Servertools local build failing with very strange errors -------------------------------------------------------- Key: JBIDE-19881 URL: https://issues.jboss.org/browse/JBIDE-19881 Project: Tools (JBoss Tools) Issue Type: Bug Components: build, server Reporter: Rob Stryker Assignee: Mickael Istria Priority: Blocker Fix For: 4.3.0.Beta1 So I tried to run my servertools build while making a patch for https://issues.jboss.org/browse/JBIDE-19801 And I started getting very very weird errors: http://fpaste.org/226368/32788687/ Nick instructed me to check if my build was using Java8, and it wasn't. Somehow it was still using java7. So next, I export JAVA_HOME to a java8 installation, and I get a newer weirder error: {code} Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0 Exception in thread "main" java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:386) at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:401) Caused by: java.lang.RuntimeException: Class java/util/UUID could not be instrumented. at org.jacoco.agent.rt_6l8m50.core.runtime.ModifiedSystemClassRuntime.createFor(ModifiedSystemClassRuntime.java:138) at org.jacoco.agent.rt_6l8m50.core.runtime.ModifiedSystemClassRuntime.createFor(ModifiedSystemClassRuntime.java:99) at org.jacoco.agent.rt_6l8m50.JacocoAgent.createRuntime(JacocoAgent.java:128) at org.jacoco.agent.rt_6l8m50.JacocoAgent.init(JacocoAgent.java:74) at org.jacoco.agent.rt_6l8m50.JacocoAgent.premain(JacocoAgent.java:165) ... 6 more Caused by: java.lang.NoSuchFieldException: $jacocoAccess at java.lang.Class.getField(Class.java:1690) at org.jacoco.agent.rt_6l8m50.core.runtime.ModifiedSystemClassRuntime.createFor(ModifiedSystemClassRuntime.java:136) ... 10 more FATAL ERROR in native method: processing of -javaagent failed {code} I come to find out that the jacoco we're using is org.jacoco.agent/0.6.1.201212231917. This was released, obviously by timestamp, in 2012. I find https://github.com/jacoco/jacoco/issues/74 which was a bug fixed in 2013, after our current jacoco. So if we must now run with java8, then clearly we need a newer jacoco. Either way, it seems that either my machine is very messed up, or there's a lot of weird stuff changing on build side that's not matching each other. No idea how to fix either bug ;)