System.currentTimeMillis() cannot be mocked on IBM JDK ------------------------------------------------------ Key: ELY-1293 URL: https://issues.jboss.org/browse/ELY-1293 Project: WildFly Elytron Issue Type: Bug Reporter: Peter Palaga Assignee: Peter Palaga {{System.currentTimeMillis()}} is native in IBM JDK and at the same time, IBM JDK does not support java.lang.instrument API for native methods. Therefore, {{System.currentTimeMillis()}} cannot be mocked on IBM JDK using jmockit. {code} JAVA_HOME=path/to/ibm/java8 $JAVA_HOME/bin/java -version java version "1.8.0" Java(TM) SE Runtime Environment (build pxa6480sr3fp12-20160919_01(SR3 FP12)) IBM J9 VM (build 2.8, JRE 1.8.0 Linux amd64-64 Compressed References 20160915_318796 (JIT enabled, AOT enabled) J9VM - R28_Java8_SR3_20160915_0912_B318796 JIT - tr.r14.java.green_20160818_122998 GC - R28_Java8_SR3_20160915_0912_B318796_CMPRSS J9CL - 20160915_318796) JCL - 20160914_01 based on Oracle jdk8u101-b13 mvn clean test {code} Expected: the tests mocking {{System.currentTimeMillis()}} should pass Actual: the tests mocking {{System.currentTimeMillis()}} throw the following exception or similar: {code} java.lang.UnsupportedOperationException: class redefinition failed: attempted to change method modifiers at org.wildfly.security.audit.PeriodicRotatingFileAuditEndpointTest$1.<init>(PeriodicRotatingFileAuditEndpointTest.java:212) at org.wildfly.security.audit.PeriodicRotatingFileAuditEndpointTest.mockTime(PeriodicRotatingFileAuditEndpointTest.java:212) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.lang.reflect.Method.invoke(Method.java:508) at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:367) at org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:274) at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238) at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:161) at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:290) at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:242) at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:121) {code} This is the case with * PeriodicRotatingFileAuditEndpointTest * SizeRotatingFileAuditEndpointTest * GssapiCompatibilitySuiteChild