Selenium独立服务器未启动 [英] Selenium standalone server not starting
问题描述
在我的VPS上启动硒独立服务器时遇到麻烦
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
此后没有更多输出. 在本地，相同的命令就像一个超级按钮一样工作.任何提示如何解决此问题?
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
该服务根本不在任何端口上运行
The service is not running on any port at all
Netstat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，这里的主要问题是硒服务器在启动时卡住了，我不知道为什么.我销毁了我的VPS机器并从头开始.硒服务器启动一次，在我停止并再次启动后，问题发生了(并在重新启动后仍然存在).有时即使第一次尝试也不起作用.
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
简短的故事:
Selenium使用/dev/random(不知道为什么，不问)，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
只需在启动硒时添加参数:-Djava.security.egd=file:///dev/urandom switch，您就很好了
Just add the parameter when starting selenium: -Djava.security.egd=file:///dev/urandom switch and you're good to go
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