From 85ffbc535dabd93eaebcad55696647541e94637a Mon Sep 17 00:00:00 2001
From: Peter van Dijk <peter.van.dijk@netherlabs.nl>
Date: Tue, 22 Jan 2013 14:12:08 +0000
Subject: [PATCH] improve trace-regex and trace=fail behaviour

git-svn-id: svn://svn.powerdns.com/pdns/trunk/pdns@3072 d19b8d6e-7fed-0310-83ef-9ca221ded41b
---
 pdns/pdns_recursor.cc | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/pdns/pdns_recursor.cc b/pdns/pdns_recursor.cc
index 3c4b7b73f..dbc29aa68 100644
--- a/pdns/pdns_recursor.cc
+++ b/pdns/pdns_recursor.cc
@@ -550,20 +550,25 @@ void startDoResolve(void *p)
     
     uint32_t minTTL=std::numeric_limits<uint32_t>::max();
       
-    string trace(sr.getTrace());
-    if(!trace.empty()) {
-      vector<string> lines;
-      boost::split(lines, trace, boost::is_any_of("\n"));
-      BOOST_FOREACH(const string& line, lines) {
-        if(!line.empty())
-          L<<Logger::Warning<< line << endl;
-      }
-    }
     if(res < 0) {
       pw.getHeader()->rcode=RCode::ServFail;
       // no commit here, because no record
       g_stats.servFails++;
     }
+
+    if(tracedQuery || pw.getHeader()->rcode == RCode::ServFail)
+    {
+      // log trace, if we have one
+      string trace(sr.getTrace());
+      if(!trace.empty()) {
+        vector<string> lines;
+        boost::split(lines, trace, boost::is_any_of("\n"));
+        BOOST_FOREACH(const string& line, lines) {
+          if(!line.empty())
+            L<<Logger::Warning<< line << endl;
+        }
+      }
+    }
     else {
       pw.getHeader()->rcode=res;
       updateRcodeStats(res);
-- 
2.40.0