Yiyiyimu opened a new issue #3618:
URL: https://github.com/apache/apisix/issues/3618
### Issue description
```
# Failed test 'TEST 1: get APISIX-EUREKA info from EUREKA - status code ok'
# at /home/runner/work/apisix/apisix/test-nginx/lib/Test/Nginx/Socket.pm
line 948.
# got: '503'
# expected: '200'
# Failed test 'TEST 1: get APISIX-EUREKA info from EUREKA -
response_body_like - response is expected (<html> <head><title>503 Service
Temporarily Unavailable</title></head> <body> <center><h1>503 Service
Temporarily Unavailable</h1></center> <hr><center>openresty/1.19.3.1</center>
</body> </html>)'
# at /home/runner/work/apisix/apisix/test-nginx/lib/Test/Nginx/Socket.pm
line 1635.
# '<html>
# <head><title>503 Service Temporarily Unavailable</title></head>
# <body>
# <center><h1>503 Service Temporarily Unavailable</h1></center>
# <hr><center>openresty/1.19.3.1</center>
# </body>
# </html>
# '
# doesn't match '(?^s:.*<name>APISIX-EUREKA</name>.*
# )'
Error: led test 'TEST 1: get APISIX-EUREKA info from EUREKA - pattern
"[error]" should not match any line in error.log but matches line "2021/02/20
04:48:45 [error] 9881#9881: *2 [lua] eureka.lua:226: nodes(): failed to fetch
nodes for : APISIX-EUREKA, client: 127.0.0.1, server: localhost, request: \"GET
/eureka/apps/APISIX-EUREKA HTTP/1.1\", host: \"localhost\"" (req 0)
# 2021/02/20 04:48:45 [info] 9881#9881: *2 [lua] upstream.lua:168:
set_upstream(): discover new upstream from APISIX-EUREKA, type eureka:
{"service_name":"APISIX-EUREKA","type":"roundrobin","parent":{"modifiedIndex":1613796524,"has_domain":false,"value":{"uri":"\/eureka\/*","upstream":{"service_name":"APISIX-EUREKA","type":"roundrobin","parent":"table:
0x7fb1cda2b930","hash_on":"vars","scheme":"http","discovery_type":"eureka","pass_host":"pass"},"priority":0,"status":1,"id":"routes#1"},"clean_handlers":{},"key":"\/routes\/arr_1"},"hash_on":"vars","scheme":"http","discovery_type":"eureka","pass_host":"pass"},
client: 127.0.0.1, server: localhost, request: "GET /eureka/apps/APISIX-EUREKA
HTTP/1.1", host: "localhost"
# '
# at /home/runner/work/apisix/apisix/test-nginx/lib/Test/Nginx/Socket.pm
line 1280.
Error: led test 'TEST 1: get APISIX-EUREKA info from EUREKA - pattern
"[error]" should not match any line in error.log but matches line "2021/02/20
04:48:45 [error] 9881#9881: *2 [lua] init.lua:441: http_access_phase(): failed
to set upstream: no valid upstream node, client: 127.0.0.1, server: localhost,
request: \"GET /eureka/apps/APISIX-EUREKA HTTP/1.1\", host: \"localhost\"" (req
0)
# '
# at /home/runner/work/apisix/apisix/test-nginx/lib/Test/Nginx/Socket.pm
line 1280.
t/discovery/eureka.t .......................
Failed 4/19 subtests
```
### Environment
* apisix version (cmd: `apisix version`): master
* OS (cmd: `uname -a`): ubuntu 18.04
* OpenResty / Nginx version (cmd: `nginx -V` or `openresty -V`): source
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