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

alrod · alrod · commit f7d663c8758d · 2022-10-11T13:36:48.000-07:00
diff --git a/src/WebJobs.Script.Grpc/Channel/GrpcWorkerChannel.cs b/src/WebJobs.Script.Grpc/Channel/GrpcWorkerChannel.cs
@@ -993,7 +993,10 @@ 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
`@@ -993,7 +993,10 @@ internal void EnsureTimerStarted()`
`993`	`993`	`internal IEnumerable<TimeSpan> GetLatencies()`
`994`	`994`	`{`
`995`	`995`	`EnsureTimerStarted();`
`996`		`- return _workerStatusLatencyHistory;`
	`996`	`+ lock (_syncLock)`
	`997`	`+ {`
	`998`	`+ return _workerStatusLatencyHistory.ToArray();`
	`999`	`+ }`
`997`	`1000`	`}`
`998`	`1001`
`999`	`1002`	`internal async void OnTimer(object sender, System.Timers.ElapsedEventArgs e)`