From 8646bb1010d2632f5d405fe1761c2b9c99a0a139 Mon Sep 17 00:00:00 2001
From: Christian Schneider <chris@die-schneider.net>
Date: Tue, 8 Aug 2017 20:55:44 +0200
Subject: [PATCH] [AMQ-6788] Explain how to fix the problem in the exception

---
 .../src/main/java/org/apache/activemq/broker/BrokerService.java | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/activemq-broker/src/main/java/org/apache/activemq/broker/BrokerService.java b/activemq-broker/src/main/java/org/apache/activemq/broker/BrokerService.java
index c177b76454..f9cd50fe06 100644
--- a/activemq-broker/src/main/java/org/apache/activemq/broker/BrokerService.java
+++ b/activemq-broker/src/main/java/org/apache/activemq/broker/BrokerService.java
@@ -1787,6 +1787,8 @@ public class BrokerService implements Service {
                 this.tempDataStore = (PListStore) getClass().getClassLoader().loadClass(clazz).newInstance();
                 this.tempDataStore.setDirectory(getTmpDataDirectory());
                 configureService(tempDataStore);
+            } catch (ClassNotFoundException e) {
+                throw new RuntimeException("Kahadb class PListStoreImpl not found. Add activemq-kahadb jar or set persistent to false on BrokerService.", e);
             } catch (Exception e) {
                 throw new RuntimeException(e);
             }