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When I have an issue with a C application, one of the first tools I reach for is strace, I can easily see e.g. if it is blocking on a read from a socket, or for some file I/O or whatever else. But this doesn't work on a Java application as the JVM is spinning away regardless of what the app is doing creating a lot of noise that makes strace output impossible to read. What is the equivalent tool in Java-land?

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I suggest using JConsole. It will give you more insight on what's going on inside your JAVA application/JVM.

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