TraceContext.traceId() always return [Ignored Trace]

[qlql489]

Please answer these questions before submitting your issue.

• Why do you submit this issue?
• Question or discussion
• Bug
• Requirement
• Feature or performance improvement

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Question

• What do you want to know?
  we hava 100+ services use skywalking, and log TraceContext.traceId(), but in some services
  always get [Ignored Trace], we not set sampling or IGNORE_SUFFIX, so what's the reason?

Bug

• Which version of SkyWalking, OS and JRE?
  6.2

• Which company or project?

• What happen?
  If possible, provide a way for reproducing the error. e.g. demo application, component version.

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Requirement or improvement

• Please describe about your requirements or improvement suggestions.

[wu-sheng]

You need to find out why IgnoredTracerContext created. In my mind, either agent hasn't registered to backend successfully, or sampling/ignore mechanism is working. No other case.