IntelliJ Android cannot attach debugger

Question

Got a project recently converted to Gradle. Now I cannot debug the application.

I run the Debug Configuration - the app starts with a popup "Waiting for Debugger".

So I try to press the "Attach debugger to process"-button, select my process and nothing happens. Instead I get a

Unable to open debugger port java.net.connectexception "Operation Timed Out".

Anything obvious that I'm missing?

Are you trying to debug in the emulator or on a device?

Paul Nikonowicz
– Paul Nikonowicz

2015-10-19 21:01:43 +00:00
Commented Oct 19, 2015 at 21:01 — Paul Nikonowicz
– Paul Nikonowicz, Commented Oct 19, 2015 at 21:01
@PaulNikonowicz emulator

H.Rabiee
– H.Rabiee

2015-10-20 08:12:48 +00:00
Commented Oct 20, 2015 at 8:12 — H.Rabiee
– H.Rabiee, Commented Oct 20, 2015 at 8:12

H.Rabiee · Accepted Answer · 2015-11-10 11:56:15Z

2

On my part it was related to the internal networking. It seemed that

debugger <-> localhost connection couldn't be resolved. I was hinted by browsing through answers and executing lsof -i :8671 which was the debugger port for that session

idea    2244 username   41u  IPv4 0xe6ebe70eee4e0cd      0t0  TCP 192.168.1.74:54808->hajders:8617 (SYN_SENT)

As you can see the state was stuck SYN_SENT, which means the TCP connection could not be established. I added the following to my /etc/hosts file 127.0.0.1 hajders.

answered Nov 10, 2015 at 11:56

H.Rabiee

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