Insert not finishing - Mailing list pgsql-general

Sometimes a script (I am running several of them in parallel on a server) just hangs.  That happened now again and when I checked I saw this:

SELECT pg_stat_get_backend_pid(s.backendid) AS procpid, pg_stat_get_backend_activity(s.backendid) AS current_query FROM (SELECT pg_stat_get_backend_idset() AS backendid) AS s;
 procpid |                                                                                                                    current_query                                                                                                                   
---------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
   31697 | SELECT  rkw_art_link.id, rkw_art_link.rart_id, rkw_art_link.kw_id FROM rkw_art_link WHERE ((rkw_art_link.kw_id = 'a9285811-8b14-421b-b7ee-2c0a7dc9c52c') AND (rkw_art_link.rart_id = '000182809000214')) ORDER BY rkw_art_link.id LIMIT 1 OFFSET 0;
   32234 | INSERT INTO rkeywords(de,uuid) VALUES ('ANGIOTENSIN RECEPTOR BLOCKER','4b1c8ae2-d837-4d25-a32f-4891db267b9b');
   30791 | INSERT INTO rkeywords(de,uuid) VALUES ('SYNCOPE','45044b9e-3cab-4f7b-83b9-f32cbed3cb24');
   31799 | <IDLE> in transaction
   16893 | <IDLE>
   31624 | INSERT INTO rkeywords(de,uuid) VALUES ('DIASTOLIC FUNCTION','0c3633b4-05d1-4871-bbc1-b5e4c797e0db');
   31884 | INSERT INTO rkeywords(de,uuid) VALUES ('MAPK','51b7d331-5652-4d05-9386-bc4e714b398d');
   31715 | <IDLE> in transaction
   31749 | <IDLE>
     321 | SELECT pg_stat_get_backend_pid(s.backendid) AS procpid, pg_stat_get_backend_activity(s.backendid) AS current_query FROM (SELECT pg_stat_get_backend_idset() AS backendid) AS s;
(10 rows)