Prevent concurrency issues when sending m3u8 file

1 files changed, 9 insertions, 2 deletions

diff --git a/server/lib/live/shared/muxing-session.ts b/server/lib/live/shared/muxing-session.ts
index 4c27d5dd8..64add2611 100644
--- a/server/lib/live/shared/muxing-session.ts
+++ b/server/lib/live/shared/muxing-session.ts
@@ -3,6 +3,7 @@ import { mapSeries } from 'bluebird'
 import { FSWatcher, watch } from 'chokidar'
 import { FfmpegCommand } from 'fluent-ffmpeg'
 import { appendFile, ensureDir, readFile, stat } from 'fs-extra'
+import PQueue from 'p-queue'
 import { basename, join } from 'path'
 import { EventEmitter } from 'stream'
 import { getLiveMuxingCommand, getLiveTranscodingCommand } from '@server/helpers/ffmpeg'
@@ -21,7 +22,6 @@ import { LiveSegmentShaStore } from '../live-segment-sha-store'
 import { buildConcatenatedName } from '../live-utils'
 
 import memoizee = require('memoizee')
-
 interface MuxingSessionEvents {
   'live-ready': (options: { videoId: number }) => void
 
@@ -278,11 +278,18 @@ class MuxingSession extends EventEmitter {
   private watchM3U8File () {
     this.m3u8Watcher = watch(this.outDirectory + '/*.m3u8')
 
+    const sendQueues = new Map<string, PQueue>()
+
     const onChangeOrAdd = async (m3u8Path: string) => {
       if (this.streamingPlaylist.storage !== VideoStorage.OBJECT_STORAGE) return
 
       try {
-        await storeHLSFileFromPath(this.streamingPlaylist, m3u8Path)
+        if (!sendQueues.has(m3u8Path)) {
+          sendQueues.set(m3u8Path, new PQueue({ concurrency: 1 }))
+        }
+
+        const queue = sendQueues.get(m3u8Path)
+        await queue.add(() => storeHLSFileFromPath(this.streamingPlaylist, m3u8Path))
       } catch (err) {
         logger.error('Cannot store in object storage m3u8 file %s', m3u8Path, { err, ...this.lTags() })
       }