loading config from file(s): /Users/me/.dapr/config.yaml  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] metric spec: {0x1400137ff10 <nil> <nil> []}   app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.diagnostics type=log ver=1.14.4
INFO[0000] Using default latency distribution buckets: [1 2 3 4 5 6 8 10 13 16 20 25 30 40 50 65 80 100 130 160 200 250 300 400 500 650 800 1000 2000 5000 10000 20000 50000 100000]  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.diagnostics type=log ver=1.14.4
WARN[0000] The default value for 'spec.metric.http.increasedCardinality' will change to 'false' in Dapr 1.15 or later  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.diagnostics type=log ver=1.14.4
DEBU[0000] Found 0 resiliency configurations in resources path  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] Initializing connection to Scheduler in the background  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
DEBU[0000] Attempting to connect to Scheduler at address: localhost:50006  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.scheduler.clients type=log ver=1.14.4
INFO[0000] Scheduler client initialized for address: localhost:50006  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.scheduler.clients type=log ver=1.14.4
INFO[0000] Scheduler client connections created          app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] standalone mode configured                    app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
DEBU[0000] Hot reloading disabled                        app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.hotreload type=log ver=1.14.4
INFO[0000] app id: test_app                              app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] metrics server started on :55436/             app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] Dapr trace sampler initialized: ParentBased{root:AlwaysOnSampler,remoteParentSampled:AlwaysOnSampler,remoteParentNotSampled:AlwaysOffSampler,localParentSampled:AlwaysOnSampler,localParentNotSampled:AlwaysOffSampler}  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] local service entry announced: test_app -> 192.168.0.194:55437  app_id=test_app component="nr (mdns/v1)" instance=My-MacBook-Pro.local scope=dapr.contrib type=log ver=1.14.4
INFO[0000] Initialized name resolution to mdns           app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] Loading components…                           app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
DEBU[0000] Found component: envvar-secret-store (secretstores.local.env/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
DEBU[0000] Found component: azure-blob-prod (bindings.azure.blobstorage/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
DEBU[0000] Loading component: envvar-secret-store (secretstores.local.env/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor type=log ver=1.14.4
INFO[0000] Component loaded: envvar-secret-store (secretstores.local.env/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor type=log ver=1.14.4
DEBU[0000] Loading component: azure-blob-prod (bindings.azure.blobstorage/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor type=log ver=1.14.4
DEBU[0000] Found component: azure-blob-data (bindings.azure.blobstorage/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] Using custom endpoint for Azure Blob Storage  app_id=test_app component="azure-blob-prod (bindings.azure.blobstorage/v1)" instance=My-MacBook-Pro.local scope=dapr.contrib type=log ver=1.14.4
INFO[0000] successful init for output binding (azure-blob-prod (bindings.azure.blobstorage/v1))  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor.binding type=log ver=1.14.4
INFO[0000] Component loaded: azure-blob-prod (bindings.azure.blobstorage/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor type=log ver=1.14.4
DEBU[0000] Loading component: azure-blob-data (bindings.azure.blobstorage/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor type=log ver=1.14.4
DEBU[0000] Found component: poison-queue (bindings.azure.storagequeues/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] Using custom endpoint for Azure Blob Storage  app_id=test_app component="azure-blob-data (bindings.azure.blobstorage/v1)" instance=My-MacBook-Pro.local scope=dapr.contrib type=log ver=1.14.4
INFO[0000] successful init for output binding (azure-blob-data (bindings.azure.blobstorage/v1))  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor.binding type=log ver=1.14.4
INFO[0000] Component loaded: azure-blob-data (bindings.azure.blobstorage/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor type=log ver=1.14.4
DEBU[0000] Loading component: poison-queue (bindings.azure.storagequeues/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor type=log ver=1.14.4
DEBU[0000] Found component: dapr-queue (bindings.azure.storagequeues/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] successful init for output binding (poison-queue (bindings.azure.storagequeues/v1))  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor.binding type=log ver=1.14.4
INFO[0000] Component loaded: poison-queue (bindings.azure.storagequeues/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor type=log ver=1.14.4
DEBU[0000] Loading component: dapr-queue (bindings.azure.storagequeues/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor type=log ver=1.14.4
DEBU[0000] Found component: my-oauth2-client-credentials (middleware.http.oauth2clientcredentials/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] successful init for input binding (dapr-queue (bindings.azure.storagequeues/v1))  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor.binding type=log ver=1.14.4
INFO[0000] Component loaded: dapr-queue (bindings.azure.storagequeues/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor type=log ver=1.14.4
DEBU[0000] Loading component: my-oauth2-client-credentials (middleware.http.oauth2clientcredentials/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor type=log ver=1.14.4
DEBU[0000] Found component: pubsub (pubsub.redis/v1)     app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] Adding middleware.http.oauth2clientcredentials/v1 my-oauth2-client-credentials middleware  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.middleware.http type=log ver=1.14.4
INFO[0000] Component loaded: my-oauth2-client-credentials (middleware.http.oauth2clientcredentials/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor type=log ver=1.14.4
DEBU[0000] Loading component: pubsub (pubsub.redis/v1)   app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor type=log ver=1.14.4
DEBU[0000] Found component: statestore (state.sqlite/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] Component loaded: pubsub (pubsub.redis/v1)    app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor type=log ver=1.14.4
DEBU[0000] Loading component: statestore (state.sqlite/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor type=log ver=1.14.4
INFO[0000] Waiting for all outstanding components to be processed…  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
DEBU[0000] prefix 'file:' added to the connection string  app_id=test_app component="statestore (state.sqlite/v1)" instance=My-MacBook-Pro.local scope=dapr.contrib type=log ver=1.14.4
DEBU[0000] Migrate: start                                app_id=test_app component="statestore (state.sqlite/v1)" instance=My-MacBook-Pro.local scope=dapr.contrib type=log ver=1.14.4
DEBU[0000] Migrate: ensure metadata table exists         app_id=test_app component="statestore (state.sqlite/v1)" instance=My-MacBook-Pro.local scope=dapr.contrib type=log ver=1.14.4
DEBU[0000] Migrate: load current migration level         app_id=test_app component="statestore (state.sqlite/v1)" instance=My-MacBook-Pro.local scope=dapr.contrib type=log ver=1.14.4
DEBU[0000] Migrate: current migration level: 1           app_id=test_app component="statestore (state.sqlite/v1)" instance=My-MacBook-Pro.local scope=dapr.contrib type=log ver=1.14.4
INFO[0000] Using 'statestore' as actor state store       app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor.state type=log ver=1.14.4
INFO[0000] Component loaded: statestore (state.sqlite/v1)  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor type=log ver=1.14.4
INFO[0000] All outstanding components processed          app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] Loading endpoints…                            app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] Waiting for all outstanding http endpoints to be processed…  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] All outstanding http endpoints processed      app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] Loading Declarative Subscriptions…            app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
DEBU[0000] Refreshing channels                           app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.channels type=log ver=1.14.4
DEBU[0000] Channels refreshed                            app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.channels type=log ver=1.14.4
INFO[0000] gRPC server listening on TCP address: :55435  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.grpc.api type=log ver=1.14.4
INFO[0000] Enabled gRPC tracing middleware               app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.grpc.api type=log ver=1.14.4
INFO[0000] Enabled gRPC metrics middleware               app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.grpc.api type=log ver=1.14.4
INFO[0000] Registering workflow engine for gRPC endpoint: [::]:55435  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.grpc.api type=log ver=1.14.4
INFO[0000] API gRPC server is running on port 55435      app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
WARN[0000] The default value for 'spec.metric.http.increasedCardinality' will change to 'false' in Dapr 1.15 or later  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.http type=log ver=1.14.4
INFO[0000] Enabled max body size HTTP middleware with size 4194304 bytes  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.http type=log ver=1.14.4
INFO[0000] Enabled tracing HTTP middleware               app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.http type=log ver=1.14.4
INFO[0000] Enabled metrics HTTP middleware               app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.http type=log ver=1.14.4
INFO[0000] HTTP server listening on TCP address: :55434  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.http type=log ver=1.14.4
INFO[0000] HTTP server is running on port 55434          app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] The request body size parameter is: 4194304 bytes  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] gRPC server listening on TCP address: :55437  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.grpc.internal type=log ver=1.14.4
INFO[0000] Enabled gRPC tracing middleware               app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.grpc.internal type=log ver=1.14.4
INFO[0000] Enabled gRPC metrics middleware               app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.grpc.internal type=log ver=1.14.4
INFO[0000] Internal gRPC server is running on :55437     app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] application protocol: http. waiting on port 5001.  This will block until the app is listening on that port.  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
== APP == 2025-01-23 15:49:26.421 durabletask-worker INFO: Starting gRPC worker that connects to dns:127.0.0.1:55435
INFO[0000] gRPC API Called                               app_id=test_app code=0 duration=0 instance=My-MacBook-Pro.local method=/TaskHubSidecarService/Hello scope=dapr.runtime.grpc.api-info type=log useragent="grpc-python/1.69.0 grpc-c/44.2.0 (osx; chttp2)" ver=1.14.4
== APP == 2025-01-23 15:49:26.436 durabletask-worker INFO: Successfully connected to dns:127.0.0.1:55435. Waiting for work items...
INFO[0000] work item stream established by user-agent: [grpc-python/1.69.0 grpc-c/44.2.0 (osx; chttp2)]  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.wfengine type=log ver=1.14.4
== APP == INFO:     Started server process [76463]
== APP == INFO:     Waiting for application startup.
== APP == INFO:     Application startup complete.
== APP == INFO:     Uvicorn running on http://0.0.0.0:5001 (Press CTRL+C to quit)
INFO[0000] application discovered on port 5001           app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
== APP == INFO:     127.0.0.1:55458 - "GET /dapr/config HTTP/1.1" 404 Not Found
INFO[0000] Application configuration loaded              app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] Configuring actors placement provider 'placement'. Configuration: 'placement:localhost:50005'  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actor type=log ver=1.14.4
INFO[0000] Configuring actor reminders provider 'default'. Configuration: ''  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actor type=log ver=1.14.4
INFO[0000] Actor runtime started. Idle timeout: 1h0m0s   app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actor type=log ver=1.14.4
INFO[0000] Configuring workflow engine with actors backend  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] Registering component for dapr workflow engine...  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
INFO[0000] Initializing Dapr workflow component          app_id=test_app component="dapr (workflow.dapr/v1)" instance=My-MacBook-Pro.local scope=dapr.contrib type=log ver=1.14.4
INFO[0000] Workflow engine initialized.                  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
DEBU[0000] Registered internal actor type 'dapr.internal.default.test_app.workflow'  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actor type=log ver=1.14.4
DEBU[0000] Registered internal actor type 'dapr.internal.default.test_app.activity'  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actor type=log ver=1.14.4
INFO[0000] worker started with backend dapr.actors/v1-beta  app_id=test_app instance=My-MacBook-Pro.local scope=wfengine.durabletask.backend type=log ver=1.14.4
INFO[0000] Workflow engine started                       app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.wfengine type=log ver=1.14.4
DEBU[0000] Actor backend is waiting for an activity actor to schedule an invocation.  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.wfengine.backend.actors type=log ver=1.14.4
DEBU[0000] Actor backend is waiting for a workflow actor to schedule an invocation.  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.wfengine.backend.actors type=log ver=1.14.4
DEBU[0000] try to connect to placement service: dns:///localhost:50005  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actors.placement type=log ver=1.14.4
== APP == INFO:     127.0.0.1:55458 - "GET /dapr/subscribe HTTP/1.1" 404 Not Found
INFO[0000] Scheduler stream connected                    app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.scheduler type=log ver=1.14.4
DEBU[0000] user app did not subscribe to any topic       app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor.subscription type=log ver=1.14.4
DEBU[0000] app responded with subscriptions []           app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.processor.subscription type=log ver=1.14.4
INFO[0000] dapr initialized. Status: Running. Init Elapsed 686ms  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime type=log ver=1.14.4
DEBU[0000] Established connection to placement service at dns:///localhost:50005  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actors.placement type=log ver=1.14.4
INFO[0000] HTTP API Called                               app_id=test_app code=204 duration=0 instance=My-MacBook-Pro.local method="PUT /v1.0/metadata/cliPID" scope=dapr.runtime.http-info size=0 type=log useragent=Go-http-client/1.1 ver=1.14.4
ℹ️  Updating metadata for appPID: 76463
INFO[0000] HTTP API Called                               app_id=test_app code=204 duration=0 instance=My-MacBook-Pro.local method="PUT /v1.0/metadata/appPID" scope=dapr.runtime.http-info size=0 type=log useragent=Go-http-client/1.1 ver=1.14.4
ℹ️  Updating metadata for app command: python dapr_example.py
INFO[0000] HTTP API Called                               app_id=test_app code=204 duration=0 instance=My-MacBook-Pro.local method="PUT /v1.0/metadata/appCommand" scope=dapr.runtime.http-info size=0 type=log useragent=Go-http-client/1.1 ver=1.14.4
✅  You're up and running! Both Dapr and your app logs will appear here.

DEBU[0002] Placement order received: lock                app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actors.placement type=log ver=1.14.4
DEBU[0002] Placement order received: update              app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actors.placement type=log ver=1.14.4
INFO[0002] Actor API level in the cluster has been updated to 10  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actor type=log ver=1.14.4
INFO[0002] Placement tables updated, version: 11         app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actors.placement type=log ver=1.14.4
DEBU[0002] Placement order received: unlock              app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actors.placement type=log ver=1.14.4
DEBU[0002] Starting to read reminders for actor type dapr.internal.default.test_app.workflow (migrate=true), with metadata id 00000000-0000-0000-0000-000000000000 and 0 partitions  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actor.reminders type=log ver=1.14.4
DEBU[0002] Read reminders from actors||dapr.internal.default.test_app.workflow without partition  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actor.reminders type=log ver=1.14.4
DEBU[0002] Finished reading reminders for actor type dapr.internal.default.test_app.workflow (migrate=true), with metadata id 00000000-0000-0000-0000-000000000000 and no partitions: total of 0 reminders  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actor.reminders type=log ver=1.14.4
DEBU[0002] Loaded 0 reminders for actor type dapr.internal.default.test_app.workflow  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actor.reminders type=log ver=1.14.4
DEBU[0002] Starting to read reminders for actor type dapr.internal.default.test_app.activity (migrate=true), with metadata id 00000000-0000-0000-0000-000000000000 and 0 partitions  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actor.reminders type=log ver=1.14.4
DEBU[0002] Read reminders from actors||dapr.internal.default.test_app.activity without partition  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actor.reminders type=log ver=1.14.4
DEBU[0002] Finished reading reminders for actor type dapr.internal.default.test_app.activity (migrate=true), with metadata id 00000000-0000-0000-0000-000000000000 and no partitions: total of 0 reminders  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actor.reminders type=log ver=1.14.4
DEBU[0002] Loaded 0 reminders for actor type dapr.internal.default.test_app.activity  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.runtime.actor.reminders type=log ver=1.14.4
DEBU[0006] Workflow actor 'test-not-found': invoking method 'GetWorkflowMetadata'  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.wfengine.backend.actors type=log ver=1.14.4
DEBU[0006] Workflow actor 'test-not-found': loading workflow state  app_id=test_app instance=My-MacBook-Pro.local scope=dapr.wfengine.backend.actors type=log ver=1.14.4
INFO[0006] gRPC API Called                               app_id=test_app code=2 duration=0 instance=My-MacBook-Pro.local method=/TaskHubSidecarService/GetInstance scope=dapr.runtime.grpc.api-info type=log useragent="grpc-python/1.69.0 grpc-c/44.2.0 (osx; chttp2)" ver=1.14.4
== APP == INFO:     127.0.0.1:55473 - "GET /workflow/test-not-found HTTP/1.1" 500 Internal Server Error
== APP == ERROR:    Exception in ASGI application
== APP == Traceback (most recent call last):
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/uvicorn/protocols/http/httptools_impl.py", line 409, in run_asgi
== APP ==     result = await app(  # type: ignore[func-returns-value]
== APP ==              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/uvicorn/middleware/proxy_headers.py", line 60, in __call__
== APP ==     return await self.app(scope, receive, send)
== APP ==            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/fastapi/applications.py", line 1054, in __call__
== APP ==     await super().__call__(scope, receive, send)
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/starlette/applications.py", line 113, in __call__
== APP ==     await self.middleware_stack(scope, receive, send)
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/starlette/middleware/errors.py", line 187, in __call__
== APP ==     raise exc
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/starlette/middleware/errors.py", line 165, in __call__
== APP ==     await self.app(scope, receive, _send)
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/starlette/middleware/exceptions.py", line 62, in __call__
== APP ==     await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send)
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/starlette/_exception_handler.py", line 62, in wrapped_app
== APP ==     raise exc
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/starlette/_exception_handler.py", line 51, in wrapped_app
== APP ==     await app(scope, receive, sender)
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/starlette/routing.py", line 715, in __call__
== APP ==     await self.middleware_stack(scope, receive, send)
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/starlette/routing.py", line 735, in app
== APP ==     await route.handle(scope, receive, send)
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/starlette/routing.py", line 288, in handle
== APP ==     await self.app(scope, receive, send)
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/starlette/routing.py", line 76, in app
== APP ==     await wrap_app_handling_exceptions(app, request)(scope, receive, send)
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/starlette/_exception_handler.py", line 62, in wrapped_app
== APP ==     raise exc
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/starlette/_exception_handler.py", line 51, in wrapped_app
== APP ==     await app(scope, receive, sender)
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/starlette/routing.py", line 73, in app
== APP ==     response = await f(request)
== APP ==                ^^^^^^^^^^^^^^^^
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/fastapi/routing.py", line 301, in app
== APP ==     raw_response = await run_endpoint_function(
== APP ==                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/fastapi/routing.py", line 214, in run_endpoint_function
== APP ==     return await run_in_threadpool(dependant.call, **values)
== APP ==            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/starlette/concurrency.py", line 39, in run_in_threadpool
== APP ==     return await anyio.to_thread.run_sync(func, *args)
== APP ==            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/anyio/to_thread.py", line 56, in run_sync
== APP ==     return await get_async_backend().run_sync_in_worker_thread(
== APP ==            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/anyio/_backends/_asyncio.py", line 2461, in run_sync_in_worker_thread
== APP ==     return await future
== APP ==            ^^^^^^^^^^^^
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/anyio/_backends/_asyncio.py", line 962, in run
== APP ==     result = context.run(func, *args)
== APP ==              ^^^^^^^^^^^^^^^^^^^^^^^^
== APP ==   File "/Users/me/github/dapr-test-app/dapr_example.py", line 32, in get_workflow_state
== APP ==     state = wf_client.get_workflow_state(instance_id=instance_id)
== APP ==             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/dapr/ext/workflow/dapr_workflow_client.py", line 123, in get_workflow_state
== APP ==     state = self.__obj.get_orchestration_state(instance_id, fetch_payloads=fetch_payloads)
== APP ==             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/durabletask/client.py", line 124, in get_orchestration_state
== APP ==     res: pb.GetInstanceResponse = self._stub.GetInstance(req)
== APP ==                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/grpc/_channel.py", line 1181, in __call__
== APP ==     return _end_unary_response_blocking(state, call, False, None)
== APP ==            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
== APP ==   File "/opt/homebrew/Caskroom/mambaforge/base/envs/dapr-test-app/lib/python3.11/site-packages/grpc/_channel.py", line 1006, in _end_unary_response_blocking
== APP ==     raise _InactiveRpcError(state)  # pytype: disable=not-instantiable
== APP ==     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
== APP == grpc._channel._InactiveRpcError: <_InactiveRpcError of RPC that terminated with:
== APP == 	status = StatusCode.UNKNOWN
== APP == 	details = "error from internal actor: no such instance exists"
== APP == 	debug_error_string = "UNKNOWN:Error received from peer ipv4:127.0.0.1:55435 {grpc_message:"error from internal actor: no such instance exists", grpc_status:2, created_time:"2025-01-23T15:49:32.189815+00:00"}"
== APP == >

[elena-kolevska]

Hey @ajstewart , this error in fact comes from Dapr. It is a confusing error message but it has since been updated to no such instance exists in the latest (1.15.0 rc7) release.
I'll send a PR to do the try/catch in the sdk itself, so you don't have to do it as a user.

[ajstewart]

Thanks @elena-kolevska.

I guess it was because the docs said it should return None, personally I also prefer the error being raised explicitly like it is.

[elena-kolevska]

Hey @ajstewart, here's a PR that addresses this: #771
Feel free to review and give your thoughts.

[elena-kolevska]

The PR is now merged and will be a part of the next release (1.15.0).