[PS8QA] PS startup is failing if we have innodb_buffer_pool_size option in the persisted configuration file and in startup command.

Start server with my.cnf file
/dev/shm/qa/ps80/bin/mysqld --defaults-file=my.cnf &

my.cnf

[mysqld]
core-file
basedir=/dev/shm/qa/ps80
tmpdir=/dev/shm/qa/ps80/data
datadir=/dev/shm/qa/ps80/data
plugin-load-add=tokudb=ha_tokudb.so
tokudb-check-jemalloc=0
plugin-load-add=rocksdb=ha_rocksdb.so
socket=/dev/shm/qa/ps80/socket.sock
port=14306
log-error=/dev/shm/qa/ps80/log/master.err
server-id=100

2) Change innodb_buffer_pool_size configuration variable with the SET PERSISTstatement.

8.0.12>select @@innodb_buffer_pool_size;
+---------------------------+
| @@innodb_buffer_pool_size |
+---------------------------+
|                 134217728 |
+---------------------------+
1 row in set (0.00 sec)

8.0.12>SET PERSIST innodb_buffer_pool_size = 512 * 1024 * 1024;
Query OK, 0 rows affected (0.00 sec)

8.0.12>select @@innodb_buffer_pool_size;
+---------------------------+
| @@innodb_buffer_pool_size |
+---------------------------+
|                 536870912 |
+---------------------------+
1 row in set (0.00 sec)

8.0.12>

This variable info will be saved in mysqld-auto.cnf file (inside datadir)

3) restart server with innodb_buffer_pool_size in startup command.

/dev/shm/qa/ps80/bin/mysqld --defaults-file=my.cnf --innodb_buffer_pool_size=1G &

Startup is failing with following error.

2018-11-21T03:56:53.628241Z 0 [System] [MY-010116] [Server] /dev/shm/qa/ps80/bin/mysqld (mysqld 8.0.12-2-debug) starting as process 9804
2018-11-21T03:56:55.375075Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2018-11-21T03:56:55.375298Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location '/dev/shm' in the path is accessible to all OS users. Consider choosing a different directory.
2018-11-21T03:56:55.462166Z 0 [System] [MY-010931] [Server] /dev/shm/qa/ps80/bin/mysqld: ready for connections. Version: '8.0.12-2-debug'  socket: '/dev/shm/qa/ps80/socket.sock'  port: 14306  MySQL Community Server (GPL).
2018-11-21T03:57:51.710485Z 11 [System] [MY-013172] [Server] Received SHUTDOWN from user root. Shutting down mysqld (Version: 8.0.12-2-debug).
2018-11-21T03:57:54.575421Z 0 [Warning] [MY-010909] [Server] /dev/shm/qa/ps80/bin/mysqld: Forcing close of thread 10  user: 'root'.
2018-11-21T03:57:56.406896Z 0 [System] [MY-010910] [Server] /dev/shm/qa/ps80/bin/mysqld: Shutdown complete (mysqld 8.0.12-2-debug)  MySQL Community Server (GPL).
2018-11-21T03:57:56.967318Z 0 [System] [MY-010116] [Server] /dev/shm/qa/ps80/bin/mysqld (mysqld 8.0.12-2-debug) starting as process 18250
2018-11-21T03:57:58.503848Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2018-11-21T03:57:58.504065Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location '/dev/shm' in the path is accessible to all OS users. Consider choosing a different directory.
2018-11-21T03:57:58.647506Z 5 [ERROR] [MY-011268] [Server] Configuring persisted options failed: "Variable 'innodb_buffer_pool_size' can't be set to the value of '536870912'".
2018-11-21T03:57:58.647583Z 0 [ERROR] [MY-010175] [Server] Setting persistent options failed.