mirror of https://github.com/go-gitea/gitea.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
6f9c278559
# ⚠️ Breaking Many deprecated queue config options are removed (actually, they should have been removed in 1.18/1.19). If you see the fatal message when starting Gitea: "Please update your app.ini to remove deprecated config options", please follow the error messages to remove these options from your app.ini. Example: ``` 2023/05/06 19:39:22 [E] Removed queue option: `[indexer].ISSUE_INDEXER_QUEUE_TYPE`. Use new options in `[queue.issue_indexer]` 2023/05/06 19:39:22 [E] Removed queue option: `[indexer].UPDATE_BUFFER_LEN`. Use new options in `[queue.issue_indexer]` 2023/05/06 19:39:22 [F] Please update your app.ini to remove deprecated config options ``` Many options in `[queue]` are are dropped, including: `WRAP_IF_NECESSARY`, `MAX_ATTEMPTS`, `TIMEOUT`, `WORKERS`, `BLOCK_TIMEOUT`, `BOOST_TIMEOUT`, `BOOST_WORKERS`, they can be removed from app.ini. # The problem The old queue package has some legacy problems: * complexity: I doubt few people could tell how it works. * maintainability: Too many channels and mutex/cond are mixed together, too many different structs/interfaces depends each other. * stability: due to the complexity & maintainability, sometimes there are strange bugs and difficult to debug, and some code doesn't have test (indeed some code is difficult to test because a lot of things are mixed together). * general applicability: although it is called "queue", its behavior is not a well-known queue. * scalability: it doesn't seem easy to make it work with a cluster without breaking its behaviors. It came from some very old code to "avoid breaking", however, its technical debt is too heavy now. It's a good time to introduce a better "queue" package. # The new queue package It keeps using old config and concept as much as possible. * It only contains two major kinds of concepts: * The "base queue": channel, levelqueue, redis * They have the same abstraction, the same interface, and they are tested by the same testing code. * The "WokerPoolQueue", it uses the "base queue" to provide "worker pool" function, calls the "handler" to process the data in the base queue. * The new code doesn't do "PushBack" * Think about a queue with many workers, the "PushBack" can't guarantee the order for re-queued unhandled items, so in new code it just does "normal push" * The new code doesn't do "pause/resume" * The "pause/resume" was designed to handle some handler's failure: eg: document indexer (elasticsearch) is down * If a queue is paused for long time, either the producers blocks or the new items are dropped. * The new code doesn't do such "pause/resume" trick, it's not a common queue's behavior and it doesn't help much. * If there are unhandled items, the "push" function just blocks for a few seconds and then re-queue them and retry. * The new code doesn't do "worker booster" * Gitea's queue's handlers are light functions, the cost is only the go-routine, so it doesn't make sense to "boost" them. * The new code only use "max worker number" to limit the concurrent workers. * The new "Push" never blocks forever * Instead of creating more and more blocking goroutines, return an error is more friendly to the server and to the end user. There are more details in code comments: eg: the "Flush" problem, the strange "code.index" hanging problem, the "immediate" queue problem. Almost ready for review. TODO: * [x] add some necessary comments during review * [x] add some more tests if necessary * [x] update documents and config options * [x] test max worker / active worker * [x] re-run the CI tasks to see whether any test is flaky * [x] improve the `handleOldLengthConfiguration` to provide more friendly messages * [x] fine tune default config values (eg: length?) ## Code coverage:  |
2 years ago | |
|---|---|---|
| .. | ||
| actions | 2 years ago | |
| activitypub | 2 years ago | |
| analyze | 2 years ago | |
| assetfs | 2 years ago | |
| auth | 2 years ago | |
| avatar | 2 years ago | |
| base | 2 years ago | |
| cache | 2 years ago | |
| charset | 2 years ago | |
| container | 2 years ago | |
| context | 2 years ago | |
| csv | 2 years ago | |
| doctor | 2 years ago | |
| emoji | 2 years ago | |
| eventsource | 2 years ago | |
| generate | 2 years ago | |
| git | 2 years ago | |
| gitgraph | 2 years ago | |
| graceful | 2 years ago | |
| hcaptcha | 2 years ago | |
| highlight | 2 years ago | |
| hostmatcher | 2 years ago | |
| html | 2 years ago | |
| httpcache | 2 years ago | |
| httplib | 2 years ago | |
| indexer | 2 years ago | |
| issue/template | 2 years ago | |
| json | 2 years ago | |
| label | 2 years ago | |
| lfs | 2 years ago | |
| log | 2 years ago | |
| markup | 2 years ago | |
| mcaptcha | 2 years ago | |
| metrics | 2 years ago | |
| migration | 2 years ago | |
| mirror | 2 years ago | |
| nosql | 2 years ago | |
| notification | 2 years ago | |
| options | 2 years ago | |
| packages | 2 years ago | |
| paginator | 2 years ago | |
| pprof | 2 years ago | |
| private | 2 years ago | |
| process | 2 years ago | |
| proxy | 2 years ago | |
| proxyprotocol | 2 years ago | |
| public | 2 years ago | |
| queue | 2 years ago | |
| recaptcha | 2 years ago | |
| references | 2 years ago | |
| regexplru | 2 years ago | |
| repository | 2 years ago | |
| secret | 2 years ago | |
| session | 2 years ago | |
| setting | 2 years ago | |
| sitemap | 2 years ago | |
| ssh | 2 years ago | |
| storage | 2 years ago | |
| structs | 2 years ago | |
| svg | 2 years ago | |
| sync | 2 years ago | |
| system | 2 years ago | |
| templates | 2 years ago | |
| test | 2 years ago | |
| testlogger | 2 years ago | |
| timeutil | 2 years ago | |
| translation | 2 years ago | |
| turnstile | 2 years ago | |
| typesniffer | 2 years ago | |
| updatechecker | 2 years ago | |
| upload | 2 years ago | |
| uri | 2 years ago | |
| user | 2 years ago | |
| util | 2 years ago | |
| validation | 2 years ago | |
| web | 2 years ago | |
| webhook | 2 years ago | |
