Postgresql Transaction ID Not Found - postgresql

Question

Whenever I am executing a query in postgresql, this is the error message I receive
Transaction ID not found in the session.
Does anyone have any idea how to resolve this? I recently created a new user, but I was unable to find documentation that even shows this as a valid error.
Additional Details:
I've managed to resolve the error by re-connecting with admin credentials.
I was using PG Admin V4 with Postgres V9.6, and that was the only message appearing in any query I executed, even if it was a basic query like 'SELECT NOW()'.
At the same time, this was the error message being received by the client device (an iOS device with a AWS Lambda / NodeJS backend) :
'message' : {
'name' : 'error',
'length' : 114,
'severity' : 'fatal',
'code' : '28000',
'file' : 'miscinit.c',
'line' : '587',
'routine' : 'InitializeSessionUserId'
}

Answer 1

I assume you found a solution, but for anyone else that finds this post, I had the same issue and I just closed PG Admin 4 and restarted it and it cleared up.

Answer 2

To anyone who has this problem, all you have to do is:
1) Reconnect to the database
2) Open a new Query Tab. (Run your query here)
You're welcome.

Answer 3

For me helped changing 'localhost' in connection settings to '127.0.0.1', as mentioned here: https://stackoverflow.com/a/59747781/2590805

Answer 4

Disconnecting and reconnecting to the database solved this issue for me; it wasn't necessary to exit/open PGAdmin 4 completely.

Answer 5

Create a new Query editor tab, that works for me

Answer 6

This is not a PostgreSQL error message. It must come from something else in the stack you are using - a client driver, ORM, etc.
Please post a more detailed question with full information on the stack you're using.

Answer 7

So I don't know the exact specifics of my solution, but I found this issue in the following circumstance:
Database user was created.
Role was assigned for the user.
A transaction was used
I'm still not entirely sure I discovered the solution of the root problem, but if others have the same scenario, it might help troubleshoot it further. If any of those three are not used, then I never encountered the issue.

Answer 8

Has anyone found an explanation for this problem? I am also getting a "Transaction ID not found in the session.". It's for a long running (several days) query. I ran it on a 10% sample of my data and had no trouble, but now need to repeat the process for the full dataset. I reconnect to the database and the query appears as still active. A new idle query appears as follows:
SELECT rel.oid, rel.relname AS name,
(SELECT count(*) FROM pg_trigger WHERE tgrelid=rel.oid AND tgisinternal = FALSE) AS triggercount,
(SELECT count(*) FROM pg_trigger WHERE tgrelid=rel.oid AND tgisinternal = FALSE AND tgenabled = 'O') AS has_enable_triggers,
(CASE WHEN rel.relkind = 'p' THEN true ELSE false END) AS is_partitioned
FROM pg_class rel
WHERE rel.relkind IN ('r','s','t','p') AND rel.relnamespace = 2200::oid
AND NOT rel.relispartition
ORDER BY rel.relname;