Error in OpenTelemetry With Istio - OcAgent trace exporter: Export() failed: UNKNOWN: sending queue is full

[MikeWang0731]

Describe the question
I'm using OpenTelemetry as a tracing collector in istio, but after running OpenTelemetry Collector for a while, the logs for istio-ingressgateway and the logs for Sidecar (istio-proxy) in the Pod keep printing OcAgent trace exporter: Export() failed: UNKNOWN: sending queue is full. I also tried to change the queue_size field in the OpenTelemetry Config, but it didn't fix the problem.

What did you expect to see?
Normal ingressgateway logs with various information about traffic, etc.

What did you see instead?

What version did you use?
Istio 1.15.7
OpenTelemetry Collector 0.91 or 0.92

What config did you use?
otel config

receivers:
  opencensus:
    max_recv_msg_size_mib: 10
    endpoint: 0.0.0.0:55678
  otlp:
    protocols:
      http:
        endpoint: 0.0.0.0:4318
      grpc:
        endpoint: 0.0.0.0:4317
processors:
  memory_limiter:
    limit_mib: 32000
    spike_limit_mib: 1000
    check_interval: 2s
exporters:
  zipkin/nontls:
    sending_queue:
      queue_size: 10000
    endpoint: <A Jaeger Backend>
  kafka:
    sending_queue:
      queue_size: 10000
      ......
  logging:
    loglevel: debug
service:
  pipelines:
    ....

Istio operator yaml

meshConfig:
    accessLogEncoding: JSON
    accessLogFile: /dev/stdout
    accessLogFormat: ...
    defaultConfig:
      holdApplicationUntilProxyStarts: true
      proxyMetadata:
        EXIT_ON_ZERO_ACTIVE_CONNECTIONS: 'true'
        ISTIO_META_DNS_AUTO_ALLOCATE: 'true'
        ISTIO_META_DNS_CAPTURE: 'true'
      tracing:
        max_path_tag_length: 256
        openCensusAgent:
          address: dns:opentelemetry-collector.istio-system.svc.cluster.local:55678
          context:
            - B3
        sampling: 100
    defaultProviders:
      tracing:
        - opencensus
    enableTracing: true
    extensionProviders:
      - name: opencensus
        opencensus:
          context:
            - B3
          port: 55678
          service: opentelemetry-collector.istio-system.svc.cluster.local
      - envoyExtAuthzGrpc:
          port: '9898'
          service: local-opa-grpc.local
        name: opa.local
  profile: default
  tag: 1.15.0
  values:
      .....
      tracer:
        zipkin:
          address: jaeger-collector-headless.jaeger-system.svc.cluster.local:9411