Set fielddata=true on [localEndpoint.serviceName] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead.

[heppytt]

I used openzipkin / Zipkin 2.21.6 and es6.8.10. i see https://github.com/openzipkin/zipkin/issues/2388 is not solve my question。

[codefromthecrypt]

Very likely the index template of elasticsearch conflicts with another template or somehow it did not install.

you can check some comments here https://github.com/openzipkin/zipkin-support/issues/23#issuecomment-653547886

or you can join gitter for questions https://gitter.im/openzipkin/zipkin

good luck