操作步驟
-
上傳arthas工具包
rz -bey -
解壓arthas包
tar -zxvf arthas3.5.3.tar -
進入 arthas-bin目錄
cd arthas-bin/ -
啓動arthas
[work(leiting04)@tjtx167-79-50 arthas-bin]$ ./as.sh Arthas script version: 3.5.3 [INFO] JAVA_HOME: /opt/soft/jdk/jdk1.8.0_231 Found existing java process, please choose one and input the serial number of the process, eg : 1. Then hit ENTER. * [1]: 1321 com.bj58.spat.scf.server.bootstrap.Main [2]: 1021 lib/magici-agent-1.0-SNAPSHOT.jar -
選擇需要調試的進程
1 Arthas home: /home/work/arthas-bin Calculating attach execution time... Attaching to 1321 using version /home/work/arthas-bin... real 0m3.229s user 0m0.270s sys 0m0.047s Attach success. telnet connecting to arthas server... current timestamp is 1640051602 Trying 127.0.0.1... Connected to 127.0.0.1. Escape character is '^]'. ,---. ,------. ,--------.,--. ,--. ,---. ,---. / O \ | .--. ''--. .--'| '--' | / O \ ' .-' | .-. || '--'.' | | | .--. || .-. |`. `-. | | | || |\ \ | | | | | || | | |.-' | `--' `--'`--' '--' `--' `--' `--'`--' `--'`-----' wiki https://arthas.aliyun.com/doc tutorials https://arthas.aliyun.com/doc/arthas-tutorials.html version 3.5.3 main_class pid 1321 time 2021-12-21 09:53:21 [arthas@1321]$ -
查看命令
[arthas@1321]$ help NAME DESCRIPTION help Display Arthas Help auth Authenticates the current session keymap Display all the available keymap for the specified connection. sc Search all the classes loaded by JVM sm Search the method of classes loaded by JVM classloader Show classloader info jad Decompile class getstatic Show the static field of a class monitor Monitor method execution statistics, e.g. total/success/failure count, average rt, fail rate, etc. stack Display the stack trace for the specified class and method thread Display thread info, thread stack trace Trace the execution time of specified method invocation. watch Display the input/output parameter, return object, and thrown exception of specified method invocation tt Time Tunnel jvm Display the target JVM information perfcounter Display the perf counter information. ognl Execute ognl expression. mc Memory compiler, compiles java files into bytecode and class files in memory. redefine Redefine classes. @see Instrumentation#redefineClasses(ClassDefinition...) retransform Retransform classes. @see Instrumentation#retransformClasses(Class...) dashboard Overview of target jvm's thread, memory, gc, vm, tomcat info. dump Dump class byte array from JVM heapdump Heap dump options View and change various Arthas options cls Clear the screen reset Reset all the enhanced classes version Display Arthas version session Display current session information sysprop Display, and change the system properties. sysenv Display the system env. vmoption Display, and update the vm diagnostic options. logger Print logger info, and update the logger level history Display command history cat Concatenate and print files base64 Encode and decode using Base64 representation echo write arguments to the standard output pwd Return working directory name mbean Display the mbean information grep grep command for pipes. tee tee command for pipes. profiler Async Profiler. https://github.com/jvm-profiling-tools/async-profiler vmtool jvm tool stop Stop/Shutdown Arthas server and exit the console. -
退出
[arthas@1321]$ stop Resetting all enhanced classes ... Affect(class count: 0 , method count: 0) cost in 1 ms, listenerId: 0 Arthas Server is going to shutdown... [arthas@1321]$ session (d43cf81c-f1ee-4d79-a373-28c3e47188a6) is closed because server is going to shutdown. Connection closed by foreign host. [work(leiting04)@tjtx167-79-50 arthas-bin]$
小技巧
- arthas的默認端口是3658,假設arthas進程已經存在，需要重新進入命令端，可以使用telnet命令
[work(leiting04)@tjtx167-79-50 ~]$ telnet 127.0.0.1 3658
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
,---. ,------. ,--------.,--. ,--. ,---. ,---.
/ O \ | .--. ''--. .--'| '--' | / O \ ' .-'
| .-. || '--'.' | | | .--. || .-. |`. `-.
| | | || |\ \ | | | | | || | | |.-' |
`--' `--'`--' '--' `--' `--' `--'`--' `--'`-----'
wiki https://arthas.aliyun.com/doc
tutorials https://arthas.aliyun.com/doc/arthas-tutorials.html
version 3.5.3
main_class
pid 1321
time 2021-12-21 10:43:46
[arthas@1321]$
- 默認情況下在啓動arthas的過程中是需要選擇進程的，但如果已經知道進程名，則在啓動時可以加啓動參數，指定進程,具體流程如下
比如，通過JPS命令，查看進程
[work(leiting04)@tjtx167-79-50 ~]$ jps
415746 Jps
1321 Main
1021 magici-agent-1.0-SNAPSHOT.jar
[work(leiting04)@tjtx167-79-50 ~]$
本次需要調試的進程是 1321 Main,則可以在啓動參數中直接指定
[work(leiting04)@tjtx167-79-50 arthas-bin]$ ./as.sh --select Main
Arthas script version: 3.5.3
[INFO] JAVA_HOME: /opt/soft/jdk/jdk1.8.0_231
Arthas home: /home/work/arthas-bin
Calculating attach execution time...
Attaching to 1321 using version /home/work/arthas-bin...
real 0m3.118s
user 0m0.286s
sys 0m0.035s
Attach success.
telnet connecting to arthas server... current timestamp is 1640067233
Trying 127.0.0.1...
Connected to 127.0.0.1.
Escape character is '^]'.
,---. ,------. ,--------.,--. ,--. ,---. ,---.
/ O \ | .--. ''--. .--'| '--' | / O \ ' .-'
| .-. || '--'.' | | | .--. || .-. |`. `-.
| | | || |\ \ | | | | | || | | |.-' |
`--' `--'`--' '--' `--' `--' `--'`--' `--'`-----'
wiki https://arthas.aliyun.com/doc
tutorials https://arthas.aliyun.com/doc/arthas-tutorials.html
version 3.5.3
main_class
pid 1321
time 2021-12-21 14:13:52
[arthas@1321]$