chenxb1986-优快云博客

转载 Angular响应式开发中报错Property 'map' does not exist on type 'Observable'.引用rxjs也没用。

Angular响应式开发源代码如下：import { Component, OnInit } from '@angular/core';import {Observable} from 'rxjs';// import { map } from 'rxjs/operators';import {Http} from '@angular/http';@Component({ sele...

2018-12-11 22:05:47 1595

转载响应式编程时出现：error TS2339: Property 'debounceTime' does not exist on type 'Observable<any>'.

constructor() { this.searchInput.valueChanges //.debounceTime(500) 无法使用 .pipe(debounceTime(1000)) .subscribe( stockCode => this.getStockInfo(stockCode)) ; .....省略 ...

2018-12-08 16:01:20 2191 1

原创 sublime Text 3 安装Package Control过程出现的两个问题的解决方法

安装过程出现两个问题：1）Package Control:There are no packages available for installation2)Package Control:Error parsing JSON from channel, https://packagecontrol.io/channel_v3.json第一个问题解决方法：启动sublime软件，依次点击...

2018-12-04 20:51:33 3694 3

原创 User xml file home/bigdata/cluster/azkaban/server/conf/azkaban-users.xml doesn't exist.

linux系统下安装Azkaban，启动过程出现错误：bigdata@linux server]$ bin/azkaban-web-start.sh Using Hadoop from Using Hive from bin/..:bin/../lib/azkaban-2.5.0.jar:bin/../lib/commons-collections-3.2.1.jar:bin/../li...

2018-11-20 18:20:41 403

原创 Cannot assign requested address: Service 'sparkMaster' failed after 16 retries (starting from 7077)!

spark-2.1.1-bin-hadoop2.7安装完成在启动时出现：“ Exception in thread “main” java.net.BindException: Cannot assign requested address: Service ‘sparkMaster’ failed after 16 retries (starting from 7077)! Consider e...

2018-11-20 10:29:05 5726

原创 ElasticSearch启动过程错误：org.elasticsearch.transport.BindTransportException: Failed to bind to [9300-9400

[2018-11-20T06:38:34,516][ERROR][o.e.b.Bootstrap ] [es-node] Exceptionorg.elasticsearch.transport.BindTransportException: Failed to bind to [9300-9400] at org.elasticsearch.transport.TcpTra...

2018-11-19 23:53:10 43182

转载 Angular 2 ngForm中的ngModel、[ngModel]和[(ngModel)]的写法

介绍了Angular 2 ngForm中的ngModel、[ngModel]和[(ngModel)]的区别ngModel如果单独使用ngModel，且没有为其赋值的话，它会在其所在的ngForm.value对象上添加一个property，此property的key值为ngModel所在组件设置的name属性的值：<form novalidate #f="ngForm"> &lt...

2018-11-15 11:43:04 1681

转载 Apache服务器和tomcat服务器、Nginx服务器区别

Apache与Tomcat都是Apache开源组织开发的用于处理HTTP服务的项目，两者都是免费的，都可以做为独立的Web服务器运行。Apache是Web服务器而Tomcat是Java应用服务器。Apache服务器只处理静态HTML，而tomcat服务器静态HTML 动态 JSP Servlet 都能处理。一般是把 Apache服务器与 tomcat服务器搭配在一起用：1） Apac...

2018-11-15 08:56:48 1259

原创 Failed to start component [StandardEngine[Tomcat].StandardHost[localhost].StandardContext[]]

**启动tomcat7的过程中出现以下错误“SEVERE: A child container failed during start java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat]....

2018-11-06 17:02:46 984

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