mirror of
https://github.com/girlbossceo/conduwuit.git
synced 2024-12-02 10:18:40 +00:00
62 lines
4.3 KiB
Markdown
62 lines
4.3 KiB
Markdown
# Troubleshooting conduwuit
|
|
|
|
> ## Docker users ⚠️
|
|
>
|
|
> Docker is extremely UX unfriendly. Because of this, a ton of issues or support is actually Docker support, not conduwuit support. We also cannot document the ever-growing list of Docker issues here.
|
|
>
|
|
> If you intend on asking for support and you are using Docker, **PLEASE** triple validate your issues are **NOT** because you have a misconfiguration in your Docker setup.
|
|
>
|
|
> If there are things like Compose file issues or Dockerhub image issues, those can still be mentioned as long as they're something we can fix.
|
|
|
|
## Rocksdb / database issues
|
|
|
|
#### Direct IO
|
|
|
|
Some filesystems may not like RocksDB using [Direct IO](https://github.com/facebook/rocksdb/wiki/Direct-IO). Direct IO is for non-buffered I/O which improves conduwuit performance, but at least FUSE is a filesystem potentially known to not like this. See the [example config](configuration/examples.md) for disabling it if needed. Issues from Direct IO on unsupported filesystems are usually shown as startup errors.
|
|
|
|
#### Database corruption
|
|
|
|
If your database is corrupted *and* is failing to start (e.g. checksum mismatch), it may be recoverable but careful steps must be taken, and there is no guarantee it may be recoverable.
|
|
|
|
The first thing that can be done is launching conduwuit with the `rocksdb_repair` config option set to true. This will tell RocksDB to attempt to repair itself at launch. If this does not work, disable the option and continue reading.
|
|
|
|
RocksDB has the following recovery modes:
|
|
|
|
- `TolerateCorruptedTailRecords`
|
|
- `AbsoluteConsistency`
|
|
- `PointInTime`
|
|
- `SkipAnyCorruptedRecord`
|
|
|
|
By default, conduwuit uses `TolerateCorruptedTailRecords` as generally these may be due to bad federation and we can re-fetch the correct data over federation. The RocksDB default is `PointInTime` which will attempt to restore a "snapshot" of the data when it was last known to be good. This data can be either a few seconds old, or multiple minutes prior. `PointInTime` may not be suitable for default usage due to clients and servers possibly not being able to handle sudden "backwards time travels", and `AbsoluteConsistency` may be too strict.
|
|
|
|
`AbsoluteConsistency` will fail to start the database if any sign of corruption is detected. `SkipAnyCorruptedRecord` will skip all forms of corruption unless it forbids the database from opening (e.g. too severe). Usage of `SkipAnyCorruptedRecord` voids any support as this may cause more damage and/or leave your database in a permanently inconsistent state, but it may do something if `PointInTime` does not work as a last ditch effort.
|
|
|
|
With this in mind:
|
|
|
|
- First start conduwuit with the `PointInTime` recovery method. See the [example config](configuration/examples.md) for how to do this using `rocksdb_recovery_mode`
|
|
- If your database successfully opens, clients are recommended to clear their client cache to account for the rollback
|
|
- Leave your conduwuit running in `PointInTime` for at least 30-60 minutes so as much possible corruption is restored
|
|
- If all goes will, you should be able to restore back to using `TolerateCorruptedTailRecords` and you have successfully recovered your database
|
|
|
|
## Media
|
|
|
|
## Debugging
|
|
|
|
Note that users should not really be debugging things. If you find yourself debugging and find the issue, please let us know and/or how we can fix it. Various debug commands can be found in `!admin debug`.
|
|
|
|
#### Debug/Trace log level
|
|
|
|
conduwuit builds without debug or trace log levels by default for at least performance reasons. This may change in the future and/or binaries providing such configurations may be provided. If you need to access debug/trace log levels, you will need to build without the `release_max_log_level` feature.
|
|
|
|
#### Changing log level dynamically
|
|
|
|
conduwuit supports changing the tracing log environment filter on-the-fly using the admin command `!admin debug change-log-level`. This accepts a string **without quotes** the same format as the `log` config option.
|
|
|
|
#### Pinging servers
|
|
|
|
conduwuit can ping other servers using `!admin debug ping`. This takes a server name and goes through the server discovery process and queries `/_matrix/federation/v1/version`. Errors are outputted.
|
|
|
|
#### Allocator memory stats
|
|
|
|
When using jemalloc with jemallocator's `stats` feature, you can see conduwuit's jemalloc memory stats by using `!admin debug memory-stats`
|