How can I resolve "adb server is out of date" error

Question

I understand that this question has been asked 1000 times but every answer I can find on Stackoverflow and other websites are all the same: Either (1) The user is using Genymotion, (2) the user is using HTC Sync in Windows.

I am doing neither. I am currently running in OS/X (10.11.6) and am using a Moto X (2nd gen) phone running Android 6.0.

Many times (not every time) when I run "adb logcat", I get

adb server is out of date.  killing...
* daemon started successfully *

This is a problem because I am trying to run some automated tests using gradlew (since using "adb shell am instrument" doesn't produce the JUnit style report I need) and collect logs... but every time I start "adb logcat", something in gradlew (apparently) tries to startup adb, which then kills all running instances of adb.

Has anyone seen this problem without using Genymotion/HTCSync/Windows and knows a solution?

Thanks!

Answer 1

What cause the error is your computer's adb version is inconsistent with your android sdk's adb version!!!

First,if you use windows,open cmd and input where adb,

Second,replace it with your android sdk's adb,

Finally,you get it success.

Answer 2

Please check all your environmental paths which ADB has. Your system may have several ADB.exe files so that mismatches makes the issue.

Answer 3

The root cause of the server is out of date issue is still the same regardless the OS and/or other software used - you have multiple copies of adb binary in your system. And the solution is also the same:

• kill all running adb processes
• make sure you have the only copy of adb (remove the duplicates)
• update it to the latest version
• reconfigure all your software packages to use that copy

Answer 4

Just check that every tool you use is using the same adb version. For example, delete all versions except the latest.