Dropped * spans because maxQueueSize reached.

[jholm117]

Hello! We are seeing this error message from our otel-instrumented app with varying span amounts roughly every 5 seconds.

Dropped 2228 spans because maxQueueSize reached

I've tried increasing the maxQueueSize to 6144 (the default is 2048).

const sdk = new NodeSDK({
  autoDetectResources: true,
  traceExporter: exporter,
  spanProcessor: new BatchSpanProcessor(exporter, {
    maxQueueSize: 6144,
  }),

but this did not seem to affect the behavior at all. Is someone able to recommend a way to look into diagnosing/fixing this issue?

• This only affects the JavaScript OpenTelemetry library
• This may affect other libraries, but I would like to get opinions here first

[pichlermarc]

Hi @jholm117, thanks for reaching out.

I'm closing this as a duplicate of #3094. The BatchSpanProcessor does not eager-export at the moment, which means that if the queue size is reached, it will not attempt to export but actually drop the spans that exceed the limit. There are several PRs open for #3094, so you can expect this to be addressed in an upcoming release.

[jholm117]

Hello, unfortunately I'm still seeing this on version 1.26.0 of @opentelemetry/sdk-trace-base. Any ideas?