Android Build error: NoClassDefFoundError: org/objectweb/asm/ClassVisitor

[Carlos Knippschild]

I updated and tried building Chrome for android and am getting many instances of this error, for different JAR files:

FAILED: obj/third_party/ub-uiautomator/ub_uiautomator_java__process_jar-asserted.jar 

python bin/helper/java_assertion_enabler ../../third_party/ub-uiautomator/lib/ub-uiautomator.jar obj/third_party/ub-uiautomator/ub_uiautomator_java__process_jar-asserted.jar

Error: A JNI error has occurred, please check your installation and try again

Exception in thread "main" java.lang.NoClassDefFoundError: org/objectweb/asm/ClassVisitor

        at java.lang.Class.getDeclaredMethods0(Native Method)

        at java.lang.Class.privateGetDeclaredMethods(Class.java:2703)

        at java.lang.Class.privateGetMethodRecursive(Class.java:3050)

        at java.lang.Class.getMethod0(Class.java:3020)

        at java.lang.Class.getMethod(Class.java:1786)

        at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:540)

        at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:522)

Caused by: java.lang.ClassNotFoundException: org.objectweb.asm.ClassVisitor

        at java.net.URLClassLoader.findClass(URLClassLoader.java:381)

        at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:332)

        at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

        ... 7 more

This seems related to AssertionEnabler.java as it is the only class that depends on ClassVisitor. Any idea on how to fix this?

[Andrew Grieve]

Looks like this was caused https://chromium-review.googlesource.com/c/544524, which I think is now reverted. It's made some of your gclient runhooks-downloaded jar files broken symlinks.

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[vita...@google.com]

For me just "gclient sync" did not help.

Fortunately, the following worked:

1) Delete .cipd folder in src/ (it was untracked for me)

2) gclient sync (it takes longer than usual)

3) Delete the folder where you compile to and recreate it again with gn.

The last step may be not necessary.

[Felix]

Proposed solution: gclient sync before  a4e8c9b8 (the culprit) or after 0a47fd18 (the revert), and run

find . -type l -ilname '*/.cipd/*' -delete ; gclient sync

Credits to tobiasjs@

To view this discussion on the web visit https://groups.google.com/a/chromium.org/d/msgid/chromium-dev/CABiQX1UBVONuCKNmxmi9%2BNUCmvCO71jjGXyoFaBqAsKd%3DYgSQg%40mail.gmail.com.

[Carlos Knippschild]

I deleted the .cipd/ folder, updated (git + gclient sync), started having errors with gn related to a safe browsing BUILD.gn file, waited some more hours... Updated again, then the Android build worked, finally!

All is well when it ends well, I guess. ;)