When i click on instrumentation tab for the project attached with Glowroot agent. I get the following exception on the back end. Even the front end UI also shows the same stack trace. This is happening only for those projects where we are using Drools engine and others are working fine. Due to corporate security restriction I am only putting generic stack trace and not all. Please let me know if this is useful to diagnose problem.

The project is spring-boot (version 1.5.1 )based and Drools version is 6.4 and even with 7.1 I get same error.

java.lang.RuntimeException: Unable to get bytes for: \XXXX\XXXX\XXXXXX\target\classes
at org.drools.compiler.kie.builder.impl.FileKieModule.getBytes(FileKieModule.java:66)
at org.drools.compiler.kie.builder.impl.AbstractKieModule.hasResource(AbstractKieModule.java:346)
at org.drools.compiler.kie.builder.impl.AbstractKieModule$KieModuleResourceProvider.getResource(AbstractKieModule.java:552)
at org.drools.core.common.ProjectClassLoader.getResources(ProjectClassLoader.java:285)
at java.lang.ClassLoader.getResources(ClassLoader.java:1138)
at org.glowroot.agent.live.ClasspathCache.getURLs(ClasspathCache.java:321)
at org.glowroot.agent.live.ClasspathCache.updateCache(ClasspathCache.java:265)
at org.glowroot.agent.live.ClasspathCache.updateCache(ClasspathCache.java:164)
at org.glowroot.agent.live.ClasspathCache.getMatchingClassNames(ClasspathCache.java:99)
at org.glowroot.agent.live.LiveWeavingServiceImpl.getMatchingClassNames(LiveWeavingServiceImpl.java:99)
at org.glowroot.agent.shaded.glowroot.ui.InstrumentationConfigJsonService.getMatchingClassNames(InstrumentationConfigJsonService.java:147)
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:498)
at org.glowroot.agent.shaded.glowroot.ui.CommonHandler.callMethod(CommonHandler.java:550)
at org.glowroot.agent.shaded.glowroot.ui.CommonHandler.handleJsonServiceMappings(CommonHandler.java:294)
at org.glowroot.agent.shaded.glowroot.ui.CommonHandler.handleRequest(CommonHandler.java:211)
at org.glowroot.agent.shaded.glowroot.ui.CommonHandler.handle(CommonHandler.java:160)
at org.glowroot.agent.shaded.glowroot.ui.HttpServerHandler.channelRead(HttpServerHandler.java:128)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
at org.glowroot.agent.shaded.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
at org.glowroot.agent.shaded.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102)
at org.glowroot.agent.shaded.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
at org.glowroot.agent.shaded.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
at org.glowroot.agent.shaded.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:438)
at org.glowroot.agent.shaded.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:310)
at org.glowroot.agent.shaded.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:284)
at org.glowroot.agent.shaded.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:253)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
at org.glowroot.agent.shaded.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
at org.glowroot.agent.shaded.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
at org.glowroot.agent.shaded.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926)
at org.glowroot.agent.shaded.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:134)
at org.glowroot.agent.shaded.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:644)
at org.glowroot.agent.shaded.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:579)
at org.glowroot.agent.shaded.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:496)
at org.glowroot.agent.shaded.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:458)
at org.glowroot.agent.shaded.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858)
at java.lang.Thread.run(Thread.java:745)

Regards
Saurabh