Selenium 独立服务器未启动 [英] Selenium standalone server not starting
问题描述
在我的 VPS 上启动 selenium 独立服务器时遇到了麻烦
I'm running into trouble while starting selenium standalone server on my VPS
root@PIV:/usr/share/nginx/pivdev/tests# java -jar selenium-server.jar
输出:
21:53:08.857 INFO - Launching a standalone Selenium Server
21:53:08.911 INFO - Java: Oracle Corporation 24.79-b02
21:53:08.914 INFO - OS: Linux 3.13.0-52-generic amd64
21:53:08.945 INFO - v2.47.1, with Core v2.47.1. Built from revision 411b314
21:53:09.070 INFO - Driver provider org.openqa.selenium.ie.InternetExplorerDriver registration is skipped:
registration capabilities Capabilities [{platform=WINDOWS, ensureCleanSession=true, browserName=internet explorer, version=}] does not match the current platform LINUX
21:53:09.071 INFO - Driver provider org.openqa.selenium.edge.EdgeDriver registration is skipped:
registration capabilities Capabilities [{platform=WINDOWS, browserName=MicrosoftEdge, version=}] does not match the current platform LINUX
21:53:09.071 INFO - Driver class not found: com.opera.core.systems.OperaDriver
21:53:09.071 INFO - Driver provider com.opera.core.systems.OperaDriver is not registered
之后不再有输出.在本地，相同的命令就像一个魅力.任何提示如何解决这个问题?
No more output after that. Locally the same command works like like a charm. Any hint how to fix this issue ?
Java
root@PIV:/usr/share/nginx/pivdev/tests# java -version
java version "1.7.0_79"
OpenJDK Runtime Environment (IcedTea 2.5.6) (7u79-2.5.6-0ubuntu1.14.04.1)
OpenJDK 64-Bit Server VM (build 24.79-b02, mixed mode)
更新 1
该服务根本没有在任何端口上运行
The service is not running on any port at all
网络统计输出
root@PIV:~# netstat -plnt
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 898/sshd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1247/sendmail: MTA:
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN 974/mysqld
tcp 0 0 127.0.0.1:587 0.0.0.0:* LISTEN 1247/sendmail: MTA:
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1005/nginx
tcp 0 0 0.0.0.0:81 0.0.0.0:* LISTEN 1005/nginx
tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN 496/vsftpd
tcp6 0 0 :::22 :::* LISTEN 898/sshd
tcp6 0 0 :::35484 :::* LISTEN 2036/java
tcp6 0 0 :::50920 :::* LISTEN 2036/java
tcp6 0 0 :::8080 :::* LISTEN 2036/java
更新 2
好的，这里的主要问题是 selenium 服务器在启动时卡住了，我不知道为什么.我摧毁了我的 VPS 机器并从头开始.在我停止并再次启动后，硒服务器启动了一次(并且在重新启动后仍然存在).有时它甚至在第一次尝试时也不起作用.
Ok, the main issue here is that selenium server is getting stuck on startup, and I dont know why. I destroyed my VPS machine and started from scratch. The selenium server booted up once, after I stopped and started again the issue happened(And persists after reboot). Sometimes it doesnt works even on the first try.
我不确定是 java 问题还是 selenium 服务器问题，还是我的 VPS 主机问题.
I'm not sure if its either a java problem or selenium server problem or my VPS host problem.
推荐答案
长篇大论:
Selenium 使用/dev/random(不知道为什么，不要问)，它正在等待足够的熵来生成随机数.
Selenium uses /dev/random (don't know why, dont ask) and it was waiting for enough entropy to generate the random number.
修复
只需在启动selenium时添加参数:-Djava.security.egd=file:///dev/urandom switch就可以了
Just add the parameter when starting selenium: -Djava.security.egd=file:///dev/urandom switch and you're good to go
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