smalenfant opened a new issue, #9816:
URL: https://github.com/apache/trafficserver/issues/9816

   We found some extraneous logs in our lab server running ATS 9.2.1. It looks 
like it is not expecting text after a `204` status code but the extra length 
seems to be attributable to the text string `No content`. 
   
   At first, looks like this might have been related to #9330 and #9333 but 
they have been merged in 9.2.1. 
   
   Log entry:
   
   ```
   WARNING: OpenReadHead failed for cachekey 809A6934 : alternate content 
length doesn't match doc_len 10 != 0
   ```
   
   curl command we've been able to use to reproduce (internally):
   
   ```
   # curl 
'http://cdn.de2scvmedia.cdn1.coxlab.net/scm/ODCconfig/ServiceGroup?system=1902&QAMNameList=4501,4502'
 -v -4 
   > GET /scm/ODCconfig/ServiceGroup?system=1902&QAMNameList=4501,4502 HTTP/1.1
   > Host: cdn.de2scvmedia.cdn1.coxlab.net
   > User-Agent: curl/7.76.1
   > Accept: */*
   > 
   * Mark bundle as not supporting multiuse
   < HTTP/1.1 204 No Content
   < X-Cox-Request-Id: rEbSa6_SN_gEzHMP
   < Date: Fri, 09 Jun 2023 12:13:19 GMT
   < X-Cacheable: YES
   < Varnish-TTL: 3600.000
   < X-Varnish: 423353 423190
   < Age: 875
   < Via: 1.1 varnish (Varnish/6.1), http/1.1 psp6cdmid04.coxlab.net (11590.el7 
[uScSsSfUpSeN:t cCSp sS]), http/1.1 psp6cdedge09.coxlab.net (13890.el7 
[uScSsSfUpSeN:t cCSpSs ])
   < X-Served-By: de2scvcache02
   < X-Cache: HIT
   < X-Cache-Hits: 1
   < Server: 13890.el7
   < Connection: keep-alive
   < 
   * Excess found: excess = 10 url = /scm/ODCconfig/ServiceGroup (zero-length 
body)
   * Connection #0 to host cdn.de2scvmedia.cdn1.coxlab.net left intact
   ```


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