I am trying to run btrace v.1.3 (20150516) using Java 1.8 on Windows 7 Enterprise and having many issues.
In my btrace script I am creating an Aggregation using:
private static Aggregation methodDuration = Aggregations
.newAggregation(AggregationFunction.AVERAGE);
The aggregation creation is failing silently and subsequent calls are throwing a NullPointerException trying to access it.
I am having almost the same issue when I run the stock Profiling example https://github.com/jbachorik/btrace/blob/master/samples/Profiling.java
This time however I am getting an error message: BTraceScript.java:131:instance variables are not allowed.
My btrace code for that example looks like this
@BTrace
public class BTraceScript {
. . .
131 @Property
132 Profiler profiler = BTraceUtils.Profiling.newProfiler();
133
134 @OnMethod(clazz="com.vgrazi.btrace.SynchronizationExample", method="/.*/")
135 void entry(@ProbeMethodName(fqn=true) String probeMethod) {
136 BTraceUtils.Profiling.recordEntry(profiler, probeMethod);
137 }
FYI, I am also trying on Mac also using Java 8, and although it gets slightly further, it is still not really behaving properly.
This is caused by https://github.com/jbachorik/btrace/issues/129
Please, use the latest BTrace (1.3.3 at the time)