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-rw-r--r--activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb b/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb
index ef176a1959..6cb97bc550 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb
@@ -116,7 +116,7 @@ module ActiveRecord
# #release_connection releases the connection-thread association
# and returns the connection to the pool.
def release_connection(with_id = current_connection_id)
- conn = @reserved_connections.delete(with_id)
+ conn = synchronize { @reserved_connections.delete(with_id) }
checkin conn if conn
end