ref(replays): remove chunking logic for large recordings (#2063)

After merging #2032, we can
confirm via our metrics that we no longer hit this logic, as we reject
payloads over 10 MiB and set our chunking limit to 15 MiB.



_#skip-changelog_

Co-authored-by: Tor <tor.saebjoernsen@sentry.io>

relay-server/src/actors/store.rs

@@ -664,10 +664,6 @@ impl StoreService {
         start_time: Instant,
         retention: u16,
     ) -> Result<(), StoreError> {
-        // Payloads must be chunked if they exceed a certain threshold. We do not chunk every
-        // message because we can achieve better parallelism when dealing with a single
-        // message.
-
         // 2000 bytes are reserved for the message metadata.
         let max_message_metadata_size = 2000;
 
@@ -697,90 +693,12 @@ impl StoreService {
                 event_type = "replay_recording_not_chunked"
             );
         } else {
-            // Produce chunks to the topic first. Ordering matters.
-            let replay_recording = self.produce_replay_recording_chunks(
-                event_id.ok_or(StoreError::NoEventId)?,
-                scoping.organization_id,
-                scoping.project_id,
-                item,
-            )?;
-
-            let message = KafkaMessage::ReplayRecording(ReplayRecordingKafkaMessage {
-                replay_id: event_id.ok_or(StoreError::NoEventId)?,
-                project_id: scoping.project_id,
-                key_id: scoping.key_id,
-                org_id: scoping.organization_id,
-                received: UnixTimestamp::from_instant(start_time).as_secs(),
-                retention_days: retention,
-                replay_recording,
-            });
-
-            self.produce(
-                KafkaTopic::ReplayRecordings,
-                scoping.organization_id,
-                message,
-            )?;
-
-            metric!(
-                counter(RelayCounters::ProcessingMessageProduced) += 1,
-                event_type = "replay_recording"
-            );
+            relay_log::warn!("replay_recording over maximum size.");
         };
 
         Ok(())
     }
 
-    fn produce_replay_recording_chunks(
-        &self,
-        replay_id: EventId,
-        organization_id: u64,
-        project_id: ProjectId,
-        item: &Item,
-    ) -> Result<ReplayRecordingChunkMeta, StoreError> {
-        let id = Uuid::new_v4().to_string();
-
-        let mut chunk_index = 0;
-        let mut offset = 0;
-        let payload = item.payload();
-        let size = item.len();
-
-        // This skips chunks for empty replay recordings. The consumer does not require chunks for
-        // empty replay recordings. `chunks` will be `0` in this case.
-        while offset < size {
-            // XXX: Max msesage size is 1MB.  We reserve 2000 bytes for metadata and the rest is
-            // consumed by the blob.
-            let max_chunk_size = 1000 * 1000 - 2000;
-            let chunk_size = std::cmp::min(max_chunk_size, size - offset);
-
-            let replay_recording_chunk_message =
-                KafkaMessage::ReplayRecordingChunk(ReplayRecordingChunkKafkaMessage {
-                    payload: payload.slice(offset..offset + chunk_size),
-                    replay_id,
-                    project_id,
-                    id: id.clone(),
-                    chunk_index,
-                });
-
-            self.produce(
-                KafkaTopic::ReplayRecordings,
-                organization_id,
-                replay_recording_chunk_message,
-            )?;
-
-            offset += chunk_size;
-            chunk_index += 1;
-        }
-
-        // The chunk_index is incremented after every loop iteration. After we exit the loop, it
-        // is one larger than the last chunk, so it is equal to the number of chunks.
-
-        Ok(ReplayRecordingChunkMeta {
-            id,
-            chunks: chunk_index,
-            size: Some(size),
-        })
-    }
-
     fn produce_check_in(
         &self,
         organization_id: u64,
@@ -1079,8 +997,6 @@ enum KafkaMessage {
     Profile(ProfileKafkaMessage),
     ReplayEvent(ReplayEventKafkaMessage),
     ReplayRecordingNotChunked(ReplayRecordingNotChunkedKafkaMessage),
-    ReplayRecording(ReplayRecordingKafkaMessage),
-    ReplayRecordingChunk(ReplayRecordingChunkKafkaMessage),
     CheckIn(CheckInKafkaMessage),
 }
 
@@ -1095,8 +1011,6 @@ impl Message for KafkaMessage {
             KafkaMessage::Metric(_) => "metric",
             KafkaMessage::Profile(_) => "profile",
             KafkaMessage::ReplayEvent(_) => "replay_event",
-            KafkaMessage::ReplayRecording(_) => "replay_recording",
-            KafkaMessage::ReplayRecordingChunk(_) => "replay_recording_chunk",
             KafkaMessage::ReplayRecordingNotChunked(_) => "replay_recording_not_chunked",
             KafkaMessage::CheckIn(_) => "check_in",
         }
@@ -1113,8 +1027,6 @@ impl Message for KafkaMessage {
             Self::Metric(_message) => Uuid::nil(),  // TODO(ja): Determine a partitioning key
             Self::Profile(_message) => Uuid::nil(),
             Self::ReplayEvent(message) => message.replay_id.0,
-            Self::ReplayRecording(message) => message.replay_id.0,
-            Self::ReplayRecordingChunk(message) => message.replay_id.0,
             Self::ReplayRecordingNotChunked(_message) => Uuid::nil(), // Ensure random partitioning.
             Self::CheckIn(_message) => Uuid::nil(),
         };