yuz10 opened a new issue #2935:
URL: https://github.com/apache/rocketmq/issues/2935
**BUG REPORT**
1. Please describe the issue you observed:
- What did you do (The steps to reproduce)?
run code below, register a kv config , key is `null`
```
public static void main(String[] args)
throws MQClientException, RemotingException, MQBrokerException,
InterruptedException {
DefaultMQAdminExt defaultMQAdminExt = new DefaultMQAdminExt();
defaultMQAdminExt.setNamesrvAddr("localhost:9876");
defaultMQAdminExt.start();
defaultMQAdminExt.createAndUpdateKvConfig("ORDER_TOPIC_CONFIG",
null, "broker-a:8");
defaultMQAdminExt.shutdown();
}
```
and then restart broker
- What did you expect to see?
broker restart successfully
- What did you see instead?
java.lang.NullPointerException
at
java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936)
at
org.apache.rocketmq.broker.topic.TopicConfigManager.updateOrderTopicConfig(TopicConfigManager.java:374)
at
org.apache.rocketmq.broker.BrokerController.doRegisterBrokerAll(BrokerController.java:979)
at
org.apache.rocketmq.broker.BrokerController.registerBrokerAll(BrokerController.java:951)
at
org.apache.rocketmq.broker.BrokerController.start(BrokerController.java:887)
at org.apache.rocketmq.broker.BrokerStartup.start(BrokerStartup.java:64)
at org.apache.rocketmq.broker.BrokerStartup.main(BrokerStartup.java:58)
2. Please tell us about your environment:
3. Other information (e.g. detailed explanation, logs, related issues,
suggestions how to fix, etc):
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