Add tracing to index-scheduler

Cargo.lock

@@ -2917,6 +2917,7 @@ dependencies = [
  "tempfile",
  "thiserror",
  "time",
+ "tracing",
  "ureq",
  "uuid",
 ]

index-scheduler/Cargo.toml

@@ -30,7 +30,13 @@ serde_json = { version = "1.0.111", features = ["preserve_order"] }
 synchronoise = "1.0.1"
 tempfile = "3.9.0"
 thiserror = "1.0.56"
-time = { version = "0.3.31", features = ["serde-well-known", "formatting", "parsing", "macros"] }
+time = { version = "0.3.31", features = [
+    "serde-well-known",
+    "formatting",
+    "parsing",
+    "macros",
+] }
+tracing = "0.1.40"
 ureq = "2.9.1"
 uuid = { version = "1.6.1", features = ["serde", "v4"] }
 
@@ -39,4 +45,4 @@ big_s = "1.0.2"
 crossbeam = "0.8.4"
 insta = { version = "1.34.0", features = ["json", "redactions"] }
 meili-snap = { path = "../meili-snap" }
-nelson = { git = "https://github.com/meilisearch/nelson.git", rev = "675f13885548fb415ead8fbb447e9e6d9314000a"}
+nelson = { git = "https://github.com/meilisearch/nelson.git", rev = "675f13885548fb415ead8fbb447e9e6d9314000a" }

index-scheduler/src/batch.rs

@@ -24,7 +24,6 @@ use std::fs::{self, File};
 use std::io::BufWriter;
 
 use dump::IndexMetadata;
-use log::{debug, error, info, trace};
 use meilisearch_types::error::Code;
 use meilisearch_types::heed::{RoTxn, RwTxn};
 use meilisearch_types::milli::documents::{obkv_to_object, DocumentsBatchReader};
@@ -514,6 +513,7 @@ impl IndexScheduler {
     /// 3. We get the *next* snapshot to process.
     /// 4. We get the *next* dump to process.
     /// 5. We get the *next* tasks to process for a specific index.
+    #[tracing::instrument(level = "trace", skip(self, rtxn), target = "indexing::scheduler")]
     pub(crate) fn create_next_batch(&self, rtxn: &RoTxn) -> Result<Option<Batch>> {
         #[cfg(test)]
         self.maybe_fail(crate::tests::FailureLocation::InsideCreateBatch)?;
@@ -619,6 +619,7 @@ impl IndexScheduler {
     /// The list of tasks that were processed. The metadata of each task in the returned
     /// list is updated accordingly, with the exception of the its date fields
     /// [`finished_at`](meilisearch_types::tasks::Task::finished_at) and [`started_at`](meilisearch_types::tasks::Task::started_at).
+    #[tracing::instrument(level = "trace", skip(self, batch), target = "indexing::scheduler", fields(batch=batch.to_string()))]
     pub(crate) fn process_batch(&self, batch: Batch) -> Result<Vec<Task>> {
         #[cfg(test)]
         {
@@ -668,9 +669,10 @@ impl IndexScheduler {
                     Ok(()) => {
                         for content_uuid in canceled_tasks_content_uuids {
                             if let Err(error) = self.delete_update_file(content_uuid) {
-                                error!(
+                                tracing::error!(
-                                    "We failed deleting the content file indentified as {}: {}",
+                                    file_content_uuid = %content_uuid,
-                                    content_uuid, error
+                                    %error,
+                                    "Failed deleting content file"
                                 )
                             }
                         }
@@ -969,7 +971,10 @@ impl IndexScheduler {
 
                 match res {
                     Ok(_) => (),
-                    Err(e) => error!("Could not write the stats of the index {}", e),
+                    Err(e) => tracing::error!(
+                        error = &e as &dyn std::error::Error,
+                        "Could not write the stats of the index"
+                    ),
                 }
 
                 Ok(tasks)
@@ -997,7 +1002,7 @@ impl IndexScheduler {
                     builder.set_primary_key(primary_key);
                     let must_stop_processing = self.must_stop_processing.clone();
                     builder.execute(
-                        |indexing_step| debug!("update: {:?}", indexing_step),
+                        |indexing_step| tracing::debug!(update = ?indexing_step),
                         || must_stop_processing.get(),
                     )?;
                     index_wtxn.commit()?;
@@ -1024,7 +1029,10 @@ impl IndexScheduler {
 
                 match res {
                     Ok(_) => (),
-                    Err(e) => error!("Could not write the stats of the index {}", e),
+                    Err(e) => tracing::error!(
+                        error = &e as &dyn std::error::Error,
+                        "Could not write the stats of the index"
+                    ),
                 }
 
                 Ok(vec![task])
@@ -1143,6 +1151,11 @@ impl IndexScheduler {
     ///
     /// ## Return
     /// The list of processed tasks.
+    #[tracing::instrument(
+        level = "trace",
+        skip(self, index_wtxn, index),
+        target = "indexing::scheduler"
+    )]
     fn apply_index_operation<'i>(
         &self,
         index_wtxn: &mut RwTxn<'i>,
@@ -1203,7 +1216,7 @@ impl IndexScheduler {
                                 milli::update::Settings::new(index_wtxn, index, indexer_config);
                             builder.set_primary_key(primary_key);
                             builder.execute(
-                                |indexing_step| debug!("update: {:?}", indexing_step),
+                                |indexing_step| tracing::debug!(update = ?indexing_step),
                                 || must_stop_processing.clone().get(),
                             )?;
                             primary_key_has_been_set = true;
@@ -1222,7 +1235,7 @@ impl IndexScheduler {
                     index,
                     indexer_config,
                     config,
-                    |indexing_step| trace!("update: {:?}", indexing_step),
+                    |indexing_step| tracing::trace!(?indexing_step, "Update"),
                     || must_stop_processing.get(),
                 )?;
 
@@ -1294,7 +1307,7 @@ impl IndexScheduler {
 
                 if !tasks.iter().all(|res| res.error.is_some()) {
                     let addition = builder.execute()?;
-                    info!("document addition done: {:?}", addition);
+                    tracing::info!(indexing_result = ?addition, "document indexing done");
                 } else if primary_key_has_been_set {
                     // Everything failed but we've set a primary key.
                     // We need to remove it.
@@ -1302,7 +1315,7 @@ impl IndexScheduler {
                         milli::update::Settings::new(index_wtxn, index, indexer_config);
                     builder.reset_primary_key();
                     builder.execute(
-                        |indexing_step| trace!("update: {:?}", indexing_step),
+                        |indexing_step| tracing::trace!(update = ?indexing_step),
                         || must_stop_processing.clone().get(),
                     )?;
                 }
@@ -1372,7 +1385,7 @@ impl IndexScheduler {
 
                 let must_stop_processing = self.must_stop_processing.clone();
                 builder.execute(
-                    |indexing_step| debug!("update: {:?}", indexing_step),
+                    |indexing_step| tracing::debug!(update = ?indexing_step),
                     || must_stop_processing.get(),
                 )?;
 
@@ -1584,7 +1597,7 @@ fn delete_document_by_filter<'a>(
             index,
             indexer_config,
             config,
-            |indexing_step| debug!("update: {:?}", indexing_step),
+            |indexing_step| tracing::debug!(update = ?indexing_step),
             || must_stop_processing.get(),
         )?;
 

index-scheduler/src/lib.rs

@@ -1193,7 +1193,7 @@ impl IndexScheduler {
                         log::error!("Failure to delete the content files associated with task {}. Error: {e}", task.uid);
                     }
                 }
-                log::info!("A batch of tasks was successfully completed.");
+                tracing::info!("A batch of tasks was successfully completed.");
             }
             // If we have an abortion error we must stop the tick here and re-schedule tasks.
             Err(Error::Milli(milli::Error::InternalError(