[jira] [Created] (TS-5104) Wrong retry count for OSDNSLookup if url_expansions enabled

["Oknet Xu (JIRA)" <ji...@apache.org>]

Oknet Xu created TS-5104:
----------------------------

             Summary: Wrong retry count for OSDNSLookup if url_expansions enabled
                 Key: TS-5104
                 URL: https://issues.apache.org/jira/browse/TS-5104
             Project: Traffic Server
          Issue Type: Bug
          Components: HTTP
            Reporter: Oknet Xu


{code}
1674        HttpTransact::OSDNSLookup(State *s)
1675	{
1676	  static int max_dns_lookups = 3 + s->http_config_param->num_url_expansions;
1677	  ++s->dns_info.attempts;
{code}

The max_dns_lookups include :
- 1 for origin domain, for example: oknet
- 1 for default expansion, for example: www.oknet.com
- n for url_expansions_string list, for example: oknet.org, oknet.net

Thus, max_dns_lookups should be ```2 + s->http_config_param->num_url_expansions```

{code}
HttpTransact::HostNameExpansionError_t
6614	HttpTransact::try_to_expand_host_name(State *s)
a165134@andrewhsuInitial commit.
andrewhsu authored on 30 Oct 2009
6615	{
6616	  static int max_dns_lookups = 2 + s->http_config_param->num_url_expansions;
6617	  static int last_expansion  = max_dns_lookups - 2;
{code}

In the HttpTransact::try_to_expand_host_name, it is correct.



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