SWT / anr problem - storagemanagerservice stuck

This chapter mainly introduces vold monitor timeout,StorageManagerService blocked Etc SWT Analysis of type problems SOP

The characteristics of the problem

1. two trace Agreement
2. vold monitor timeout Or wait binder Opposite end vold
3. user edition vold nothing dump Information
4. More often in Monkey/APP File read and write / Access external T Card, etc

Problem solving SOP

 

Specific cases

1. Confirm the question time point and key words

//SWT info.
06-29 12:09:45.004 1205 1234 I watchdog: Blocked in monitor com.android.server.StorageManagerService on foreground thread (android.fg)

2. Find twice in the corresponding time period trace Agreement

Such as ,

----- pid 1205 at 2021-06-29 12:09:09 -----
Cmd line: system_server
…

----- pid 1205 at 2021-06-29 12:09:45 -----
Cmd line: system_server
…
"android.fg" prio=5 tid=12 Native
| group="main" sCount=1 dsCount=0 flags=