https://dzone.com/articles/how-to-read-a-thread-dump https://d2.naver.com/helloworld/10963 자주 쓰는 명령 jps -v more dum.txt | grep locked | sort -i | uniq -c | sort -i : 같은 객체에 lock이 걸린것이 있는지 확인 도구 TDA : https://java.net/projects/tda Thread Logic : https://java.net/projects/threadlogic IBM Thread and Monitor Dump Analyzer for Java : https://www.ibm.com/developerworks/mydeveloperworks/groups/service/html/communityview?communityUuid=2245aa39-fa5c-4475-b891-14c205f7333c