how to read a thread dump

Thread/daemon Thread,

• thread is discrete unit of concurrency managed by JVM
• daemon thread: runs independent of other threads, killed when Runtime.exit

Different state Threads

• Alive thread - A running thread taht is performance some work
• Blocked thread - attempt to enter synchronized block blocked by another thread
• Waiting Thread - waiting for another thread to call
• Sleep Thread - not executing because sleep is called