From cabe5b5df2c1d31cd5fd3eeccbea32fa79cf404c Mon Sep 17 00:00:00 2001
From: Abyss777 <abyss@fox5.ru>
Date: Thu, 27 Jul 2017 14:57:22 +0500
Subject: Initialize some maps, because they might be accessed before
 initialized.

---
 src/org/traccar/database/DriversManager.java | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/org/traccar/database/DriversManager.java')

diff --git a/src/org/traccar/database/DriversManager.java b/src/org/traccar/database/DriversManager.java
index d3866a5f0..9defa1931 100644
--- a/src/org/traccar/database/DriversManager.java
+++ b/src/org/traccar/database/DriversManager.java
@@ -27,6 +27,9 @@ public class DriversManager extends ExtendedObjectManager<Driver> {
 
     public DriversManager(DataManager dataManager) {
         super(dataManager, Driver.class);
+        if (driversByUniqueId == null) {
+            driversByUniqueId = new ConcurrentHashMap<>();
+        }
     }
 
     private void putUniqueDriverId(Driver driver) {
-- 
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