Arthas热编译

原创已于 2024-11-25 21:05:08 修改 · 399 阅读
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#java #jvm
于 2024-11-25 20:59:58 首次发布
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wiki       https://arthas.aliyun.com/doc                                        
tutorials  https://arthas.aliyun.com/doc/arthas-tutorials.html                  
version    4.0.4                                                                
main_class                                                                      
pid        1725                                                                 
time       2024-11-25 20:22:13.034                                              

[arthas@1725]$ 1725
java.lang.IllegalArgumentException: 1725: command not found
[arthas@1725]$ sc -d LoginController.class grep classLoaderHash
Affect(row-cnt:0) cost in 42 ms.
[arthas@1725]$ sc -d Login* grep classLoaderHash
Affect(row-cnt:0) cost in 6 ms.
[arthas@1725]$ sc -d *LoginController grep classLoaderHash
 class-info        xxx.controller.LoginController                                                                                    
 code-source       file:/home/armin/promise-1.0-SNAPSHOT.jar!/BOOT-INF/classes!/                                                                   
 name              xxx.controller.LoginController                                                                                    
 isInterface       false                                                                                                                           
 isAnnotation      false                                                                                                                           
 isEnum            false                                                                                                                           
 isAnonymousClass  false                                                                                                                           
 isArray           false                                                                                                                           
 isLocalClass      false                                                                                                                           
 isMemberClass     false                                                                                                                           
 isPrimitive       false                                                                                                                           
 isSynthetic       false                                                                                                                           
 simple-name       LoginController                                                                                                                 
 modifier          public                                                                                                                          
 annotation        org.springframework.web.bind.annotation.RestController,org.springframework.web.bind.annotation.RequestMapping                   
 interfaces                                                                                                                                        
 super-class       +-java.lang.Object                                                                                                              
 class-loader      +-org.springframework.boot.loader.LaunchedURLClassLoader@96532d6                                                                
                     +-sun.misc.Launcher$AppClassLoader@3581c5f3                                                                                   
                       +-sun.misc.Launcher$ExtClassLoader@5f341870                                                                                 
 classLoaderHash   96532d6                                                                                                                         

Affect(row-cnt:1) cost in 57 ms.
[arthas@1725]$ redefine -c 96532d6 /home/LoginController.class 
redefine error! java.lang.UnsupportedOperationException: class redefinition failed: attempted to change the schema (add/remove fields)
[arthas@1725]$ 
[arthas@1725]$ redefine -c 96532d6 /home/LoginController.class 
redefine success, size: 1, classes:
xxx.controller.LoginController
[arthas@1725]$