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https://issues.apache.org/jira/browse/FLINK-28747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17574752#comment-17574752
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Till Rohrmann commented on FLINK-28747:
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I think this is Protobuf's behaviour. If Protobuf sees that a field has the
default value assigned, then it won't serialize this field. On the receiving
end where the message is deserialized, Protobuf will return the default value
for a missing field (for a string type it is the empty string).
> "target_id can not be missing" in HTTP statefun request
> -------------------------------------------------------
>
> Key: FLINK-28747
> URL: https://issues.apache.org/jira/browse/FLINK-28747
> Project: Flink
> Issue Type: Bug
> Components: Stateful Functions
> Affects Versions: statefun-3.0.0, statefun-3.2.0, statefun-3.1.1
> Reporter: Stephan Weinwurm
> Priority: Major
>
> Hi all,
> We've suddenly started to see the following exception in our HTTP statefun
> functions endpoints:
> {code}Traceback (most recent call last):
> File
> "/src/.venv/lib/python3.9/site-packages/uvicorn/protocols/http/h11_impl.py",
> line 403, in run_asgi
> result = await app(self.scope, self.receive, self.send)
> File
> "/src/.venv/lib/python3.9/site-packages/uvicorn/middleware/proxy_headers.py",
> line 78, in __call__
> return await self.app(scope, receive, send)
> File "/src/worker/baseplate_asgi/asgi/baseplate_asgi_middleware.py", line
> 37, in __call__
> await span_processor.execute()
> File "/src/worker/baseplate_asgi/asgi/asgi_http_span_processor.py", line
> 61, in execute
> raise e
> File "/src/worker/baseplate_asgi/asgi/asgi_http_span_processor.py", line
> 57, in execute
> await self.app(self.scope, self.receive, self.send)
> File "/src/.venv/lib/python3.9/site-packages/starlette/applications.py",
> line 124, in __call__
> await self.middleware_stack(scope, receive, send)
> File
> "/src/.venv/lib/python3.9/site-packages/starlette/middleware/errors.py", line
> 184, in __call__
> raise exc
> File
> "/src/.venv/lib/python3.9/site-packages/starlette/middleware/errors.py", line
> 162, in __call__
> await self.app(scope, receive, _send)
> File
> "/src/.venv/lib/python3.9/site-packages/starlette/middleware/exceptions.py",
> line 75, in __call__
> raise exc
> File
> "/src/.venv/lib/python3.9/site-packages/starlette/middleware/exceptions.py",
> line 64, in __call__
> await self.app(scope, receive, sender)
> File "/src/.venv/lib/python3.9/site-packages/starlette/routing.py", line
> 680, in __call__
> await route.handle(scope, receive, send)
> File "/src/.venv/lib/python3.9/site-packages/starlette/routing.py", line
> 275, in handle
> await self.app(scope, receive, send)
> File "/src/.venv/lib/python3.9/site-packages/starlette/routing.py", line
> 65, in app
> response = await func(request)
> File "/src/worker/baseplate_statefun/server/asgi/make_statefun_handler.py",
> line 25, in statefun_handler
> result = await handler.handle_async(request_body)
> File "/src/.venv/lib/python3.9/site-packages/statefun/request_reply_v3.py",
> line 262, in handle_async
> msg = Message(target_typename=sdk_address.typename,
> target_id=sdk_address.id,
> File "/src/.venv/lib/python3.9/site-packages/statefun/messages.py", line
> 42, in __init__
> raise ValueError("target_id can not be missing"){code}
> Interestingly, this has started to happen in three separate Flink deployments
> at the very same time. The only thing in common between the three deployments
> is that they consume the same Kafka topics.
> No deployments have happened when the issue started happening which was on
> July 28th 3:05PM. We have since been continuously seeing the error.
> We were also able to extract the request that Flink sends to the HTTP
> statefun endpoint:
> {code}{'invocation': {'target': {'namespace': 'com.x.dummy', 'type':
> 'dummy'}, 'invocations': [{'argument': {'typename':
> 'type.googleapis.com/v2_event.Event', 'has_value': True, 'value':
> '-redicated-'}}]}}
> {code}
> As you can see, no `id` field is present in the `invocation.target` object or
> the `target_id` was an empty string.
>
> This is our module.yaml from one of the Flink deployments:
>
> {code}
> version: "3.0"
> module:
> meta:
> type: remote
> spec:
> endpoints:
> - endpoint:
> meta:
> kind: io.statefun.endpoints.v1/http
> spec:
> functions: com.x.dummy/dummy
> urlPathTemplate: [http://x-worker-dummy.x-functions:9090/statefun]
> timeouts:
> call: 2 min
> read: 2 min
> write: 2 min
> maxNumBatchRequests: 100
> ingresses:
> - ingress:
> meta:
> type: io.statefun.kafka/ingress
> id: com.x/ingress
> spec:
> address: x-kafka-0.x.ue1.x.net:9092
> consumerGroupId: x-worker-dummy
> topics:
> - topic: v2_post_events
> valueType: type.googleapis.com/v2_event.Event
> targets:
> - com.x.dummy/dummy
> startupPosition:
> type: group-offsets
> autoOffsetResetPosition: earliest
> {code}
>
> Can you please help us investigate as this is critically impacting our prod
> setup?
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