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Phil Sorber commented on TS-2134: --------------------------------- Moving out to 6.0.0. > SRV lookup does not handle failover correctly > --------------------------------------------- > > Key: TS-2134 > URL: https://issues.apache.org/jira/browse/TS-2134 > Project: Traffic Server > Issue Type: Bug > Components: DNS, HTTP > Reporter: Thach Tran > Assignee: Alan M. Carroll > Labels: review > Fix For: 6.0.0 > > Attachments: ats.log, ts2134.patch > > > I'm seeing an issue with SRV lookup in ATS in which the proxy doesn't fail > over to alternative origins once the first choice is marked as down. > To reproduce this, I'm running dnsmasq as a local resolver to serve up the > test SRV records. My configuration is as follows. > h4. records.config > CONFIG proxy.config.dns.nameservers STRING 127.0.0.1 > CONFIG proxy.config.dns.resolv_conf STRING NULL > CONFIG proxy.config.srv_enabled INT 1 > h4. remap.config > regex_remap http://.*:8080/ https://noexample.com/ > h4. dnsmasq.conf (srv records config) > srv-host=_http._tcp.noexample.com,abc.com,443,0,100 > srv-host=_http._tcp.noexample.com,google.com,443,1,100 > The intention is since the srv lookup for _http._tcp.noexample.com returns > abc.com:443 and google.com:443 with abc.com:443 being the one with higher > priority, the proxy should try that first and once the connection to > abc.com:443 is marked as down (up to 6 retries by default), google.com:443 > should be tried next and the connection should succeed then. > However, testing with the following curl command multiple times still gives > back 502. > $ curl -v http://localhost:8080/ > Debug log seems to suggest it always attempts abc.com:443. -- This message was sent by Atlassian JIRA (v6.3.4#6332)