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java – Android Device Monitor not opening

Posted by: admin June 15, 2020 Leave a comment


I am unable to run Android Monitor. I am using Android Studio. Not Eclipse.

  • When I attempt to open it in the terminal using sudo ./monitor, I see the following warning, then it shows

WARNING: An illegal reflective access operation has occurred WARNING:
Illegal reflective access by
to method java.net.URLClassLoader.addURL(java.net.URL) WARNING: Please
consider reporting this to the maintainers of
org.eclipse.osgi.internal.baseadaptor.BaseStorage WARNING: Use
–illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be
denied in a future release

  • I have Java version 9, as well has Javac 9
  • I have installed the latest version of JDK or JRE

Here is the tag I see every time I try to open Android Device Monitor

!ENTRY org.eclipse.osgi 4 0 2017-10-04 20:18:12.531 !MESSAGE
Application error !STACK 1 java.lang.IllegalStateException: Unable to
acquire application service. Ensure that the org.eclipse.core.runtime
bundle is resolved and started (see config.ini). at
Method) at
at java.base/java.lang.reflect.Method.invoke(Method.java:564) at
org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629) at
org.eclipse.equinox.launcher.Main.basicRun(Main.java:584) at

Any help would be greatly appreciated!

How to&Answers:

Android Studio does not support Java 9 yet.
Install JDK 8 and update your studio configurations to point the jre for 8.

Then ensure that you are not setting your JAVA_HOME to 9 yet either.
Lastly, make sure you eclipse is not running somewhere on your machine taking ownership of the ADB already.


Newest Android Studio Bundle comes with its own JRE (under <ANDROID_STUDIO>/jre and this is the recommended JRE to work with (look at File / Project Structure / SDK Location).

Likewise, a simple option is to create a symbolic link under the monitor tools to keep JRE in line with Android Studio even getting an update.

For MAC or Linux:

#ln -s <ANDROID_STUDIO>/jre <SDK>/tools/lib/monitor-x86_64/jre

32 bits:

#ln -s <ANDROID_STUDIO>/jre <SDK>/tools/lib/monitor-x86/jre

Then the ddms monitor works for both ways: from Studio IDE (Tools / Android / ADM) or command line (<SDK>tools/./monitor)


Yes, The Newest Android Studio Bundle comes with its own JRE (under C:\Program Files\Android\Android Studio\jre).

So, You can just copy this jre folder and paste it to here:

And now in android studio go to the Tools -> Android -> Android Device Monitor.

Or you can prefer this link Resolve Android Device Monitor issue


You modify Info.plist file in monitor binary directory.

Path example in Mac: 

Add -vm key of bundled java path into <key>Eclipse</key><array>.(There is a comment.You read it.)

-vm key example



Not sure what is your use case for Android Device Monitor, but apparently since Android Studio 3.0. most components of the Android Device Monitor are deprecated:


There are other tools that can be used such as Android Profiler…

So maybe it is not really necessary to try to fix this issue.