lock AccessShareLock on object 0/1260/0 is already held

Hello

What is state of this issue?
http://archives.postgresql.org/pgsql-hackers/2011-09/msg00423.php

We detect this issue in our servers - we use 9.1.6 on Linux

locktype | database | relation | page | tuple | virtualxid |
transactionid | classid | objid | objsubid | virtualtransaction | pid
| mode | granted
----------+----------+----------+------+-------+------------+---------------+---------+-------+----------+--------------------+-------+-----------------+---------
relation | 5630403 | 1259 | | | |
| | | | 20/0 | 14960 |
AccessShareLock | t

Interesting of this issue - it is blocks DBI login

Exception thrown: DBI
connect('database=xxx;host=yyy;port=5432','username',...) failed:
FATAL: lock AccessShareLock on object 5630403/1259/0 is already
held#012

but I am able to login to this database from command line without problems

There is unfriendly error message - I cannot get information about
statement that exactly raise this fatal state.

The most old message that I found is

Dec 10 15:01:51 cl-pdwh-d01 postgres[32548]: [6-1] (2012-12-10
15:01:51 CET db_hw7ny3roi257xe886fvc5krqgosp6g23)
Dec 10 15:01:51 cl-pdwh-d01 postgres[32548]: [6-2] ERROR: canceling
statement due to user request
Dec 10 15:01:51 cl-pdwh-d01 postgres[32738]: [6-1] (2012-12-10
15:01:51 CET db_hw7ny3roi257xe886fvc5krqgosp6g23)
Dec 10 15:01:51 cl-pdwh-d01 postgres[32738]: [6-2] FATAL: lock
AccessShareLock on object 5630403/1259/0 is already held
Dec 10 15:01:51 cl-pdwh-d01 postgres[32739]: [6-1] (2012-12-10
15:01:51 CET db_hw7ny3roi257xe886fvc5krqgosp6g23)
Dec 10 15:01:51 cl-pdwh-d01 postgres[32739]: [6-2] FATAL: lock
AccessShareLock on object 5630403/1259/0 is already held
Dec 10 15:02:29 cl-pdwh-d01 postgres[957]: [6-1] (2012-12-10 15:02:29
CET db_hw7ny3roi257xe886fvc5krqgosp6g23)
Dec 10 15:02:29 cl-pdwh-d01 postgres[957]: [6-2] FATAL: lock
AccessShareLock on object 5630403/1259/0 is already held

Regards

Pavel Stehule