From 70272cf0e5c78909991f93974aa77577a72c0d11 Mon Sep 17 00:00:00 2001
From: Pieter Lexis <pieter.lexis@powerdns.com>
Date: Tue, 16 Aug 2016 15:51:47 +0200
Subject: [PATCH] pipe: SERVFAIL when needed:

 * SERVFAIL, but don't restart the coprocess if we get a FAIL.
 * SERVFAIL if the coprocess sends something we don't understand.
   * In this case, restart the coprocess.

Closes #4308

(cherry picked from commit 6e0daabf5d93bd240c4c3a5ba5afcb843686f3b8)
---
 modules/pipebackend/pipebackend.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/modules/pipebackend/pipebackend.cc b/modules/pipebackend/pipebackend.cc
index 987a9d74b9..98ec55297e 100644
--- a/modules/pipebackend/pipebackend.cc
+++ b/modules/pipebackend/pipebackend.cc
@@ -340,10 +340,14 @@ bool PipeBackend::get(DNSResourceRecord &r)
         throw PDNSException("Coprocess backend sent incorrect response '"+line+"'");
     }
   }
+  catch (DBException &dbe) {
+    L<<Logger::Error<<kBackendId<<" "<<dbe.reason<<endl;
+    throw;
+  }
   catch (PDNSException &pe) {
     L<<Logger::Error<<kBackendId<<" "<<pe.reason<<endl;
     cleanup();
-    return false;
+    throw;
   }
   return true;
 }
-- 
2.47.2