test=# select walminer_wal_add('/home/jerome/pg10/data/pg_wal');
NOTICE: Get data dictionary from current database.
walminer_wal_add

1 file add success
(1 row)

test=# select walminer_start('null','null',0,0);
NOTICE: Change Wal Segment To:/home/jerome/pg10/data/pg_wal/000000010000000000000001
ERROR: fail to open file walminer/soreimage to write
CONTEXT: SQL function "walminer_start" statement 2