From 5c17465a19c077e161b574c57225676c3be1a86d Mon Sep 17 00:00:00 2001
From: "Alexander A. Klimov" <alexander.klimov@icinga.com>
Date: Thu, 28 Mar 2024 14:02:49 +0100
Subject: [PATCH] OpenTsdbWriter#CheckResultHandler(): skip custom tags with
 empty values

refs #7724
---
 lib/perfdata/opentsdbwriter.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/lib/perfdata/opentsdbwriter.cpp b/lib/perfdata/opentsdbwriter.cpp
index 1a9e62781..461e1bfdd 100644
--- a/lib/perfdata/opentsdbwriter.cpp
+++ b/lib/perfdata/opentsdbwriter.cpp
@@ -212,6 +212,14 @@ void OpenTsdbWriter::CheckResultHandler(const Checkable::Ptr& checkable, const C
 					
 					continue;
 				}
+
+				if (value.IsEmpty()) {
+					Log(LogDebug, "OpenTsdbWriter")
+						<< "Resolved macro '" << pair.second
+						<< "' for checkable '" << checkable->GetName() << "' to '', skipping.";
+
+					continue;
+				}
 				
 				String tagname = Convert::ToString(pair.first);
 				tags[tagname] = EscapeTag(value);