From a5eef8b08ca4ea69cc3c5bb718102fe24f20a61b Mon Sep 17 00:00:00 2001
From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Tue, 15 Nov 2016 16:41:35 +0000
Subject: [Fix] Unlock ANN on error

---
 src/plugins/lua/fann_redis.lua | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/plugins/lua/fann_redis.lua b/src/plugins/lua/fann_redis.lua
index 3652f6724..cff8981de 100644
--- a/src/plugins/lua/fann_redis.lua
+++ b/src/plugins/lua/fann_redis.lua
@@ -400,6 +400,14 @@ local function train_fann(_, ev_base, elt)
     if err then
       rspamd_logger.errx(rspamd_config, 'cannot save ANN %s to redis: %s',
         fann_prefix .. elt, err)
+      redis_make_request(ev_base,
+        rspamd_config,
+        nil,
+        false, -- is write
+        redis_unlock_cb, --callback
+        'DEL', -- command
+        {fann_prefix .. elt .. '_lock'}
+      )
     end
   end
 
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