spacewander commented on issue #4941:
URL: https://github.com/apache/apisix/issues/4941#issuecomment-908967424
I try to reproduce it but fail. Here is my route configuration:
```
routes:
-
uri: /hello*
upstream:
nodes:
ttl.1s.test.local:1980: 1
type: roundrobin
#END
```
I used coredns and a python script to change DNS configuration each second,
and the IP rotates from 127.0.0.1 to 127.0.0.8:
```
#!/usr/bin/env python3
# coding: utf-8
import time
ip = 0
serial = 2017042745
while True:
ip = (ip % 8) + 1
tpl = """$ORIGIN test.local.
@ 3600 IN SOA sns.dns.icann.org. noc.dns.icann.org. (
%d ; serial
7200 ; refresh (2 hours)
3600 ; retry (1 hour)
1209600 ; expire (2 weeks)
3600 ; minimum (1 hour)
)
3600 IN NS a.iana-servers.net.
3600 IN NS b.iana-servers.net.
ttl.1s 1 IN A 127.0.0.%d
""" % (serial, ip)
serial += 1
ip += 1
with open("./db.test.local", "w") as f:
f.write(tpl)
time.sleep(1)
```
```
test.local {
file db.test.local {
reload 1s
}
log
}
```
Then I loaded test the `/hello` for minutes but nothing found.
I am curious about why the input can bypass the loop check:
https://github.com/apache/apisix/blob/a062a9c83bad20672babd0b0b64484220dcac16c/apisix/core/table.lua#L102-L103
Maybe it only happens with special route configuration? What's your route
configuration?
And you may need to add more log inside `_deepcopy`.
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