From acba5331a9a4b29397fc343cf62e7dd490a2875e Mon Sep 17 00:00:00 2001
From: James Callahan <james@konghq.com>
Date: Thu, 5 Jul 2018 16:04:28 +1000
Subject: [PATCH] kong/plugins/zipkin/opentracing.lua: Avoid :finish-ing a span
 twice

Closes #15
---
 kong/plugins/zipkin/opentracing.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kong/plugins/zipkin/opentracing.lua b/kong/plugins/zipkin/opentracing.lua
index 4f5d18ee154..32b05485d6e 100644
--- a/kong/plugins/zipkin/opentracing.lua
+++ b/kong/plugins/zipkin/opentracing.lua
@@ -185,7 +185,7 @@ function OpenTracingHandler:log(conf)
 		proxy_span:set_tag("peer.port", balancer_address.port)
 	end
 
-	if opentracing.header_filter_span then
+	if not opentracing.header_filter_finished and opentracing.header_filter_span then
 		opentracing.header_filter_span:finish(now)
 		opentracing.header_filter_finished = true
 	end