diff --git a/resources/sql/autopatches/20140822.daemonenvhash.sql b/resources/sql/autopatches/20140822.daemonenvhash.sql
new file mode 100644
--- /dev/null
+++ b/resources/sql/autopatches/20140822.daemonenvhash.sql
@@ -0,0 +1,2 @@
+ALTER TABLE {$NAMESPACE}_daemon.daemon_log
+  ADD COLUMN `envHash` CHAR(40) NOT NULL DEFAULT '' AFTER `dateModified`;
diff --git a/src/applications/config/check/PhabricatorSetupCheckDaemons.php b/src/applications/config/check/PhabricatorSetupCheckDaemons.php
--- a/src/applications/config/check/PhabricatorSetupCheckDaemons.php
+++ b/src/applications/config/check/PhabricatorSetupCheckDaemons.php
@@ -31,6 +31,7 @@
           'a',
           array(
             'href' => $doc_href,
+            'target' => '_blank'
           ),
           pht('Managing Daemons with phd')));
 
@@ -42,5 +43,44 @@
         ->addCommand('phabricator/ $ ./bin/phd start');
     }
 
+    $environment_hash = PhabricatorEnv::calculateEnvironmentHash();
+    $all_daemons = id(new PhabricatorDaemonLogQuery())
+      ->setViewer(PhabricatorUser::getOmnipotentUser())
+      ->withStatus(PhabricatorDaemonLogQuery::STATUS_ALIVE)
+      ->execute();
+    foreach ($all_daemons as $daemon) {
+      if ($daemon->getEnvHash() != $environment_hash) {
+        $doc_href = PhabricatorEnv::getDocLink(
+          'Managing Daemons with phd');
+
+        $summary = pht(
+          'You should restart the daemons. Their configuration is out of '.
+          'date.');
+
+        $message = pht(
+          'The Phabricator daemons are running with an out of date '.
+          'configuration. If you are making multiple configuration changes, '.
+          'you only need to restart the daemons once after the last change.'.
+          "\n\n".
+          'Use %s to restart daemons. See %s for more information.',
+          phutil_tag('tt', array(), 'bin/phd restart'),
+          phutil_tag(
+            'a',
+            array(
+              'href' => $doc_href,
+              'target' => '_blank'
+            ),
+            pht('Managing Daemons with phd')));
+
+        $this->newIssue('daemons.need-restarting')
+          ->setShortName(pht('Daemons Need Restarting'))
+          ->setName(pht('Phabricator Daemons Need Restarting'))
+          ->setSummary($summary)
+          ->setMessage($message)
+          ->addCommand('phabricator/ $ ./bin/phd restart');
+        break;
+      }
+    }
   }
+
 }
diff --git a/src/applications/daemon/event/PhabricatorDaemonEventListener.php b/src/applications/daemon/event/PhabricatorDaemonEventListener.php
--- a/src/applications/daemon/event/PhabricatorDaemonEventListener.php
+++ b/src/applications/daemon/event/PhabricatorDaemonEventListener.php
@@ -39,6 +39,7 @@
       ->setDaemon($event->getValue('daemonClass'))
       ->setHost(php_uname('n'))
       ->setPID(getmypid())
+      ->setEnvHash(PhabricatorEnv::calculateEnvironmentHash())
       ->setStatus(PhabricatorDaemonLog::STATUS_RUNNING)
       ->setArgv($event->getValue('argv'))
       ->setExplicitArgv($event->getValue('explicitArgv'))
diff --git a/src/applications/daemon/storage/PhabricatorDaemonLog.php b/src/applications/daemon/storage/PhabricatorDaemonLog.php
--- a/src/applications/daemon/storage/PhabricatorDaemonLog.php
+++ b/src/applications/daemon/storage/PhabricatorDaemonLog.php
@@ -15,6 +15,7 @@
   protected $pid;
   protected $argv;
   protected $explicitArgv = array();
+  protected $envHash;
   protected $status;
 
   public function getConfiguration() {
diff --git a/src/infrastructure/env/PhabricatorEnv.php b/src/infrastructure/env/PhabricatorEnv.php
--- a/src/infrastructure/env/PhabricatorEnv.php
+++ b/src/infrastructure/env/PhabricatorEnv.php
@@ -221,6 +221,15 @@
     return $env;
   }
 
+  public static function calculateEnvironmentHash() {
+    $keys = array_keys(self::getAllConfigKeys());
+    $values = array();
+    foreach ($keys as $key) {
+      $values[$key] = self::getEnvConfigIfExists($key);
+    }
+    return PhabricatorHash::digest(json_encode($values));
+  }
+
 
 /* -(  Reading Configuration  )---------------------------------------------- */