Make field final

1 files changed, 1 insertions, 1 deletions

diff --git a/vespajlib/src/main/java/com/yahoo/concurrent/maintenance/Maintainer.java b/vespajlib/src/main/java/com/yahoo/concurrent/maintenance/Maintainer.java
index 2690edc9407..9fb5172ab0a 100644
--- a/vespajlib/src/main/java/com/yahoo/concurrent/maintenance/Maintainer.java
+++ b/vespajlib/src/main/java/com/yahoo/concurrent/maintenance/Maintainer.java
@@ -31,7 +31,7 @@ public abstract class Maintainer implements Runnable {
     private final JobMetrics jobMetrics;
     private final Duration interval;
     private final ScheduledExecutorService service;
-    private AtomicBoolean shutDown = new AtomicBoolean();
+    private final AtomicBoolean shutDown = new AtomicBoolean();
 
     public Maintainer(String name, Duration interval, Instant startedAt, JobControl jobControl, JobMetrics jobMetrics, List<String> clusterHostnames) {
         this(name, interval, staggeredDelay(interval, startedAt, HostName.getLocalhost(), clusterHostnames), jobControl, jobMetrics);