nic-6443 opened a new pull request, #12514: URL: https://github.com/apache/apisix/pull/12514
### Description When multiple APISIX clusters connect to the same etcd cluster, each APISIX cluster uses a different `etcd.prefix` to distinguish configurations. In this case, it is possible that the configuration of Cluster A changes frequently while the configuration of Cluster B remains unchanged. Since etcd revision is globally shared, this will cause the etcd client of Cluster B to always use an old revision when requesting the `/watch` API. When revisions continue updating for a certain period and trigger etcd's compact mechanism, it will result in a watch API error: `compact error`, which in turn causes APISIX in Cluster B to need to resynchronize data fully. This operation consumes a lot of computational resources from both the gateway and etcd. In this PR, after a timeout occurs while watch request, we initiate the watch request again with the latest revision to avoid the above issue. #### Which issue(s) this PR fixes: <!-- *Automatically closes linked issue when PR is merged. Usage: `Fixes #<issue number>`, or `Fixes (paste link of issue)`. --> Fixes # ### Checklist - [ ] I have explained the need for this PR and the problem it solves - [ ] I have explained the changes or the new features added to this PR - [ ] I have added tests corresponding to this change - [ ] I have updated the documentation to reflect this change - [ ] I have verified that this change is backward compatible (If not, please discuss on the [APISIX mailing list](https://github.com/apache/apisix/tree/master#community) first) <!-- Note 1. Mark the PR as draft until it's ready to be reviewed. 2. Always add/update tests for any changes unless you have a good reason. 3. Always update the documentation to reflect the changes made in the PR. 4. Make a new commit to resolve conversations instead of `push -f`. 5. To resolve merge conflicts, merge master instead of rebasing. 6. Use "request review" to notify the reviewer after making changes. 7. Only a reviewer can mark a conversation as resolved. --> -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: notifications-unsubscr...@apisix.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
