Middleware Question:

Thread Dump: When we trigger a thread dump on a application
server,all active thread informations will be dumped into
file whichjis known as thread dump. here, we can get
information about thread like active thread,hung
thread,dead lock,runnable and inactive thread info.
Command : kill -3 PID(Process Id)

Heap Dump: It's snap shot of our JVM's heap memory,so here
we can have all active java objects and their activities
which object doing what and how much memory it is
accupying...