From 3d724030d4888d98eb1e71be420367806e27fd3e Mon Sep 17 00:00:00 2001
From: Alex Rudyy <orudyy@apache.org>
Date: Fri, 2 May 2014 11:45:54 +0000
Subject: QPID-5715: Restart replicated environment several times before giving
 up. This is due to a race condition on receiving DEATCHED event for a
 restarting environment causing EnvironmentFailureException

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1591875 13f79535-47bb-0310-9956-ffa450edef68
---
 .../replication/ReplicatedEnvironmentFacade.java   | 41 +++++++++++++++++-----
 .../berkeleydb/BDBHAVirtualHostNodeRestTest.java   |  2 +-
 2 files changed, 33 insertions(+), 10 deletions(-)

(limited to 'qpid/java')

diff --git a/qpid/java/bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/replication/ReplicatedEnvironmentFacade.java b/qpid/java/bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/replication/ReplicatedEnvironmentFacade.java
index a669904664..ab3d5e0cfa 100644
--- a/qpid/java/bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/replication/ReplicatedEnvironmentFacade.java
+++ b/qpid/java/bdbstore/src/main/java/org/apache/qpid/server/store/berkeleydb/replication/ReplicatedEnvironmentFacade.java
@@ -56,7 +56,6 @@ import com.sleepycat.je.Database;
 import com.sleepycat.je.DatabaseConfig;
 import com.sleepycat.je.DatabaseException;
 import com.sleepycat.je.Durability;
-import com.sleepycat.je.Environment;
 import com.sleepycat.je.EnvironmentConfig;
 import com.sleepycat.je.EnvironmentFailureException;
 import com.sleepycat.je.Transaction;
@@ -96,6 +95,7 @@ public class ReplicatedEnvironmentFacade implements EnvironmentFacade, StateChan
     private static final int MASTER_TRANSFER_TIMEOUT = Integer.getInteger(MASTER_TRANSFER_TIMEOUT_PROPERTY_NAME, DEFAULT_MASTER_TRANSFER_TIMEOUT);
     private static final int DB_PING_SOCKET_TIMEOUT = Integer.getInteger(DB_PING_SOCKET_TIMEOUT_PROPERTY_NAME, DEFAULT_DB_PING_SOCKET_TIMEOUT);
     private static final int REMOTE_NODE_MONITOR_INTERVAL = Integer.getInteger(REMOTE_NODE_MONITOR_INTERVAL_PROPERTY_NAME, DEFAULT_REMOTE_NODE_MONITOR_INTERVAL);
+    private static final int RESTART_TRY_LIMIT = 3;
 
     @SuppressWarnings("serial")
     private static final Map<String, String> REPCONFIG_DEFAULTS = Collections.unmodifiableMap(new HashMap<String, String>()
@@ -280,17 +280,26 @@ public class ReplicatedEnvironmentFacade implements EnvironmentFacade, StateChan
                 @Override
                 public void run()
                 {
-                    try
-                    {
-                        restartEnvironment();
-                    }
-                    catch (Exception e)
+                    for (int i = 0; i < RESTART_TRY_LIMIT; i++)
                     {
-                        LOGGER.error("Exception on environment restart", e);
+                        try
+                        {
+                            restartEnvironment();
+                            break;
+                        }
+                        catch(EnvironmentFailureException e)
+                        {
+                            // log exception and try again
+                            LOGGER.warn("Unexpected failure on environment restart. Restart iteration: " + i, e);
+                        }
+                        catch (Exception e)
+                        {
+                            LOGGER.error("Exception on environment restart", e);
+                            break;
+                        }
                     }
                 }
             });
-
         }
         else
         {
@@ -794,13 +803,24 @@ public class ReplicatedEnvironmentFacade implements EnvironmentFacade, StateChan
 
     private void closeEnvironmentOnRestart()
     {
-        Environment environment = _environment;
+        ReplicatedEnvironment environment = _environment;
         if (environment != null)
         {
             try
             {
                 if (environment.isValid())
                 {
+                    environment.setStateChangeListener(new StateChangeListener()
+                    {
+                        @Override
+                        public void stateChange(StateChangeEvent stateChangeEvent) throws RuntimeException
+                        {
+                            if (LOGGER.isInfoEnabled())
+                            {
+                                LOGGER.debug("When restarting a state change event is recieved on NOOP listener for state:" + stateChangeEvent.getState());
+                            }
+                        }
+                    });
                     try
                     {
                         closeDatabases();
@@ -823,7 +843,10 @@ public class ReplicatedEnvironmentFacade implements EnvironmentFacade, StateChan
                         }
                     }
                 }
+
+                LOGGER.debug("Closing environent");
                 environment.close();
+                LOGGER.debug("Environent is closed");
             }
             catch (EnvironmentFailureException efe)
             {
diff --git a/qpid/java/bdbstore/systests/src/main/java/org/apache/qpid/server/store/berkeleydb/BDBHAVirtualHostNodeRestTest.java b/qpid/java/bdbstore/systests/src/main/java/org/apache/qpid/server/store/berkeleydb/BDBHAVirtualHostNodeRestTest.java
index 27678241bd..b44cef8851 100644
--- a/qpid/java/bdbstore/systests/src/main/java/org/apache/qpid/server/store/berkeleydb/BDBHAVirtualHostNodeRestTest.java
+++ b/qpid/java/bdbstore/systests/src/main/java/org/apache/qpid/server/store/berkeleydb/BDBHAVirtualHostNodeRestTest.java
@@ -136,7 +136,7 @@ public class BDBHAVirtualHostNodeRestTest extends QpidRestTestCase
         if (isMaster)
         {
             assertEquals("Unexpected role", "MASTER", nodeData.get(BDBHAVirtualHostNode.ROLE));
-            Map<String, Object> hostData = getRestTestHelper().getJsonAsSingletonList("/rest/virtualhost/" + masterNode + "/" + _hostName);
+            Map<String, Object> hostData = getRestTestHelper().getJsonAsSingletonList("/rest/virtualhost/" + masterNode + "/" + _hostName + "?depth=0");
             assertEquals("Unexpected host name", _hostName, hostData.get(VirtualHost.NAME));
         }
         else
-- 
cgit v1.2.1