Use multi-thread safe list implementation

1 files changed, 2 insertions, 1 deletions

diff --git a/jdisc_http_service/src/test/java/com/yahoo/jdisc/http/server/jetty/HttpServerTest.java b/jdisc_http_service/src/test/java/com/yahoo/jdisc/http/server/jetty/HttpServerTest.java
index 5df64c02990..6ace9699b42 100644
--- a/jdisc_http_service/src/test/java/com/yahoo/jdisc/http/server/jetty/HttpServerTest.java
+++ b/jdisc_http_service/src/test/java/com/yahoo/jdisc/http/server/jetty/HttpServerTest.java
@@ -65,6 +65,7 @@ import java.util.Comparator;
 import java.util.List;
 import java.util.Map;
 import java.util.TreeMap;
+import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
@@ -188,7 +189,7 @@ public class HttpServerTest {
 
     private static class AccessLogMock extends AccessLog {
 
-        final List<AccessLogEntry> logEntries = new ArrayList<>();
+        final List<AccessLogEntry> logEntries = new CopyOnWriteArrayList<>();
 
         AccessLogMock() { super(null); }