Error running "gh-ost" on Aurora get errors

I been running "gh-ost" against Aurora , and at the end of the sessions , I allways get errors (not encounter on regular MySql Servers, even do all the process appear to be successful

Running "gh-ost" using this command: cut-over=atomic

gh-ost --host=yacov-aurora-db.cluster-ci59a3jianey.us-east-2.rds.amazonaws.com \
--user=telegram \
--execute \
--password=Admin180 \
--database=telegram \
--table=social_monitor_m3u8_small \
--alter="DROP COLUMN x" \
--chunk-size=30000 \
--max-load=Threads_running=20 \
--allow-on-master \
--switch-to-rbr \
--cut-over=atomic \
--cut-over-lock-timeout-seconds=5 \
--initially-drop-ghost-table \
--initially-drop-old-table \
--initially-drop-socket-file \
--exact-rowcount \
--concurrent-rowcount \
--panic-flag-file=/tmp/ghost.panic.flag ֿ

I get those error at the end of the process:

Copy: 196000/199999 98.0%; Applied: 0; Backlog: 0/1000; Time: 2m32s(total), 2m18s(copy); streamer: mysql-bin-changelog.000068:24229615; Lag: 0.75s, HeartbeatLag: 0.80s, State: migrating; ETA: 2s
Copy: 198000/199999 99.0%; Applied: 0; Backlog: 0/1000; Time: 2m33s(total), 2m19s(copy); streamer: mysql-bin-changelog.000068:24990974; Lag: 0.50s, HeartbeatLag: 0.51s, State: migrating; ETA: 1s
Copy: 199999/199999 100.0%; Applied: 0; Backlog: 0/1000; Time: 2m34s(total), 2m20s(copy); streamer: mysql-bin-changelog.000068:25743114; Lag: 0.29s, HeartbeatLag: 0.29s, State: migrating; ETA: due
Copy: 199999/199999 100.0%; Applied: 0; Backlog: 0/1000; Time: 2m35s(total), 2m20s(copy); streamer: mysql-bin-changelog.000068:25744498; Lag: 0.37s, HeartbeatLag: 0.42s, State: migrating; ETA: due
# Migrating `telegram`.`social_monitor_m3u8_small`; Ghost table is `telegram`.`_social_monitor_m3u8_small_gho`
# Migrating ip-10-20-2-127:3306; inspecting ip-10-20-2-127:3306; executing on orarac-lab-01
# Migration started at Wed Aug 03 11:49:27 +0300 2022
# chunk-size: 2000; max-lag-millis: 1500ms; dml-batch-size: 10; max-load: Threads_running=20; critical-load: ; nice-ratio: 0.000000
# throttle-additional-flag-file: /tmp/gh-ost.throttle
# panic-flag-file: /tmp/ghost.panic.flag
# Serving on unix socket: /tmp/gh-ost.telegram.social_monitor_m3u8_small.sock
Copy: 199999/199999 100.0%; Applied: 0; Backlog: 0/1000; Time: 2m37s(total), 2m20s(copy); streamer: mysql-bin-changelog.000068:25748079; Lag: 1.46s, HeartbeatLag: 1.47s, State: migrating; ETA: due
2022-08-03 11:52:12 ERROR Error 1205: Lock wait timeout exceeded; try restarting transaction
Copy: 199999/199999 100.0%; Applied: 0; Backlog: 0/1000; Time: 2m45s(total), 2m20s(copy); streamer: mysql-bin-changelog.000068:25749842; Lag: 6.97s, HeartbeatLag: 6.98s, State: migrating; ETA: due
Copy: 199999/199999 100.0%; Applied: 0; Backlog: 0/1000; Time: 2m40s(total), 2m20s(copy); streamer: mysql-bin-changelog.000068:25749842; Lag: 1.96s, HeartbeatLag: 1.98s, State: migrating; ETA: due
2022-08-03 11:52:14 ERROR Error 1205: Lock wait timeout exceeded; try restarting transaction
Copy: 199999/199999 100.0%; Applied: 0; Backlog: 0/1000; Time: 2m50s(total), 2m20s(copy); streamer: mysql-bin-changelog.000068:25754144; Lag: 11.21s, HeartbeatLag: 11.21s, State: throttled, lag=10.007112s; ETA: due
# Migrating `telegram`.`social_monitor_m3u8_small`; Ghost table is `telegram`.`_social_monitor_m3u8_small_gho`
# Migrating ip-10-20-2-127:3306; inspecting ip-10-20-2-127:3306; executing on orarac-lab-01
# Migration started at Wed Aug 03 11:49:27 +0300 2022
# chunk-size: 2000; max-lag-millis: 1500ms; dml-batch-size: 10; max-load: Threads_running=20; critical-load: ; nice-ratio: 0.000000
# throttle-additional-flag-file: /tmp/gh-ost.throttle
# panic-flag-file: /tmp/ghost.panic.flag
# Serving on unix socket: /tmp/gh-ost.telegram.social_monitor_m3u8_small.sock
Copy: 199999/199999 100.0%; Applied: 0; Backlog: 0/1000; Time: 2m54s(total), 2m20s(copy); streamer: mysql-bin-changelog.000068:25762253; Lag: 1.56s, HeartbeatLag: 1.66s, State: migrating; ETA: due
Copy: 199999/199999 100.0%; Applied: 0; Backlog: 0/1000; Time: 2m55s(total), 2m20s(copy); streamer: mysql-bin-changelog.000068:25764016; Lag: 0.35s, HeartbeatLag: 0.43s, State: migrating; ETA: due
[2022/08/03 11:52:27] [info] binlogsyncer.go:164 syncer is closing...
[2022/08/03 11:52:27] [error] binlogsyncer.go:631 connection was bad
[2022/08/03 11:52:27] [error] binlogstreamer.go:77 close sync with err: Sync was closed
[2022/08/03 11:52:27] [info] binlogsyncer.go:179 syncer is closed
Copy: 199999/199999 100.0%; Applied: 0; Backlog: 0/1000; Time: 3m0s(total), 2m20s(copy); streamer: mysql-bin-changelog.000068:25767175; Lag: 1.35s, HeartbeatLag: 1.42s, State: migrating; ETA: due
2022-08-03 11:52:29 ERROR sql: database is closed
2022-08-03 11:52:29 ERROR sql: database is closed
# Done
2022-08-03 11:52:29 ERROR sql: database is closed

Running "gh-ost" using this command: cut-over=two-step

gh-ost --host=yacov-aurora-db.cluster-ci59a3jianey.us-east-2.rds.amazonaws.com \
--user=telegram \
--execute \
--password=Admin180 \
--database=telegram \
--table=social_monitor_m3u8_small \
--alter="ADD COLUMN x INT(12) NOT NULL DEFAULT 0" \
--chunk-size=30000 \
--max-load=Threads_running=20 \
--allow-on-master \
--switch-to-rbr \
--cut-over=two-step \
--cut-over-lock-timeout-seconds=5 \
--initially-drop-ghost-table \
--initially-drop-old-table \
--initially-drop-socket-file \
--exact-rowcount \
--concurrent-rowcount \
--panic-flag-file=/tmp/ghost.panic.flag ֿ

Return less error but steel:

Copy: 199999/199999 100.0%; Applied: 0; Backlog: 0/1000; Time: 1m0s(total), 40s(copy); streamer: mysql-bin-changelog.000068:67576070; Lag: 0.24s, HeartbeatLag: 30.33s, State: migrating; ETA: due
Copy: 199999/199999 100.0%; Applied: 0; Backlog: 0/1000; Time: 1m5s(total), 40s(copy); streamer: mysql-bin-changelog.000068:73800252; Lag: 0.30s, HeartbeatLag: 31.83s, State: migrating; ETA: due
Copy: 199999/199999 100.0%; Applied: 0; Backlog: 0/1000; Time: 1m10s(total), 40s(copy); streamer: mysql-bin-changelog.000068:85012903; Lag: 0.22s, HeartbeatLag: 31.23s, State: migrating; ETA: due
# Migrating `telegram`.`social_monitor_m3u8_small`; Ghost table is `telegram`.`_social_monitor_m3u8_small_gho`
# Migrating ip-10-20-2-127:3306; inspecting ip-10-20-2-127:3306; executing on orarac-lab-01
# Migration started at Wed Aug 03 11:59:36 +0300 2022
# chunk-size: 30000; max-lag-millis: 1500ms; dml-batch-size: 10; max-load: Threads_running=20; critical-load: ; nice-ratio: 0.000000
# throttle-additional-flag-file: /tmp/gh-ost.throttle
# panic-flag-file: /tmp/ghost.panic.flag
# Serving on unix socket: /tmp/gh-ost.telegram.social_monitor_m3u8_small.sock
Copy: 199999/199999 100.0%; Applied: 0; Backlog: 0/1000; Time: 1m14s(total), 40s(copy); streamer: mysql-bin-changelog.000068:101173009; Lag: 0.30s, HeartbeatLag: 0.32s, State: migrating; ETA: due
[2022/08/03 12:00:52] [info] binlogsyncer.go:164 syncer is closing...
[2022/08/03 12:00:52] [error] binlogstreamer.go:77 close sync with err: sync is been closing...
[2022/08/03 12:00:52] [info] binlogsyncer.go:179 syncer is closed
# Done

Aurora Configuration:

mysql> show variables like 'aurora_enable_repl_bin_log_filtering';
+--------------------------------------+-------+
| Variable_name | Value |
+--------------------------------------+-------+
| aurora_enable_repl_bin_log_filtering | OFF |
+--------------------------------------+-------+
1 row in set (0.14 sec)

mysql> show variables like 'binlog_format';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| binlog_format | ROW |
+---------------+-------+
1 row in set (0.14 sec)

mysql> show variables like 'aurora_parallel_query';
+-----------------------+-------+
| Variable_name | Value |
+-----------------------+-------+
| aurora_parallel_query | ON |
+-----------------------+-------+
1 row in set (0.13 sec)

mysql> show variables like 'binlog_row_image';
+------------------+-------+
| Variable_name | Value |
+------------------+-------+
| binlog_row_image | FULL |
+------------------+-------+
1 row in set (0.14 sec)

Errors where reproducible on two different environments runs on Aurora each time.

"gh-ost" run on

Linux host 3.10.0-1062.9.1.el7.x86_64 #1 SMP Mon Dec 2 08:31:54 EST 2019 x86_64 x86_64 x86_64 GNU/Linux

"gh-ost" version

[root@orarac-lab-01 ~]# gh-ost --version
1.1.5

Aurora Version:

mysql> select AURORA_VERSION(); select @@aurora_version; show variables like '%version';
+------------------+
| AURORA_VERSION() |
+------------------+
| 2.10.2 |
+------------------+
1 row in set (0.15 sec)

+------------------+
| @@aurora_version |
+------------------+
| 2.10.2 |
+------------------+
1 row in set (0.15 sec)

+------------------+-----------------------+
| Variable_name | Value |
+------------------+-----------------------+
| aurora_version | 2.10.2 |
| innodb_version | 5.7.12 |
| protocol_version | 10 |
| tls_version | TLSv1,TLSv1.1,TLSv1.2 |
| version | 5.7.12-log |
+------------------+-----------------------+
5 rows in set (0.14 sec)