problems using pg_start_backup/pg_stop_backup and pg_basebackup at same time - Mailing list pgsql-admin

I am experiencing two problems
1) pg_stop_backup hangs until pg_basebackup finishes

2) WAL contains references to invalid pages

(I suspect when 1. is fixed I won't experience 2. )

Full description below:

postgresql: 9.3.13

My situation is I create a writable report database every day using pg_start_backup() / rsync / pg_stop_backup()

(whole process takes 1-2 hours, the rsync actually copies the data dir of a  slave/warm spare DB)

Also once a week I create a database for backup/archive purposes using pg_basebackup

(whole process takes about 13 hours)

These two processes used to be able to coincide until recently.
Recent changes include a major debian upgrade and a minor version of postgres upgrade from 9.3.10.

Now when the report sync occurs during the pg_basebackup (w/ --xlog-method=stream option) the pg_stop_backup() hangs until

the the pg_basebackup has completed (4 hours later).

A labeled WAL backup file is created when the pg_stop_backup() is first executed and another

is created when the pg_basebackup completes.

While the pg_stop_backup() hangs the following appears in the logs:

until eventually:

The archive command appears to work as WAL files are being archived successfully with timestamps that occur while pg_stop_backup is hanging.

-rw------- 1 postgres postgres 314 Jun 11 12:56 000000030000109200000066.00000028.backup
-rw------- 1 postgres postgres 16M Jun 11 12:56 000000030000109300000029
-rw------- 1 postgres postgres 16M Jun 11 12:54 000000030000109300000028
-rw------- 1 postgres postgres 16M Jun 11 12:52 000000030000109300000027