the problem of upstream log printing

[15717900]

hello,


      The upstream address printed in the log ($upstream_addr 
field) sometimes prints all configured upstream addresses. May I ask if it is a 
configuration problem or a bug in the program. How should I solve it?


      for example 
      upstreams config: 
192.168.1.1:11000,192.168.1.2:11000,11000,192.168.1.3:11000 
      normal log??192.168.1.1:11000
      problem 
log??192.168.1.1:11000,192.168.1.2:11000,11000,192.168.1.3:11000 


Looking forward to answer??thanks