ThalysonR opened a new issue, #9270:
URL: https://github.com/apache/apisix/issues/9270
### Description
I've been testing apisix and tried using otel plugin while transcoding to
grpc and got an error. I did try using the otel plugin with http and it works
fine, so I assume the problem is with the 2 plugins working together. This is
the error i got:
```
2023/04/08 05:21:57 [error] 56#56: *4242 lua entry thread aborted: runtime
error: ...deps/share/lua/5.1/opentelemetry/trace/exporter/otlp.lua:104: bad
argument #1 to 'encode' (type 'opentelemetry.proto.trace.v1.TracesData' does
not exists)
stack traceback:
coroutine 0:
[C]: in function 'encode'
...deps/share/lua/5.1/opentelemetry/trace/exporter/otlp.lua:104: in
function 'export_spans'
...are/lua/5.1/opentelemetry/trace/batch_span_processor.lua:45: in
function 'process_batches'
...are/lua/5.1/opentelemetry/trace/batch_span_processor.lua:77: in
function <...are/lua/5.1/opentelemetry/trace/batch_span_processor.lua:57>,
context: ngx.timer, client: 172.20.0.1, server: 0.0.0.0:9080
```
This is my config:
```
# config.yaml
plugins:
- grpc-transcode
- opentelemetry
opentelemetry:
resource:
service.name: APISIX
tenant.id: business_id
collector:
address: otel-collector:4318
request_timeout: 3
request_headers:
foo: bar
batch_span_processor:
drop_on_queue_full: false
max_queue_size: 6
batch_timeout: 2
inactive_timeout: 1
max_export_batch_size: 2
```
```
# apisix.yaml
routes:
- id: users
methods: [GET]
uri: /users
plugins:
grpc-transcode:
proto_id: "1"
service: users.UsersService
method: FindAll
opentelemetry:
sampler:
name: always_on
upstream:
scheme: grpc
type: roundrobin
nodes:
"users:5000": 1
```
The transcoding part works fine, I'm able to get the expected response from
the grpc service, just missing the otel trace.
Am I maybe using the plugins incorrectly?
### Environment
- APISIX version (run `apisix version`): 3.2.0 docker image
- Operating system (run `uname -a`): Ubuntu WSL2
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