linxinshuo opened a new issue #2680:
URL: https://github.com/apache/apisix/issues/2680
### Issue description
Current version, the config_etcd watch different prefixes and maintain
revisions separately, when some prefix be modified, the others can not perceive
revision change. If etcd enable auto compacted, the watcher with old revision
will be canceled because revision be compacted.
hope the watcher can handle the canceled result, re-pull the latest
revision and re-watch
In current version(2.0), canceled response will case panic
2020/11/10 10:23:25 [error] 46#0: *16354 [lua] config_etcd.lua:448: failed
to fetch data from etcd:
> /usr/local/apisix/apisix/core/etcd.lua:115: bad argument #1 to 'ipairs'
(table expected, got nil)
stack traceback:
[C]: in function 'ipairs'
/usr/local/apisix/apisix/core/etcd.lua:115: in function 'waitdir'
/usr/local/apisix/apisix/core/config_etcd.lua:255: in function
'sync_data'
/usr/local/apisix/apisix/core/config_etcd.lua:424: in function
</usr/local/apisix/apisix/core/config_etcd.lua:414>
[C]: in function 'xpcall'
/usr/local/apisix/apisix/core/config_etcd.lua:414: in function
</usr/local/apisix/apisix/core/config_etcd.lua:405>, etcd key:
/apisix/plugin_metadata, context: ngx.timer
### Environment
- apisix version (cmd: apisix version): 2.0
- OS:
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