- #Jprofiler tutorial tomcat code#
- #Jprofiler tutorial tomcat Offline#
- #Jprofiler tutorial tomcat free#
- #Jprofiler tutorial tomcat windows#
If we see a plateau, it means the garbage collector can’t free up any. If the saw teeth become too frequent, it means that a lot of objects are being created and the garbage collector is called often to reclaim the memory. You can see an example of this in the picture below: Usually, the memory usage curve is saw-shaped: the chart goes up when new objects are allocated and periodically goes down when the memory is reclaimed by the garbage collector. This is precisely the moment when the animation hangs, and there seems to be no way out of this. Indeed, we see that the memory usage is going up continually before reaching a plateau. Right-click the necessary process in the Profiler tool window and select CPU and Memory Live Charts.Ī new tab opens in which you can see the amount of resources the selected process consumes.
#Jprofiler tutorial tomcat windows#
Open CPU and memory live chartsįrom the main menu, select View | Tool Windows | Profiler. Let’s open the charts for our parrot app and see if we can spot anything when the animation freezes. They allow us to visualize real-time resources usage for the processes that are running. Since we are getting an OutOfMemoryError, a good starting point for analysis is CPU and Memory Live Charts. Clearly, we need to try another approach. We don’t even know if the threads are waiting for a lock or have just finished their current work. Unfortunately, this did not tell us much because all the threads involved in the parrot party are in the waiting state. We get the list of threads with their current stack traces. From the main menu, select Run | Debugging Actions | Pause Program. Let’s try using the debugger! Pause an appįirst we need to run the app in debug mode. The result may differ on other JVMs or even on Corretto 11 if it uses a custom configuration. The interesting thing about the animation freeze is that we can still use the rest of the UI. There is no reliable way of telling how exactly the problem will manifest itself. There can also be a OutOfMemoryError, whose stack trace doesn’t tell us anything about the origin of the problem. However, it’s not long before things start going wrong.Īfter working for some time, the animation freezes with no indication of what the cause is. The app seems to work well: you can tweak the animation color and speed. Īfter that, launch the application using the Parrot run configuration included with the project. Let’s start with cloning the following repository. Most of the tools in this tutorial are available in Community Edition, but for profiling tools you need Ultimate. In this tutorial, we’ll look at how we can use some of IntelliJ IDEA's built-in tools to investigate a runtime problem. They can point you in the right direction. A smarter approach would be to use the tools you have at hand.
#Jprofiler tutorial tomcat code#
Does anything else need to be configured besides the jprofiler.We often find ourselves in situations where code is not working properly, and we have no idea where to even begin investigating.Ĭan’t we just stare at the code until the solution eventually comes to us? Sure, but this method probably won’t work without deep knowledge of the project and a lot of mental effort. I also connected to the JVM with JConsole and did not see any com.jprofiler MBeans registered. If the remote computer is only reachable via an IP address, please add
No connection to an MBean server at XXXXXXXXXXXX:5555 could be made Here is the output: Connecting to XXXXXXXXXXXX:5555. Unfortunately when I run jpcontroller it is not able to connect to the MBean server. Jvm 1 | INFO: Initialization processed in 974 msīased on the docs I assumed that the jprofiler.jmxPasswordFile argument is optional, so I disregarded the message pertaining to authentication for the JMX server. Jvm 1 | JProfiler> Pass -Djprofiler.jmxPasswordFile= to set up authentication Jvm 1 | JProfiler> WARNING: No authentication for JMX server specified. Jvm 1 | Copyright 1999-2006 Tanuki Software, Inc. Jvm 1 | JProfiler> Hotspot compiler enabled Jvm 1 | JProfiler> Time measurement: elapsed time Jvm 1 | JProfiler> Native library initialized Jvm 1 | JProfiler> Can retransform any class. Jvm 1 | JProfiler> Can retransform classes. Jvm 1 | JProfiler> Instrumenting native methods. Jvm 1 | JProfiler> Listening on port: 8849. Jvm 1 | JProfiler> Using config file C:\XXXXX\XXXXXX\.jprofiler7\config.xml (id: 121)
#Jprofiler tutorial tomcat Offline#
Jvm 1 | JProfiler> Offline profiling mode. Jvm 1 | JProfiler> JVMTI version 1.1 detected. Here is the tcServer \ Tomcat startup output: wrapper | -> Wrapper Started as Console I've addded the following arguments to my tcServer \ Tomcat startup config: .10="-agentpath:C:\PROGRA~1\JPROFI~1\bin\WINDOW~1\jprofilerti.dll=offline,id=121" I'm trying to use jpcontroller to connect to a local app, but I'm getting an error message that it cannot connect to the MBean server.
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