windson opened a new issue, #23533:
URL: https://github.com/apache/shardingsphere/issues/23533
## Bug Report
Hi, I am trying to connect to the existing tables in mysql databases db0 and
db1 by registering them as storage units using the following command:
```
REGISTER STORAGE UNIT ds_0 (
HOST="127.0.0.1",
PORT=3306,
DB="db0",
USER="root",
PASSWORD="blah"
),ds_1 (
HOST="127.0.0.1",
PORT=3306,
DB="db1",
USER="root",
PASSWORD="blah"
);
```
Before report a bug, make sure you have:
- Searched open and closed [GitHub
issues](https://github.com/apache/shardingsphere/issues).
- Read documentation: [ShardingSphere
Doc](https://shardingsphere.apache.org/document/current/en/overview).
Please pay attention on issues you submitted, because we maybe need more
details.
If no response anymore and we cannot reproduce it on current information, we
will **close it**.
Please answer these questions before submitting your issue. Thanks!
### Which version of ShardingSphere did you use?
5.3.1
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-Proxy
### Expected behavior
Add the storage units properly.
### Actual behavior
ERROR 19000 (44000): Can not process invalid storage units, error message
is: [Invalid data source `ds_0`, error message is: Communications link failure,
Invalid data source `ds_1`, error message is: Communications link failure]
### Reason analyze (If you can)
DistSQL is being used.
### Steps to reproduce the behavior, such as: SQL to execute, sharding rule
configuration, when exception occur etc.
On my local DB:
```
mysql -h 127.0.0.1 --user=root -p
mysql>create database db0;
mysql>create database db1;
```
Create & Connect to ShardingSphere-Proxy,
```
docker run -d -v
/Users/pavankrn/Documents/tech/sspheredock/pgsphere/apache-shardingsphere-5.3.1-shardingsphere-proxy-bin/conf:/opt/shardingsphere-proxy/conf
-v
/Users/pavankrn/Documents/tech/sspheredock/pgsphere/apache-shardingsphere-5.3.1-shardingsphere-proxy-bin/ext-lib:/opt/shardingsphere-proxy/ext-lib
-e PORT=3308 -p13308:3308 apache/shardingsphere-proxy:latest
mysql --host=127.0.0.1 --user=root -p --port=13308 sharding_db
```
On ShardingSphere-Proxy's mysql terminal
```
use sharding_db;
REGISTER STORAGE UNIT ds_0 (
HOST="127.0.0.1",
PORT=3306,
DB="db0",
USER="root",
PASSWORD="blah"
),ds_1 (
HOST="127.0.0.1",
PORT=3306,
DB="db1",
USER="root",
PASSWORD="blah"
);
```
### Example codes for reproduce this issue (such as a github link).
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