From 706e6c56ff16087d6450b89a0b2179a4a43af197 Mon Sep 17 00:00:00 2001
From: Denis Flaven <denis.flaven@combodo.com>
Date: Fri, 19 Jun 2015 14:48:13 +0000
Subject: [PATCH] Mutex instrumentation for troubleshooting...

SVN:2.1.0[3596]
---
 core/mutex.class.inc.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/core/mutex.class.inc.php b/core/mutex.class.inc.php
index 8c7a7a9181..82e67dd609 100644
--- a/core/mutex.class.inc.php
+++ b/core/mutex.class.inc.php
@@ -131,7 +131,11 @@ class iTopMutex
 			$this->bLocked = true;
 			self::$aAcquiredLocks[$this->sName]++;
 		}
-		return ($res === '1');
+		if (($res !== '1') && ($res !== '0'))
+		{
+			IssueLog::Error('GET_LOCK('.$this->sName.', 0) returned: '.var_export($res, true).'. Expected values are: 0, 1 or null !!');
+		}
+		return ($res !== '0');
 	}
 
 	/**