Knowledge Base/Troubleshooting

Selecting the JDK version the IDE will run under

Serge Baranov
posted this on March 27, 2013 16:33

Windows

JDK is bundled with all the product installers and it's recommended that you will use the provided JDK version unless there are any specific issues.

32-bit JDK is located in IDE_HOME\jre directory and is used by the 32-bit product executable.

To run the IDE in 64-bit mode you will need to download and install 64-bit JDK (not JRE) distribution and install it yourself. IDE will find and use it from the registry when you run the 64-bit .exe file (available only for IntelliJ IDEA right now, other products can use the .bat file to run in 64-bit mode).

<product>.exe uses this JDK search sequence:

  1. IDEA_JDK / WEBIDE_JDK / PYCHARM_JDK / RUBYMINE_JDK environment variable (depends on the product, WEBIDE_JDK applies to both WebStorm and PhpStorm)

  2. ..\jre directory
  3. system Registry
  4. JDK_HOME environment variable
  5. JAVA_HOME environment variable

idea64.exe uses this JDK search sequence:

  1. IDEA_JDK_64 environment variable
  2. ..\jre64 directory
  3. system Registry
  4. JDK_HOME environment variable
  5. JAVA_HOME environment variable

It’s also possible to start the IDE with <product>.bat file located in the bin directory, it uses the following JDK search sequence:

  1. IDEA_JDK / WEBIDE_JDK / PYCHARM_JDK / RUBYMINE_JDK environment variable (depends on the product)
  2. ..\jre directory
  3. JDK_HOME environment variable
  4. JAVA_HOME environment variable
Environment variable must point to the JDK installation home directory, for example:
c:\Program Files (x86)\Java\jdk1.7.0_17
  • /create-i4j-log command line switch can be used with the .exe to trace the JDK search sequence and find out why the specific JDK was chosen.
  • The actual JDK version used by the IDE can be verified in Help | About dialog (open any project to access the menu).
  • Define IDEA_JDK / WEBIDE_JDK / PYCHARM_JDK / RUBYMINE_JDK variable depending on the product to override the default version from IDE_HOME\jre.
  • Use Rapid Environment Editor to add/edit the variables, it will detect incorrect paths.

Linux

  • Refer to the distribution specific instructions for changing the default JDK version (Ubuntu Java documentation).
  • It's recommended that you will use the latest version of Oracle JDK 1.7 available for your system.
  • Check bin/<product>.sh file for the JDK search order, it's similar to Windows in terms of the environment variable names.
  • You can define JDK home environment variable directly in the .sh file to override system defaults.
  • Check this answer if you need to install the JDK manually on Linux.
  • Using OpenJDK is not recommended, it has known visual and performance problems that affect some users. Use on your own risk if Oracle JDK has more severe issues on your system.
  • If you have problems with ugly fonts, check this thread comments for the tips.
  • Help | About will show the actual JDK version.

Mac OS X

At the moment all our products require Apple JDK 1.6 to be installed in order to run on Mac. JDK 1.7 from Oracle is not officially supported yet and has known problems that stop us from using it by default. Oracle JDK 1.7.0_40 has added support for Retina and works much better than previous versions on Mac. You are welcome to give it a try in case you have any problems with Apple JDK.

To force running under JDK 1.7 edit /Applications/<Product>.app/Contents/Info.plist file, change JVMVersion from 1.6* to 1.7* :

<key>JVMVersion</key>
<string>1.7*</string>
  • See this answer for the known problems with JDK 1.7.
  • IDEA_JDK environment variable can be used to override the selected JDK, you may need to run the product from the Terminal so that it sees your environment variables (Mac OS limitation): open -a /Applications/<Product>.app/ .
  • Application About dialog will show the actual JDK version.

 

 

Comments

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Jgc

How can I run Idea 12 with the default Java 6 VM and target code and binaries to Java 7?

August 29, 2013 03:34
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Jgc

On Mac OS X 10.8.4

August 29, 2013 03:35
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Serge Baranov
JetBrains

Project/module SDK and byte code level doesn't depend on the JDK IDEA runs under. JDK is configured for the project/module in the File | Project Structure, refer to help for details.

http://www.jetbrains.com/idea/webhelp/configuring-global-project-and-module-sdks.html
http://www.jetbrains.com/idea/webhelp/compiler-java-compiler.html

August 29, 2013 03:37
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Brentboyer

Serge: did you make a typo for the "JAVA_HOME" env var?

Note under your Windows section that the first 2 occurrences (the first two 5. items) use "JAVA HOME" (no underscore, whereas the last one (the third 4. item) uses "JAVA_HOME" (with an underscore).

"JAVA_HOME" (with an underscore) is THE universal convention, to my knowledge.  I have never seen "JAVA HOME" before, indeed, I think that that space may cause all kinds of problems.

Please confirm what is going on, and correct your original posting if needed.

 

September 16, 2013 22:31
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Serge Baranov
JetBrains

Thanks, I've fixed the typo.

September 17, 2013 01:17
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Stephen Welch

Can I change the jdk used for database connections without changing the ide  jdk version?

October 10, 2013 13:41
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Serge Baranov
JetBrains

Stephen, why do you need to change the JDK version for the database connections? It's not possible at the moment, IDE JDK is always used.

October 10, 2013 14:53
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Frj

On OSx you can define environment variables in /etc/launcd.conf (create the file if it does not exist).

The variables defined in launchd.conf will be available in Terminal and for all other processes. The downside is that changes to the file are not picked up before restarting your system.

But if you just want to set IDEA_JDK once to 1.7 (instead of changing Info.plist in every EAP install you download) it is a pretty good solution - since it allows you to launch Intellij any way you want.

 

October 24, 2013 11:49
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Frj

Doh - spelled the file name wrong - the correct name is "/etc/launchd.conf".

 

October 24, 2013 12:41
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Pbw

If you want to do this the hard way, see

http://codepulsive.blogspot.com.au/2013/05/using-environmentplist-w...

and

http://codepulsive.blogspot.com.au/2013/05/setting-environment-vari...

 

It's the way I keep my shell and GUI environment variables synchronised. Before ML it was easier, using environment.plist, but ML broke that.  The ML solution still works with Mavericks.

 

November 06, 2013 14:00
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Pbw

An easier way, that maintains synchronisation of .profile and desktop environments.

http://codepulsive.blogspot.com.au/2013/11/setting-environment-vari...

 

November 06, 2013 21:31
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Pbw

12C seems to be completely broken for La Clojure under Mavericks.  I have a small clojure test project that hangs 12C when I try to open it. I have to force close.

November 07, 2013 02:59
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Pbw

It's broader than that for me. 12C seems to hang at the 'scanning files" stage on most projects. Nasty. Thank you Apple for the constant API changes. Is there any information I can forward?  It seems that you know the way out of this, but it is just going to take some time.

November 07, 2013 03:06
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Serge Baranov
JetBrains

Please report bugs to the issue tracker and attach thread dumps/logs when it hangs.

November 07, 2013 03:12
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Pbw

I've reported the bug: IDEA-116177. In the meantime, though, I seem to have found a fix for it.  I uninstalled the new Wacom Intuous 3 drivers I installed after upgrading to Mavericks. This may be useful information for others.

November 08, 2013 17:15
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Pbw

Still hanging if I set IDEA_JDK to Java 7. On this display, I would say that Mavericks is a disgrace to its developers. It is Java-hostile to an advanced degree.

November 09, 2013 04:14
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Li Acerphoenix

hello, I installed webstorm7 and pycharm3.02 in the same time, my os is mavericks. then i change both product files in  /Applications/<Product>.app/Contents/Info.plist to jvm 1.7,

and then webstorm started successfully,but pycharm still need jdk6 to start . why?

February 01, 2014 13:21
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Serge Baranov
JetBrains

Li Acerphoenix, most likely WebStorm 7 has a more recent java launcher stub version that doesn't require JDK 1.6 to run, PyCharm 3.0.2 is built from the older platform version which still requires JDK 1.6 to be present, even if you are running under JDK 1.7. This will be resolved in the future updates.

February 01, 2014 13:25
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Tony19

After editing the plist, make sure to resign the app bundle to avoid a nagging prompt and intermittent hangs at startup. Create a code-signing cert, and then run:

   sudo codesign --verbose --force --sign "<CERT COMMON NAME>" /Applications/WebStorm.app/

I verified this with Webstorm 7.0.3 on OS X Mavericks 10.9.2.

March 16, 2014 22:49