If you are using shared db you should be disabling the features for managing the schema.  The issue is you will need to manually maintain your schema.  Almost always we manage schema it a way that is backwards compatible so you can do staged upgrades if you manually add to the tables.

On May 10, 2019, at 5:45 AM, Praveen Chourasia <praveen.chourasia@outlook.com> wrote:

Hi Frédérick,

PostgreSQL BDR uses 'Master-Master' replication and requires locking if any of the PostgreSQL BDR nodes (that are in replication cluster)  executes DDL SQL queries. It causes the whole cluster to lock as far as I remember.

The reason you may be experiencing the database getting locked when you restart one of the FreeSWITCH nodes is that FreeSWITCH upon its start/restart executes DDL queries. 

FreeSWITCH AFAIK unconditionally executes 'DROP TABLE/VIEW...' and 'CREATE TABLE/VIEW ...' for tables like 'channels', 'calls', 'interfaces', 'tasks' (TABLES) & 'detailed_calls', 'basic_calls' (VIEWS) that ultimately leads to PostgreSQL BDR getting locked.

--
Praveen Chourasia

From: FreeSWITCH-users <freeswitch-users-bounces@lists.freeswitch.org> on behalf of Frédérick Pruneau <frederick@targointernet.com>
Sent: Monday, May 6, 2019 7:38 PM
To: freeswitch-users@lists.freeswitch.org
Subject: [Freeswitch-users] FS can't reconnect to PostgreSQL database
 
Hi guys,

I have an issue with FS unable to reconnect to postgresql database. Here 
is the setup: 2 FreeSWITCH servers with 2 postgresql servers. Each 
freeswitch is connected to 1 postgresql server. DB servers are synced 
with BDR. It was working very well until I restarted freeswitch service 
on one of the servers. Then, I got theses errors showing up on 
freeswitch console:

switch_pgsql.c:384 Query X took too long to complete or database not 
responding.

database is locked against ddl by another node

I followed some guides to remove locks with these commands:

SELECT * FROM pg_stat_activity;
SELECT pg_terminate_backend(${pid});

But the issue is still there. Do you have an idea how to fix this issue?

Thanks.