Fix System.InvalidOperationException : Collection was modified is thrown (#8826)

alrod · alrod · commit 7e486b0aa80e · 2022-10-11T13:36:31.000-07:00
diff --git a/src/WebJobs.Script.Grpc/Channel/GrpcWorkerChannel.cs b/src/WebJobs.Script.Grpc/Channel/GrpcWorkerChannel.cs
@@ -1190,7 +1190,10 @@ internal void EnsureTimerStarted()
         internal IEnumerable<TimeSpan> GetLatencies()
         {
             EnsureTimerStarted();
-            return _workerStatusLatencyHistory;
+            lock (_syncLock)
+            {
+                return _workerStatusLatencyHistory.ToArray();
+            }
         }
 
         internal async void OnTimer(object sender, System.Timers.ElapsedEventArgs e)

Original file line number	Diff line number	Diff line change
`@@ -1190,7 +1190,10 @@ internal void EnsureTimerStarted()`
`1190`	`1190`	`internal IEnumerable<TimeSpan> GetLatencies()`
`1191`	`1191`	`{`
`1192`	`1192`	`EnsureTimerStarted();`
`1193`		`- return _workerStatusLatencyHistory;`
	`1193`	`+ lock (_syncLock)`
	`1194`	`+ {`
	`1195`	`+ return _workerStatusLatencyHistory.ToArray();`
	`1196`	`+ }`
`1194`	`1197`	`}`
`1195`	`1198`
`1196`	`1199`	`internal async void OnTimer(object sender, System.Timers.ElapsedEventArgs e)`