No Java runtime present, requesting install. Error: Another Selenium process is already running

[starryeyez024]

@vvo, In my Polymer project, in the file: polymer/node_modules/web-component-tester/node_modules/wct-local/package.json, it specifies using selenium-standalone 4.6.1 or greater and I still have this issue.

package.json:

  "dependencies": {
    "chalk": "^1.1.1",
    "cleankill": "^1.0.0",
    "freeport": "^1.0.4",
    "launchpad": "^0.4.4",
    "lodash": "^3.0.1",
    "selenium-standalone": "^4.6.1",
    "which": "^1.0.8"
  },

error message:

^MBP:polymer $ gulp test:local
[15:11:20] Using gulpfile ~/Sites/polymer/gulpfile.js
[15:11:20] Starting 'wct:local'...
Installing and starting Selenium server for local browsers
----------
selenium-standalone installation starting
----------

---
selenium install:
from: http://selenium-release.storage.googleapis.com/2.47/selenium-server-standalone-2.47.1.jar
to: /Users/---/Sites/polymer/node_modules/web-component-tester/node_modules/wct-local/node_modules/selenium-standalone/.selenium/selenium-server/2.47.1-server.jar

---
chrome install:
from: http://chromedriver.storage.googleapis.com/2.18/chromedriver_mac32.zip
to: /Users/---/Sites/polymer/node_modules/web-component-tester/node_modules/wct-local/node_modules/selenium-standalone/.selenium/chromedriver/2.18-x64-chromedriver

---
File from http://selenium-release.storage.googleapis.com/2.47/selenium-server-standalone-2.47.1.jar has already been downloaded

---
File from http://chromedriver.storage.googleapis.com/2.18/chromedriver_mac32.zip has already been downloaded
-----
selenium-standalone installation finished
-----
No Java runtime present, requesting install.
[15:11:22] 'wct:local' errored after 1.41 s
[15:11:22] Error: Another Selenium process is already running

I also get a popup saying "To view this web content, you need to install the Java Runtime Environment" - which I have done. When I visit the Java install page it says "You have the recommended Java installed (Version 8 Update 60). "

originally posted here

[sebs]

did you find a solution?

[RedBulli]

I got this working by installing the Java Development Kit

[sebs]

I had a similar experience: My ableton live was giving me the same message and I installed a OLD Java development Kit. That worked for ableton live and its "Max for Live" system. Coming from this I found a helper to manage different java versions.

https://github.com/gcuisinier/jenv

If you are using your computer for more than one job, there might be a conflict anyways. However with the new Java version, I got a new error but a very good clue. ;)

Ill be back with more news ;)

[vvo]

@starryeyez024 Do you have java installed? What does java -version states? Thanks

[starryeyez024]

I think the source of my problems was that I needed to install a JDK. I didn't realize a JRE and JDK were two distinct things. I was getting this:

$ java -version
No Java runtime present, requesting install.
$ javac -version
No Java runtime present, requesting install.

Then I Installed: Java SE 8ux
and ran the commands again:

$ javac -version
javac 1.8.0_65
$ java -version
java version "1.8.0_65"
Java(TM) SE Runtime Environment (build 1.8.0_65-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.65-b01, mixed mode)

[vvo]

Great, fixed?

[DullReferenceException]

It would be really great if this was reopened and the fix was somehow giving an error message that describes that a JDK cannot be found; many developers at my company have been bit by this and wasted time searching for a rogue running selenium process that does not exist.

[vvo]

I am open to PR on this subject :)