I was running all the runtime/cds/appcds/dynamicArchive tests and had an unexpected and strange failure in LambdaProxyDuringShutdown.java:

java.lang.RuntimeException: 'class.load.*Outer[$]Inner[$][$]Lambda.*0x.*source:.Outer' missing from stdout/stderr

When I examined the log there was no sign that the installed shutdown hook had executed, causing the Outer and Inner classes to be loaded. After much experimentation and head scratching I did observe some unexpected output:

shut down hook invoked...

Searching the sources this comes from:

class MyShutdown extends Thread{
    public void run(){
        System.out.println("shut down hook invoked...");
    }
}

in class LinkClassApp - which is a different test! The problem is that LambdaProxyDuringShutdownApp also has this:

class MyShutdown extends Thread {
    public void run() {
        Outer.Inner inner = new Outer.Inner();
    }
}

and it became evident that when running the tests locally, under the right/wrong conditions the LambdaProxy test was using the LinkClass test's MyShutdown class. Sure enough this class gets compiled into:

JTwork/classes/test/hotspot/jtreg/runtime/cds/appcds/dynamicArchive/test-classes

which is shared by both tests.

Simple fix is to rename one of the classes so there is no duplication.