All Commands | arthas 1 of 3 https://arthas.aliyun.com/en/doc/commands.html HOME ONLINE TUTORIALS v4.0.5 DOCS COMMANDS DOWNLOAD VERSIONS DOCS Introduction All Commands Quick Start Install Arthas Download jvm - related Fundamental Fields in Expressions • dashboard - dashboard for the system's real-time data All Commands • heapdump - dump java heap in hprof binary format, like jmap • getstatic - examine class's static properties auth • jvm - show JVM information base64 • logger - print the logger information, update the logger level cat • mbean - show Mbean information classloader • memory - show JVM memory information cls • ognl - execute ognl expression dashboard • perfcounter - show JVM Perf Counter information dump • sysenv — view system environment variables echo • sysprop - view/modify system properties getstatic • thread - show java thread information grep • vmoption - view/modify the vm diagnostic options. heapdump • vmtool - jvm tool, getInstances in jvm, forceGc help history jad jfr jvm class/classloader - related • classloader - check the inheritance structure, urls, class loading info for the specified class; using classloader to get the url of the resource e.g. java/lang/String.class keymap • dump - dump the loaded classes in byte code to the specified location logger • jad - decompile the specified loaded classes mbean • mc - Memory compiler, compiles .java files into .class files in memory mc • redefine - load external *.class files and re-define it into JVM memory • retransform - load external *.class files and retransform it into JVM monitor • sc - check the info for the classes loaded by JVM ognl • sm - check methods info for the loaded classes options perfcounter profiler monitor/watch/trace - related pwd quit redefine reset retransform sc WARNING Attention: commands here are taking advantage of byte-code-injection, which means we are injecting some aspects into the current classes for monitoring and statistics purpose. Therefore, when using it for online troubleshooting in your production environment, you'd better explicitly specify classes/methods/criteria, session 9/2/25, 12:43 AM All Commands | arthas 2 of 3 https://arthas.aliyun.com/en/doc/commands.html HOME and remember to remove the injected code by stop or reset . ONLINE TUTORIALS v4.0.5 DOCS COMMANDS DOWNLOAD VERSIONS • monitor - monitor method execution statistics DOCS Introduction Quick Start Install Arthas • stack - display the stack trace for the specified class and method • trace - trace the execution time of specified method invocation • tt - time tunnel, record the arguments and returned value for the methods and replay • watch - display the input/output parameter, return object, and thrown exception of specified method invocation Download Fundamental Fields in Expressions All Commands auth base64 profiler/flame graph • profiler - use async-profiler to generate flame graph • jfr - dynamic opening and closing of jfr recordings cat classloader authentication cls dashboard • auth - authentication dump echo getstatic grep options • options - check/set Arthas global optionss heapdump help history jad jfr jvm pipe Arthas provides pipe to process the result returned from commands further, e.g. sm java.lang.String * | grep 'index' . Commands supported in pipe : keymap • grep- filter the result with the given keyword logger • plaintext - remove the ANSI color mbean • wc - count lines mc memory monitor ognl options async jobs async can be handy when a problem is hardly to reproduce in the production environment, e.g. one watch condition may happen only once in one single day. perfcounter profiler • job control - use > to redirect result into the log file, use & to put the job to the pwd background. Job keeps running even if the session is disconnected (the session quit lifecycle is 1 day by default) redefine • jobs - list all jobs reset • kill - forcibly terminate the job retransform • fg - bring the suspend job to the foreground sc • bg - put the job to run in the background session 9/2/25, 12:43 AM All Commands | arthas 3 of 3 https://arthas.aliyun.com/en/doc/commands.html HOME ONLINE TUTORIALS v4.0.5 DOCS DOCS COMMANDS DOWNLOAD VERSIONS Basic Arthas Commands Introduction • base64 - Encode and decode using Base64 representation. Quick Start • cat - Concatenate and print files Install Arthas • cls - clear the screen Download Fundamental Fields in Expressions All Commands auth base64 cat classloader cls dashboard dump echo • echo - write arguments to the standard output • grep - Pattern searcher • help - display Arthas help • history - view command history • keymap - keymap for Arthas keyboard shortcut • pwd - Return working directory name • quit/exit - exit the current Arthas session, without effecting other sessions • reset - reset all the enhanced classes. All enhanced classes will also be reset when Arthas server is closed by stop • session - display current session information • stop - terminate the Arthas server, all Arthas sessions will be destroyed • tee - Copies standard input to standard output, making a copy in zero or more files. • version - print the version for the Arthas attached to the current Java process getstatic grep heapdump help history jad jfr Edit this page on GitHub Last Updated: 8/25/2022, 3:33:49 AM Contributors: hengyunabc, Fatpandac, longxu0509, Arteev Raina, Hearen, LHearen, beiwei30 jvm keymap logger mbean mc memory monitor ognl options perfcounter profiler pwd quit redefine reset retransform sc session 9/2/25, 12:43 AM
