3 files changed, 26 insertions, 3 deletions
diff --git a/src/org/traccar/database/DataManager.java b/src/org/traccar/database/DataManager.java
index a32d31d68..f5df1b84b 100644
--- a/src/org/traccar/database/DataManager.java
+++ b/src/org/traccar/database/DataManager.java
@@ -342,11 +342,34 @@ public class DataManager implements IdentityManager {
                 .executeQuery(GroupPermission.class);
     }
 
-    public Collection<Device> getAllDevices() throws SQLException {
+    private Collection<Device> getAllDevices() throws SQLException {
         return QueryBuilder.create(dataSource, getQuery("database.selectDevicesAll"))
                 .executeQuery(Device.class);
     }
 
+    public Collection<Device> getAllDevicesCached() {
+        boolean forceUpdate;
+        devicesLock.readLock().lock();
+        try {
+            forceUpdate = devicesById.values().isEmpty();
+        } finally {
+            devicesLock.readLock().unlock();
+        }
+
+        try {
+            updateDeviceCache(forceUpdate);
+        } catch (SQLException e) {
+            Log.warning(e);
+        }
+
+        devicesLock.readLock().lock();
+        try {
+            return devicesById.values();
+        } finally {
+            devicesLock.readLock().unlock();
+        }
+    }
+
     public Collection<Device> getDevices(long userId) throws SQLException {
         Collection<Device> devices = new ArrayList<>();
         for (long id : Context.getPermissionsManager().getDevicePermissions(userId)) {
diff --git a/src/org/traccar/database/GeofenceManager.java b/src/org/traccar/database/GeofenceManager.java
index b551bc467..0119a62ca 100644
--- a/src/org/traccar/database/GeofenceManager.java
+++ b/src/org/traccar/database/GeofenceManager.java
@@ -113,7 +113,7 @@ public class GeofenceManager {
                             .add(deviceGeofence.getGeofenceId());
                     }
 
-                    for (Device device : dataManager.getAllDevices()) {
+                    for (Device device : dataManager.getAllDevicesCached()) {
                         long groupId = device.getGroupId();
                         while (groupId != 0) {
                             getDeviceGeofences(deviceGeofencesWithGroups,
diff --git a/src/org/traccar/database/PermissionsManager.java b/src/org/traccar/database/PermissionsManager.java
index 96a6488ef..b6dd2e2a9 100644
--- a/src/org/traccar/database/PermissionsManager.java
+++ b/src/org/traccar/database/PermissionsManager.java
@@ -78,7 +78,7 @@ public class PermissionsManager {
                 users.put(user.getId(), user);
             }
 
-            GroupTree groupTree = new GroupTree(dataManager.getAllGroups(), dataManager.getAllDevices());
+            GroupTree groupTree = new GroupTree(dataManager.getAllGroups(), dataManager.getAllDevicesCached());
             for (GroupPermission permission : dataManager.getGroupPermissions()) {
                 Set<Long> userGroupPermissions = getGroupPermissions(permission.getUserId());
                 Set<Long> userDevicePermissions = getDevicePermissions(permission.getUserId());