tomcat - their classes from previous runs are still loaded in memory

jsp, memory-leaks, servlets, tomcat

Solution

You can run `jmap -histo` which will show you loaded classes.

For example:

jmap -histo[:live] <pid>
    to connect to running process and print histogram of java object heap
    if the "live" suboption is specified, only count live objects

Example: jmap -dump:live,format=b,file=heap.bin <pid>

Another way is to enable classloading debug information and do some scripting to detect what is left loaded.

Problem

when stop my project , tomcat say : The following web applications were stopped (reloaded, undeployed), but their classes from previous runs are still loaded in memory, thus causing a memory leak (use a profiler to confirm) . Where we find that Which classes are left in memory ? please help me .

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