Seen this failure on multiple environments now:

$ CONF=linux-x86_64-server-fastdebug make test TEST=java/foreign/TestStubAllocFailure.java

[0.149s][warning][codecache] CodeCache is full. Compiler has been disabled.
[0.149s][warning][codecache] Try increasing the code cache size using -XX:ReservedCodeCacheSize=
CodeCache: size=3072Kb used=3071Kb max_used=3071Kb free=0Kb
 bounds [0x00007fb8b9548000, 0x00007fb8b9848000, 0x00007fb8b9848000]
 total_blobs=766 nmethods=24 adapters=655
 compilation: disabled (not enough contiguous free space left)
              stopped_count=1, restarted_count=0
 full_count=1
test TestStubAllocFailure.testUpcallAllocFailure(): failure
java.lang.AssertionError: expected [0] but found [1]
        at org.testng.Assert.fail(Assert.java:99)
        at org.testng.Assert.failNotEquals(Assert.java:1037)
        at org.testng.Assert.assertEqualsImpl(Assert.java:140)
        at org.testng.Assert.assertEquals(Assert.java:122)
        at org.testng.Assert.assertEquals(Assert.java:907)
        at org.testng.Assert.assertEquals(Assert.java:917)
        at UpcallTestHelper$Output.assertSuccess(UpcallTestHelper.java:52)
        at TestStubAllocFailure.testUpcallAllocFailure(TestStubAllocFailure.java:47)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
        at java.base/java.lang.reflect.Method.invoke(Method.java:580)
        at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:132)
        at org.testng.internal.TestInvoker.invokeMethod(TestInvoker.java:599)
        at org.testng.internal.TestInvoker.invokeTestMethod(TestInvoker.java:174)

===============================================
java/foreign/TestStubAllocFailure.java
Total tests run: 1, Passes: 0, Failures: 1, Skips: 0
===============================================

STDERR:
OpenJDK 64-Bit Server VM warning: CodeCache is full. Compiler has been disabled.
OpenJDK 64-Bit Server VM warning: Try increasing the code cache size using -XX:ReservedCodeCacheSize=
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.VirtualMachineError: Out of space in CodeCache for adapters
java.lang.Exception: failures: 1
        at com.sun.javatest.regtest.agent.TestNGRunner.main(TestNGRunner.java:104)
        at com.sun.javatest.regtest.agent.TestNGRunner.main(TestNGRunner.java:58)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
        at java.base/java.lang.reflect.Method.invoke(Method.java:580)
        at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
        at java.base/java.lang.Thread.run(Thread.java:1570)