mirror of https://github.com/alibaba/arthas.git
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
39 lines
1.3 KiB
Markdown
39 lines
1.3 KiB
Markdown
|
|
|
|
In this case, the user will resolve the HTTP 404 issue.
|
|
|
|
Visit: https://[[HOST_SUBDOMAIN]]-80-[[KATACODA_HOST]].environments.katacoda.com/a.txt
|
|
|
|
The result is:
|
|
|
|
```
|
|
Something went wrong: 404 Not Found
|
|
```
|
|
|
|
So which servlet is handle this request and returning 404?
|
|
|
|
### Trace all the Servlet methods
|
|
|
|
Start trace:
|
|
|
|
`trace javax.servlet.Servlet * > /tmp/servlet.txt`{{execute T2}}
|
|
|
|
Visit: https://[[HOST_SUBDOMAIN]]-80-[[KATACODA_HOST]].environments.katacoda.com/a.txt
|
|
|
|
In `Terminal 3`, view the contents of `/tmp/servlet.txt`:
|
|
|
|
`less /tmp/servlet.txt`{{execute T3}}
|
|
|
|
The contents of `/tmp/servlet.txt` will be more, and you need to be patient to find the longest level in the call tree.
|
|
|
|
It can be found that the request is handled by `freemarker`:
|
|
|
|
```
|
|
`---[13.974188ms] org.springframework.web.servlet.ViewResolver:resolveViewName()
|
|
+---[0.045561ms] javax.servlet.GenericServlet:<init>()
|
|
+---[min=0.045545ms,max=0.074342ms,total=0.119887ms,count=2] org.springframework.web.servlet.view.freemarker.FreeMarkerView$GenericServletAdapter:<init>()
|
|
+---[0.170895ms] javax.servlet.GenericServlet:init()
|
|
| `---[0.068578ms] javax.servlet.GenericServlet:init()
|
|
| `---[0.021793ms] javax.servlet.GenericServlet:init()
|
|
`---[0.164035ms] javax.servlet.GenericServlet:getServletContext()
|
|
``` |