MemoryUtil's static constructor call to ManagementFactory.getMemoryPoolMXBeans() fails on Google App Engine ----------------------------------------------------------------------------------------------------------- Key: DROOLS-1193 URL: https://issues.jboss.org/browse/DROOLS-1193 Project: Drools Issue Type: Bug Components: core engine Affects Versions: 6.4.0.Final Reporter: Geoffrey De Smet Assignee: Mario Fusco {code} [INFO] java.lang.NoClassDefFoundError: java.lang.management.ManagementFactory is a restricted class. Please see the Google App Engine developer's guide for more details. [INFO] at com.google.appengine.tools.development.agent.runtime.Runtime.reject(Runtime.java:52) [INFO] at org.drools.core.util.MemoryUtil.<clinit>(MemoryUtil.java:33) [INFO] at java.lang.Class.forName0(Native Method) [INFO] at java.lang.Class.forName(Class.java:195) [INFO] at com.google.appengine.tools.development.agent.runtime.RuntimeHelper.checkRestricted(RuntimeHelper.java:70) [INFO] at com.google.appengine.tools.development.agent.runtime.Runtime.checkRestricted(Runtime.java:65) [INFO] at org.drools.core.RuleBaseConfiguration.setPermGenThreshold(RuleBaseConfiguration.java:583) [INFO] at org.drools.core.RuleBaseConfiguration.init(RuleBaseConfiguration.java:451) [INFO] at org.drools.core.RuleBaseConfiguration.init(RuleBaseConfiguration.java:429) [INFO] at org.drools.core.RuleBaseConfiguration.<init>(RuleBaseConfiguration.java:278) [INFO] at org.drools.compiler.kie.builder.impl.KieServicesImpl.newKieBaseConfiguration(KieServicesImpl.java:185) {code} the problem is in this code: {code} static { if (!hasPermGen() || ClassUtils.isAndroid()) { // hasPermGen is true because GAE doesn't support java 8 yet permGenStats = new DummyMemoryStats(); } else { MemoryPoolMXBean permGenBean = null; for (MemoryPoolMXBean mx : ManagementFactory.getMemoryPoolMXBeans()) { // <=== EXCEPTION if (mx.getName() != null && mx.getName().contains("Perm")) { permGenBean = mx; break; } } permGenStats = new MBeanMemoryStats(permGenBean); } } {code}