使用内存分析器在Java heapdump中查找打开的文件

Question

I have a java heapdump which I've opened in Memory Analyzer. Is there some way in memory analyzer (mat) to query for open file handles? I would like to identify exactly which class opened the file and holds an active reference to the file.

Answer 1

I've not done this (so open to flaming) but, I believe the yourkit file probe should be able to track open connections - in a running Java process.

As I say, not done it but I have done something similar with jdbc leaks and the database probe and it works on events (eg Tracks based on respective method calls). You should be able to see the stack trace where open and close occur (if it is akin to the database probe).

YourKit is a paid for app but you can trial it.

Answer 2

看一下File Leak Detector ，它是您附加到Java进程的Java代理。