Java：如何查找对特定类实例的所有引用

Question

I have a Java application where a specific object is the principal reason of RAM occupation, this is ok. Application logic has to drop this object instance and create a new one. I suspect old instance is kept alive by some reference.

Is there a way to list all references of a specific class instance using Eclipse debug or anything else?

Answer 1

Using Eclipse Memory Analyzer plugin (org.eclipse.mat.feature.feature.group):

• Run your application to the point where you suspect the memory leak
• Open the Memory Analysis perspective in Eclipse
• Click "Acquire Heap Dump" button in toolbar
  • Eclipse will need enough memory to process it, usually about the same amount as the application analyzed - you might need to change eclispe.ini to add more memory (if you don't have enough RAM you may instead create the memory dump using jvisualvm then close the app and start eclipse with increased -Xmx )
• Once the dump loads, you can browse it to identify the leak source (I don't recall details, but roughly - browse to your class, right click, view objects with incoming references)