SWT / anr problem - SWT caused by too long dump time

1. Confirm the problem time point ：

05-07 03:15:53.220  1150  2238 I watchdog: Blocked in handler on ActivityManager (ActivityManager)
block module: ActivityManager      timeout: 60s

2. View the call stack, two trace It's consistent , as follows ：

from system_server blocked Of thread Start to analyze , This question is ActivityManager

----- pid 1150 at 2019-05-07 03:15:22 -----
Cmd line: system_server
"ActivityManager" prio=5 tid=13 Native
  | group="main" sCount=1 dsCount=0 flags=1 obj=0x15040828 self=0xa7ebb400
  | sysTid=1166 nice=-2 cgrp=default sched=0/0 handle=0x97980970
  | state=S schedstat=( 450054758690 793897362594 812502 ) utm=20997 stm=24008 core=3 HZ=100
  | sta