IntelliJ freezes for about 30 seconds before debugging

Question

when i try to debug my java app the IDE freezes for about 30 seconds with the message: "Finished, saving caches"

After it unfreezes all works fine. It happens every time.

When i only run (not debug) it does not freeze.

What i tried:

I changed the JDK on system.
I changed the IntelliJ version.
I change to IntelliJ Ultimate - trial.
Invalidating the IDE's cache.
Similar problem
I also figured out that the given message exists only it this area of code - github-project so i changed the JVM options to give InteliJ more ram.

InteliJ build IC-141.1010.3.

When i try to debug in other IDE's it works fine, only InteliJ gets stuck...

I submitted a ticket to jetbrains too, but i know the power of StackOverflow :)

I have a MacBookPro 2015 and JDK 1.8

The logs are stored in ~/.IntelliJIdea14/system/log/idea.log (there's a built-in log rotation). Seeing anything suspicious there? By reviewing it, you can also be sure which java it is using. (On Mac, the location is rather different). — Kedar Mhaswade, Jun 03 '15 at 20:05
The logs indicated that there was a hang within java.net.Inet4AddressImpl.getLocalHostName(Native Method). — Thomas, Jun 05 '15 at 20:29
Awesome thanks for the hint, @fane89, I had the issue with the hostname as well. http://stackoverflow.com/questions/1881546/inetaddress-getlocalhost-throws-unknownhostexception — FloWi, Sep 23 '16 at 12:45
The accepted answer is not the solution, the other answer is. http://stackoverflow.com/a/39971232/3679676 You can change the accepted answer to reflect this and help people out with the issue. — Jayson Minard, Apr 25 '17 at 10:27

score 97 · Accepted Answer · edited Apr 25 '17 at 10:32

97

If anyone else is still having this problem, I found this related issue on the IntelliJ board: https://youtrack.jetbrains.com/issue/IDEA-157303

It seems the problem is related to resolving hostnames. The recommended workaround is to include the following line in your /etc/hosts file:

127.0.0.1       localhost     <your hostname goes here>.local

And for IPv6 resolving, the same:

::1             localhost     <your hostname goes here>.local

edited Apr 25 '17 at 10:32

Jayson Minard

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answered Oct 11 '16 at 05:59

Shawn Lu

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awesome. that was easy. I don't know what changed. it was working just last night. – Martin Klosi Nov 26 '16 at 19:16
Wow, great answer - it's instant now. Much appreciated – phatduckk Dec 31 '16 at 06:36
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After about 2 years of just putting up with it - this answer sorted it for me on macOS 10.12.4 – Kong Apr 15 '17 at 23:01
Weird, that immediately fixed it—didn't even have to restart IntelliJ or computer. Thanks! – Ezekiel Victor Jun 25 '17 at 18:14
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Just upgraded to macOS High Sierra. This still applies. Writing "hostname" in terminal gived you the hostname, and you can just add tab + your "hostname".local to the existing lines. – Peheje Oct 08 '17 at 22:16
After months of suffering from this freeze, finally everything is back to normal on Mojave – Munish Chandel Nov 07 '18 at 07:43
I fixed by adding `127.0.0.1 ` without .local which fixed the problem – Santosh Hegde Sep 11 '19 at 18:19

score 26 · Answer 2 · answered Aug 30 '17 at 23:57

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Well, the issue took me around 3 hours to find out how to overcome it. For anyone has tried "modifying etc host file" solution from Jayson Minard and still not worked. Just go to SystemPreference -> Sharing and turn on File Sharing. That's on and it will let you debug your Java app on IntelijIdea 2017 very very very fast !!!!!!

answered Aug 30 '17 at 23:57

danhnn.uit

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This also worked for me. I wonder what this does behind the scenes for IntelliJ to launch debugging faster. – BrandonKowalski Oct 21 '17 at 02:57
where is this option in windows 10? – Gaurav Jan 30 '19 at 09:39
dude, I logged in just write a 'thank you' comment. Take my upvote. – lynxx Apr 10 '19 at 05:24
This made a very big difference. How did you figure this out? – Koray Tugay Feb 28 '23 at 02:13

score 8 · Answer 3 · edited May 23 '17 at 11:47

The support from IntelliJ told me to try the IDE with bundled java.

http://download.jetbrains.com/idea/ideaIC-14.1.3-custom-jdk-bundled.dmg

And it works!

Edit:

IntelliJ support feedback: The problem was that there was a hang within java.net.Inet4AddressImpl.getLocalHostName(Native Method) JDK method call, which gets your system hostname. This is either JDK problem or local configuration issue...

The solution for this is here.

IntelliJ freezes for about 30 seconds before debugging

3 Answers3

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