java.io.IOException: Unable to open sync connection! in to the Nexus

Question

I try my application run on eclipse but i found these errors. which is faced first time so would you please give me any ideas for these error. i am currently using Nexus mobile.

  [2011-08-04 15:59:09 - App] Android Launch!
  [2011-08-04 15:59:09 - App] adb is running normally.
  [2011-08-04 15:59:09 - App] Performing  com.horror.android.AppActivity     activity launch
  [2011-08-04 15:59:09 - App] Automatic Target Mode: using device 'HT9CRP800333'
  [2011-08-04 15:59:09 - App] Uploading Test.apk onto device 'HT9CRP800333'
  [2011-08-04 15:59:09 - App] Failed to install Test.apk on device 'HT9CRP800333': Unable to open sync connection!
  [2011-08-04 15:59:09 - App] java.io.IOException: Unable to open sync connection!
  [2011-08-04 15:59:09 - App] Launch canceled!

Why i am getting java.io.IOException: Unable to open sync connection! . Thanks in Advance.

if you want more solution about this problem clich this link: http://stackoverflow.com/questions/3912548/android-adb-unable-to-open-sync-connection — Horrorgoogle, Dec 23 '11 at 18:12

score 49 · Answer 1 · answered Sep 27 '11 at 09:47

49

get into Settings->Development->, and try disabling 'USB debugging' and enabling the same

answered Sep 27 '11 at 09:47

Prakhs

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this works well - is faster than rebooting! – benpage Nov 24 '11 at 22:42
Seems to be really the best solution. – fyr Feb 18 '12 at 14:22
[There's a nifty app that does this.](https://play.google.com/store/apps/details?id=com.pixplicity.adb) Unfortunately it requires root, but it's especially handy on my SGS2 since I have to unplug the cable, plug it in again, close the USB mount window and head through the menu a second time. – Paul Lammertsma Jul 13 '12 at 13:54

score 28 · Accepted Answer · answered Aug 04 '11 at 10:28

28

No it is not about your code. Try to plug usb out and than plag it in again. If it is not help try to reboot you device. Usually it works for me in such cases.

answered Aug 04 '11 at 10:28

Maxim

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I am still faced this problem. – Horrorgoogle Aug 04 '11 at 10:55
Here I found the same problem http://stackoverflow.com/questions/3912548/android-adb-unable-to-open-sync-connection – Maxim Aug 04 '11 at 11:05
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reboot zindabaad - thats hindi for "Long live reboot" :D – Akshat Jun 08 '12 at 12:05

Jared Burrows · Answer 3 · 2012-07-25T18:31:20.180

From Your Computer:

Try restarting ADB:

adb kill-server
adb start-server

For Linux(I have to do this on Ubuntu):

sudo -i (for root)
adb kill-server
adb start-server

Script I made in my '.bashrc':

alias fixadb="sudo sh -c '/path/to/adb kill-server'; sudo sh -c '/path/to/adb start-server';"

For Windows:

Ctrl + Alt + Del - Open Task Manager
Kill adb.exe
Right-click on adb.exe, Run as Administrator

USB Ports:

Try switching USB ports, this usually helps me every once in a while.

From your Phone:

Android SDK < 11:

Settings > Development > Try disabling and re-enabling 'USB debugging'

Android SDK > 11:

Settings > Developer Options > Try disabling and re-enabling 'Android debugging'

Try restarting your phone

java.io.IOException: Unable to open sync connection! in to the Nexus

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