[GitHub] [apisix] akalittle opened a new issue, #7674: help request: opentelemetry error in lua script

[GitBox]

akalittle opened a new issue, #7674:
URL: https://github.com/apache/apisix/issues/7674

   ### Description
   
   When I  try to implement opentelemetry into my route.
   There are some errors in the Lua script. 
   
   <img width="443" alt="image" 
src="https://user-images.githubusercontent.com/38489160/184594640-4c1f4d68-24b7-4c79-bb1e-7fc1399af226.png";>
   
   
   
   
   
   ```yaml
   plugins:
     - api-breaker
     - authz-keycloak
     - basic-auth
     - ...
     - opentelemetry
   pluginAttrs:
     opentelemetry:
   #    trace_id_source: x-api-key
       resource:
         service.name: APISIX
   #      tenant.id: business_id
       collector:
         address: 
opentelemetry-deploy-opentelemetry-collector.apisix-istio.svc.cluster.local:4318
         request_timeout: 3
       batch_span_processor:
         drop_on_queue_full: false
         max_queue_size: 6
         batch_timeout: 2
         inactive_timeout: 1
         max_export_batch_size: 2
   
   ```
   
   
   ```
   2022/08/15 07:28:33 [error] 49#49: *9205 lua entry thread aborted: runtime 
error: bad argument #1 to '?' (invalid value)
   stack traceback:
   coroutine 0:
        [C]: in function 'gsub'
        ...deps/share/lua/5.1/opentelemetry/trace/exporter/otlp.lua:18: in 
function 'hex2bytes'
        ...deps/share/lua/5.1/opentelemetry/trace/exporter/otlp.lua:50: in 
function 'export_spans'
        ...are/lua/5.1/opentelemetry/trace/batch_span_processor.lua:18: in 
function 'process_batches'
        ...are/lua/5.1/opentelemetry/trace/batch_span_processor.lua:46: in 
function <...are/lua/5.1/opentelemetry/trace/batch_span_processor.lua:29>, 
context: ngx.timer, client: 127.0.0.6, server: 0.0.0.0:9080
   
   ```
   
   ### Environment
   
   apache/apisix:2.15.0-alpine
   apache/apisix-ingress-controller:1.4.1
   docker.io/bitnami/etcd:3.5.4-debian-11-r14
   
   Kubernetes cluster version:
   Client Version: v1.24.0
   Kustomize Version: v4.5.4
   Server Version: v1.21.12-gke.2200


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