问题描述
我有一个用于HDFS的多节点独立hadoop集群。我能够将数据加载到HDFS，但是每次重新启动计算机并通过import * as React from 'react';
export interface FormProps {
}
export interface FormState {
personal: any
}
class Form extends React.Component<FormProps,FormState> {
constructor(props: FormProps) {
super(props)
this.state = {
personal: {
firstName: "",lastName: "",}
}
}
count = 0;
handleChange = (event: any) => {
let personal = { ...this.state.personal };
personal[event.target.name] = event.target.value;
this.setState({ personal })
}
renderFields = () => {
this.count++;
console.log('render fields call count = ',this.count);
return (
<div>
<h1>first name</h1>
<input type="text" name="firstName" value={this.state.personal.firstName} onChange={this.handleChange} />
<h1>last name</h1>
<input type="text" name="lastName" value={this.state.personal.lastName} onChange={this.handleChange} />
</div>
)
}
render() {
return (
this.renderFields()
);
}
}
export default Form;
启动群集时，直到执行"personal":{
"fields":[
{
"label":"name","type":"text"
},{
"label":"id","type":"number"
}
]
}
这会擦除所有数据后，我才能看到仪表板。
如何启动hadoop集群而不必经历start-dfs.sh？
解决方法
在关闭计算机之前，您需要彻底关闭hdfs和namenode（stop-dfs）。否则，您可能会破坏名称节点，导致您需要进行格式化才能恢复到干净状态