From c8f5443e0998d3d3d43505ff5a6fdf8c438d6c24 Mon Sep 17 00:00:00 2001
From: Micah Anderson <micah@riseup.net>
Date: Thu, 17 Apr 2014 15:43:11 -0400
Subject: fix for narrow timing issue that occurs when the check for a document
 existence fails, but then the document appears in the cluster before the
 script is able to put the document, causing a 409 Conflict (#5523)

---
 files/couch-doc-update | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/files/couch-doc-update b/files/couch-doc-update
index 242ed14..5ceed5e 100644
--- a/files/couch-doc-update
+++ b/files/couch-doc-update
@@ -90,6 +90,7 @@ end
   # update document
   #
 def set_document(db, id, data)
+  attempt ||= 1
   doc = get_document(db, id)
   if doc
     doc.id ||= id
@@ -97,6 +98,11 @@ def set_document(db, id, data)
   else
     create_document(db, id, data)
   end
+rescue RestClient::Conflict
+  # retry once, reraise if that does not work
+  raise if attempt > 1
+  attempt += 1
+  retry
 end
 
 def get_document(db, doc_id)
-- 
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