This test case can be boiled down to the following: import The AsyncGetCallTrace API, used by async-profiler and others, has just one test case in the OpenJDK ( as I discussed before). A sample AsyncGetCallTraceTrace bugĪ problem that has been less discussed is the lacking test coverage of the underlying APIs. I would highly recommend you to read my Writing a profiler from scratch series If you want to know more about how the foundational AsyncGetCallTrace is used in profilers. Why JVM modern profilers are still safepoint biased?.How Inlined Code Makes For Confusing Profiles.There are several blog posts and talks covering the accuracy problems of profilers: Therefore you take the profiles generated by profilers with a grain of salt. Changes in seemingly unrelated parts of the enclosing project can adversely affect them.Tests could be more plentiful, especially for the underlying API, which could be tested well.Performance and accuracy could be better.But they are just software themself, interwoven with a reasonably large project, the OpenJDK (or OpenJ9, for that matter), and thus suffer from the same problems as the typical problems of application they are used to profile: There are many open-source profilers, most notably JFR/JMC, and async-profiler, that help you to find and fix performance problems. I’ll tell you some of their problems and a technique to cope with them in this blog post. You are receiving this because you were mentioned.Profilers are great tools in your toolbox, like debuggers, when solving problems with your Java application (I’ve been on a podcast on this topic recently). I don't need to set up Dockerfile these days so I forgot the things that I'm not so sure if you need to use ENV instead of RUN but you can try RUN export PATH=$PATH:$(dirname $(which wget)) The simplest solution might be putting the following line in your Wget and get the path and use it or add the path to the PATH env var? I think it's more likely that wget is not in the PATH. So I'm not sure if I'm the right one to ask but it looks like wget is not On Thu, at 8:08 AM Kevin Lee commented on this Is it CentOS? Sorry I Run jvisualvm which is located at $JAVA_HOME/bin. If you're using Docker Machine, use the IP of the machine. Docker for Mac uses Hyperkit instead of Docker Machine through VirtualBox so the host location can be just localhost rather than the IP of the Docker Machine.So it should be like ENTRYPOINT ["java -jar", "app.jar", The following options should be added to java executable command. VisualVM comes with the JDK so it doesn't require any extra installation or payment if JDK is already installed. Set the port number or use the default (i.e.Add the path to the JProfiler on the Docker where the jar file metioned above is using to the Remote installation directory.If Docker Machine is used, use the IP of the Docker Machine. Enter the remote address to the Remote address.To make JProfiler to wait for the application to start and send data, select Wait for a connection from the JProfiler GUI.Select the JVM used in the Docker instance.Select Linux X86/AMD64 for Platform of the remote computer on a remote computer.If the target application is running on any specific server listed, select it.Select ' Profile an application server, locally or remotely'."-agentpath:/usr/local/jprofiler9/bin/linux-圆4/libjprofilerti.so=port=8849"] So in the DockerFile, it looks like ENTRYPOINT ["java -jar","my-app.jar", JProfiler Run Application with JProfiler Agent java -jar my-app.jar -agentpath:/usr/local/jprofiler9/bin/linux-圆4/libjprofilerti.so=port=Į.g.) java -jar my-app.jar -agentpath:/usr/local/jprofiler9/bin/linux-圆4/libjprofilerti.so=port=8849 Tar -xzf /tmp/jprofiler_linux_9_2.tar.gz -C /usr/local
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