[TS-4511] ATS crashes when no_dns_just_forward is configured without parent proxies

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 7.0.0
• Component/s: DNS, Parent Proxy
• Assignee: Uri Shachar
• Reporter: Uri Shachar
• Created: 07/Jun/16 10:54
• Updated: 07/Nov/16 23:25
• Resolved: 08/Jun/16 20:15

Description

When ATS is configured with:
CONFIG proxy.config.http.no_dns_just_forward_to_parent INT 1
(and parent routing is enabled)
and a request comes in that does not have a parent defined for it in parent.config ATS will abort with the following backtrace:

FATAL: HttpTransact.cc:7608: failed assertion `s->parent_result.result == PARENT_FAIL`
./bin/traffic_server(_ZN12HttpTransact18handle_parent_diedEPNS_5StateE+0x38)[0x6208fe]
./bin/traffic_server(_ZN12HttpTransact23HandleCacheOpenReadMissEPNS_5StateE+0x686)[0x60e868]
./bin/traffic_server(_ZN6HttpSM32call_transact_and_set_next_stateEPFvPN12HttpTransact5StateEE+0x71)[0x5f118d]
./bin/traffic_server(_ZN6HttpSM17handle_api_returnEv+0x102)[0x5dbd74]
./bin/traffic_server(_ZN6HttpSM14do_api_calloutEv+0x40)[0x5f876a]
./bin/traffic_server(_ZN6HttpSM14set_next_stateEv+0x75)[0x5f1347]
./bin/traffic_server(_ZN6HttpSM32call_transact_and_set_next_stateEPFvPN12HttpTransact5StateEE+0x1ae)[0x5f12ca]
./bin/traffic_server(_ZN6HttpSM14set_next_stateEv+0xb21)[0x5f1df3]
./bin/traffic_server(_ZN6HttpSM32call_transact_and_set_next_stateEPFvPN12HttpTransact5StateEE+0x1ae)[0x5f12ca]
./bin/traffic_server(_ZN6HttpSM17handle_api_returnEv+0x102)[0x5dbd74]
....

Issue Links

• duplicates: TS-3676 CONFIG proxy.config.http.no_dns_just_forward_to_parent triggers crash
• links to: GitHub Pull Request #698