I got 601 error and I cannot find any documents on that.

[master-engine] – RegistrationService – Could not register. Sleeping for 28000ms before attempting again.
[master-engine] – RegistrationService – This node is unregistered. It will attempt to register using the registration.url
[master-engine] – DataLoaderService – Using registration URL of http://symmetricds-service:31415/sync/register/registration
[master-engine] – RegistrationService – Unexpected error during registration: Received an unexpected response code of 601 from the server org.
jumpmind.exception.HttpException: Received an unexpected response code of 601 from the server

my setup using k8s

cat <<EOF | kubectl apply -f –
apiVersion: apps/v1
kind: Deployment
metadata:
name: symmetricds-deployment
spec:
replicas: 1
selector:
matchLabels:
app: symmetricds
template:
metadata:
labels:
app: symmetricds
spec:
containers:
– name: symmetricds
image: jumpmind/symmetricds:3.15.7
ports:
– containerPort: 31415
command: [“/bin/sh”, “-c”]
args:
– |
apk update && apk add curl
mkdir -p /opt/symmetric-ds/engines &&
curl -L -o /opt/symmetric-ds/lib/mariadb-java-client.jar https://downloads.mariadb.com/Connectors/java/connector-java-2.7.5/mariadb-java-client-2.7.5.jar &&
echo “engine.name=master-engine
db.driver=org.mariadb.jdbc.Driver
# com.mysql.cj.jdbc.Driver
db.url=jdbc:mysql://mariadb1-service:3306/source_db
db.user=root
db.password=root_password1
group.id=source
external.id=node1
sync.url=http://symmetricds-service:31415/sync/master-engine
registration.url=http://symmetricds-service:31415/sync/register
db.target.driver=org.mariadb.jdbc.Driver
# com.mysql.cj.jdbc.Driver
db.target.url=jdbc:mysql://mariadb2-service:3306/target_db
db.target.user=root
db.target.password=root_password2
db.additional.driver=org.mariadb.jdbc.Driver
# com.mysql.cj.jdbc.Driver
db.additional.url=jdbc:mysql://mariadb3-service:3306/additional_db
db.additional.user=root
db.additional.password=root_password3
channel.default.max_batch_size=1000
channel.default.enabled=true
create.sym_node_group=true
create.sym_node_group_link=true
trigger.exclude.tables.regex=^(mysql|information_schema|performance_schema|sys)..$
trigger.include.tables.regex=^[^mysql|information_schema|performance_schema|sys]..%
sync.interval.ms=60000
log.level=INFO
initial.load.create.first=true
” > /opt/symmetric-ds/engines/engine.properties &&
/opt/symmetric-ds/bin/sym

apiVersion: v1
kind: Service
metadata:
name: symmetricds-service
spec:
selector:
app: symmetricds
ports:

• protocol: TCP
  port: 31415
  targetPort: 31415
  type: LoadBalancer

apiVersion: apps/v1
kind: Deployment
metadata:
name: mariadb1-deployment
spec:
replicas: 1
selector:
matchLabels:
app: mariadb1
template:
metadata:
labels:
app: mariadb1
spec:
containers:
– name: mariadb1
image: mariadb:latest
env:
– name: MYSQL_ROOT_PASSWORD
value: root_password1
– name: MYSQL_DATABASE
value: source_db
ports:
– containerPort: 3306

apiVersion: v1
kind: Service
metadata:
name: mariadb1-service
spec:
selector:
app: mariadb1
ports:

• protocol: TCP
  port: 3306
  targetPort: 3306
  type: ClusterIP

apiVersion: apps/v1
kind: Deployment
metadata:
name: mariadb2-deployment
spec:
replicas: 1
selector:
matchLabels:
app: mariadb2
template:
metadata:
labels:
app: mariadb2
spec:
containers:
– name: mariadb2
image: mariadb:latest
env:
– name: MYSQL_ROOT_PASSWORD
value: root_password2
– name: MYSQL_DATABASE
value: target_db
ports:
– containerPort: 3306

apiVersion: v1
kind: Service
metadata:
name: mariadb2-service
spec:
selector:
app: mariadb2
ports:

• protocol: TCP
  port: 3306
  targetPort: 3306
  type: ClusterIP

apiVersion: apps/v1
kind: Deployment
metadata:
name: mariadb3-deployment
spec:
replicas: 1
selector:
matchLabels:
app: mariadb3
template:
metadata:
labels:
app: mariadb3
spec:
containers:
– name: mariadb3
image: mariadb:latest
env:
– name: MYSQL_ROOT_PASSWORD
value: root_password3
– name: MYSQL_DATABASE
value: additional_db
ports:
– containerPort: 3306

apiVersion: v1
kind: Service
metadata:
name: mariadb3-service
spec:
selector:
app: mariadb3
ports:

• protocol: TCP
  port: 3306
  targetPort: 3306
  type: ClusterIP

EOF

Symmetric can sync from 1 source to 2 targets