maixiaohai commented on issue #581:
URL:
https://github.com/apache/rocketmq-client-go/issues/581#issuecomment-753862864
I change the log level and print as follows
```send trace data success:
SendResult="%!v(PANIC=String method: runtime error: invalid memory address or
nil pointer dereference)"```
Then I use **InvokeSync** method to send trace message, it return the **acl
exception**. I add Credentials parameters with traceCfg, it worked.
I'am green to Go language, If the print log `send success` meet our
expectation?
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