Deadlock when inserting from multiple processes

[Dave Johansen <davejohansen@xxxxxxxxx>]

I'm using Postgres 9.2.15 on CentOS 7.2 with the method described below to support INSERTing from multiple processes:
http://www.postgresql.org/message-id/CAAcYxUf9o3NpiKaHdeShO_iJjm92314eX6ko0JvJidmksutkJg@xxxxxxxxxxxxxx

Last night, one of the processes experienced a dead lock. The error looked like this:

ERROR: deadlock detected

DETAIL: Process 23527 waits for ShareLock on transaction 1537228819; blocked by process 34184

        Process 34184 waits for ShareLock on transaction 1537228441; blocked by process 23527.

Is there anything I can do to help diagnose what the cause of this issue was?

Thanks,

Dave