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fix race condition

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marin postma 2021-06-16 14:52:06 +02:00 committed by Tamo
parent 25af262e79
commit caa231aebe
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2 changed files with 25 additions and 5 deletions
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17
meilisearch-http/src/index_controller/mod.rs
View File

@ -6,6 +6,7 @@ use std::time::Duration;
use actix_web::web::{Bytes, Payload};
use chrono::{DateTime, Utc};
use futures::stream::StreamExt;
use log::error;
use log::info;
use milli::FieldsDistribution;
use serde::{Deserialize, Serialize};
@ -256,8 +257,20 @@ impl IndexController {
pub async fn delete_index(&self, uid: String) -> Result<()> {
let uuid = self.uuid_resolver.delete(uid).await?;
self.update_handle.delete(uuid).await?;
self.index_handle.delete(uuid).await?;
// We remove the index from the resolver synchronously, and effectively perform the index
// deletion as a background task.
let update_handle = self.update_handle.clone();
let index_handle = self.index_handle.clone();
tokio::spawn(async move {
if let Err(e) = update_handle.delete(uuid).await {
error!("Error while deleting index: {}", e);
}
if let Err(e) = index_handle.delete(uuid).await {
error!("Error while deleting index: {}", e);
}
});
Ok(())
}

13
meilisearch-http/src/index_controller/update_actor/store/mod.rs
View File

@ -428,7 +428,8 @@ impl UpdateStore {
Ok(None)
}
/// Delete all updates for an index from the update store.
/// Delete all updates for an index from the update store. If the currently processing update
/// is for `index_uuid`, the call will block until the update is terminated.
pub fn delete_all(&self, index_uuid: Uuid) -> Result<()> {
let mut txn = self.env.write_txn()?;
// Contains all the content file paths that we need to be removed if the deletion was successful.
@ -469,8 +470,14 @@ impl UpdateStore {
let _ = remove_file(path);
});
// We don't care about the currently processing update, since it will be removed by itself
// once its done processing, and we can't abort a running update.
// If the currently processing update is from our index, we wait until it is
// finished before returning. This ensure that no write to the index occurs after we delete it.
if let State::Processing(uuid, _) = *self.state.read() {
if uuid == index_uuid {
// wait for a write lock, do nothing with it.
self.state.write();
}
}
Ok(())
}