Exemplar OTel: Fix exemplar for otel to use traceId instead of spanId and sample only if trace is sampled #6197
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…only if trace is sampled. Signed-off-by: jianwu <jianwu@gmail.com>
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Changes
Fix the exemplar for otel to use correct traceId
Verification
We identified this bug when we enabled the exemplar in Grafana, the tracedId value is by mistake to assigned with spanId which causes broken link to jaeger trace ui. After the fix, we verified everything works fine.