Imports github.com/uber/jaeger-lib/metrics/expvar golang.org/x/sync/errgroup github.com/uber/jaeger-client-go/log github.com/uber/jaeger-client-go/config github.com/olivere/elastic github.com/olivere/elastic/trace/opentracing Standard library imports context encoding/base64 errors flag fmt log math/rand net/http sync/atomic time