Make sure the indexing lock is released,

even when an error occurs.

Signed-off-by: Roberto Rosario <roberto.rosario.gonzalez@gmail.com>

mayan/apps/document_indexing/models.py

@@ -191,8 +191,11 @@ class IndexTemplateNode(MPTTModel):
 
         # Start transaction after the lock in case the locking backend uses
         # the database.
+        try:
             with transaction.atomic():
-            logger.debug('IndexTemplateNode; Indexing document: %s', document)
+                logger.debug(
+                    'IndexTemplateNode; Indexing document: %s', document
+                )
 
                 logger.debug(
                     'Removing document "%s" from all index instance nodes',
@@ -215,10 +218,6 @@ class IndexTemplateNode(MPTTModel):
                             document=document, acquire_lock=False,
                             index_instance_node_parent=index_instance_node
                         )
-
-                if acquire_lock:
-                    lock.release()
-
                 elif self.enabled:
                     logger.debug('IndexTemplateNode; non parent: evaluating')
                     logger.debug('My parent template is: %s', self.parent)
@@ -247,6 +246,7 @@ class IndexTemplateNode(MPTTModel):
                         logger.debug(error_message)
                     else:
                         logger.debug('Evaluation result: %s', result)
+
                         if result:
                             index_instance_node, created = self.index_instance_nodes.get_or_create(
                                 parent=index_instance_node_parent,