title: adb server version (39) doesn't match this client (40); killing... ADB server didn't ACK
body: <pre><code>I am developing sample application and installation procedure followed 
  as followed react-native document and installed this application but 
  ios  wokring fine and coming to android getting this issue.
  </code></pre>
  
  <p>adb server version (39) doesn't match this client (40); killing...
      ADB server didn't ACK
      Full server startup log: /var/folders/df/3drfx_117t1g7d97fxd86j_w0000gn/T//adb.501.log
      Server had pid: 14441
      --- adb starting (pid 14441) ---
      adb I 10-30 20:55:55 14441 194054 main.cpp:56] Android Debug Bridge version 1.0.40
      adb I 10-30 20:55:55 14441 194054 main.cpp:56] Version 4986621
      adb I 10-30 20:55:55 14441 194054 main.cpp:56] Installed as /usr/local/bin/adb
      adb I 10-30 20:55:55 14441 194054 main.cpp:56] 
      --- adb starting (pid 14443) ---
      adb I 10-30 20:55:55 14443 194061 main.cpp:57] Android Debug Bridge version 1.0.39
      adb I 10-30 20:55:55 14443 194061 main.cpp:57] Version 0.0.1-4500957
      adb I 10-30 20:55:55 14443 194061 main.cpp:57] Installed as /Users/praveen/Library/Android/sdk/platform-tools/adb
      adb I 10-30 20:55:55 14443 194061 main.cpp:57] 
      adb I 10-30 20:55:56 14441 194054 auth.cpp:421] adb_auth_init...
      adb I 10-30 20:55:56 14441 194054 auth.cpp:174] read_key_file '/Users/praveen/.android/adbkey'...
      error: could not install <em>smartsocket</em> listener: Address already in use
      adb server killed by remote request</p>
  
  <pre><code>* failed to start daemon
  error: cannot connect to daemon
  Starting the app (/Users/praveen/Library/Android/sdk/platform-tools/adb shell am start -n com.awesomeproject/com.awesomeproject.MainActivity...
  * daemon not running; starting now at tcp:5037
  ADB server didn't ACK
  Full server startup log: /var/folders/df/3drfx_117t1g7d97fxd86j_w0000gn/T//adb.501.log
  Server had pid: 14447
  --- adb starting (pid 14447) ---
  adb I 10-30 20:55:57 14447 194321 main.cpp:57] Android Debug Bridge version 1.0.39
  adb I 10-30 20:55:57 14447 194321 main.cpp:57] Version 0.0.1-4500957
  adb I 10-30 20:55:57 14447 194321 main.cpp:57] Installed as /Users/praveen/Library/Android/sdk/platform-tools/adb
  adb I 10-30 20:55:57 14447 194321 main.cpp:57] 
  adb I 10-30 20:55:57 14445 194315 adb_auth_host.cpp:416] adb_auth_init...
  adb I 10-30 20:55:57 14445 194315 adb_auth_host.cpp:174] read_key_file '/Users/praveen/.android/adbkey'...
  error: could not install *smartsocket* listener: Address already in use
  
  * failed to start daemon
  error: cannot connect to daemon
  Srikanth:AwesomeProject Srikanth$ 
  </code></pre>
  
  <p>Please help me this  This is not run at this emulator ! <em>emphasized text</em></p>