Problem with TestTestgresCommon::test_replicate__target_context #456

    def test_replicate__target_context(self, node_svc: PostgresNodeService):
        assert isinstance(node_svc, PostgresNodeService)
    
        with __class__.helper__get_node(node_svc) as master:
            master.init(allow_streaming=True).start()
    
            target_port = node_svc.port_manager.reserve_port()
            assert target_port != master.port
            try:
                # For local operations use an equivalent host spelling to
                # exercise source_walsender with different host strings.  A
                # remote host must keep its configured address.
                if isinstance(node_svc.os_ops, LocalOperations):
                    target_host = "localhost" if master.host != "localhost" else "127.0.0.1"
                else:
                    target_host = master.host
    
                with master.replicate(
                    target_os_ops=node_svc.os_ops,
                    target_host=target_host,
                    target_port=target_port,
                ) as replica:
                    assert type(replica) is PostgresNode
                    assert replica.os_ops is node_svc.os_ops
                    assert replica.host == target_host
                    assert replica.port == target_port
                    assert replica.port_manager is None
    
>                   replica.start()

__class__  = <class 'tests.test_testgres_common.TestTestgresCommon'>
master     = PostgresNode(name='testgres-2804cd16-975a-489c-8953-e2ffce9b1555', port=None, base_dir='/tmp/tgsn_pswn_xh7')
node_svc   = <tests.helpers.global_data.PostgresNodeService object at 0x739ba8b749e0>
replica    = PostgresNode(name='testgres-25e6fc4b-3f48-475b-b2e8-ea4b5598d3f7', port=None, base_dir='/tmp/tgsb_p9wksm1o')
self       = <tests.test_testgres_common.TestTestgresCommon object at 0x739ba77cb590>
target_host = 'localhost'
target_port = 21290

tests/test_testgres_common.py:2232: 

E       
E       /tmp/tgsb_p9wksm1o/logs/postgresql.log
E       ----
E       b'2026-10-23 18:11:49.813 GMT [23230] LOG:  starting PostgreSQL 16.15 on x86_64-pc-linux-musl, compiled by gcc (Alpine 15.2.0) 15.2.0, 64-bit
2026-10-23 18:11:49.813 GMT [23230] LOG:  listening on IPv6 address "::1", port 22106
2026-10-23 18:11:49.813 GMT [23230] LOG:  could not bind IPv4 address "127.0.0.1": Address in use
2026-10-23 18:11:49.813 GMT [23230] HINT:  Is another postmaster already running on port 22106? If not, wait a few seconds and retry.
2026-10-23 18:11:49.813 GMT [23230] FATAL:  lock file "/var/run/postgresql/.s.PGSQL.22106.lock" already exists
2026-10-23 18:11:49.813 GMT [23230] HINT:  Is another postmaster (PID 23188) using socket file "/var/run/postgresql/.s.PGSQL.22106"?
2026-10-23 18:11:49.814 GMT [23230] LOG:  database system is shut down
'```

Artefacts:
[testgres--test_logs--20261023_180604-alpine-py3_12_xx-pg16_xx-id39990139492.zip](https://github.com/user-attachments/files/33892561/testgres--test_logs--20261023_180604-alpine-py3_12_xx-pg16_xx-id39990139492.zip)