20 paho-mqtt遇到mqtt0的错误，出错在MQTTstrlen函数

发布于 2022-02-12 09:54:34 浏览：1283 订阅该版

[tocm]

主控：STM32H743
RTT版本：4.0.5
使用paho-mqtt包
目前在运行中经常会遇到hard fault on thread: mqtt0的错误
**报错1：正常运行时报错**
```
total memory: 479832
used memory : 56360
maximum allocated memory: 65056

psr: 0x01000000
r00: 0x462d3db8
r01: 0x00000000
r02: 0x462d3db9
r03: 0x00000000
r04: 0x00000000
r05: 0x0000006f
r06: 0x222c3130
r07: 0x00000400
r08: 0x00000000
r09: 0x00000070
r10: 0x00006570
r11: 0x24010c88
r12: 0x08033a39
 lr: 0x0802d975
 pc: 0x080205da
hard fault on thread: mqtt0

thread   pri  status      sp     stack size max used left tick  error
-------- ---  ------- ---------- ----------  ------  ---------- ---
LoraRecD   8  suspend 0x00000720 0x00002000    30%   0x0000000d 000
LoraRecD   8  suspend 0x00000720 0x00002000    31%   0x0000000d 000
Gateway_   8  suspend 0x00000108 0x00000400    40%   0x0000000b 000
mqtt0     10  running 0x0000028c 0x00002000    17%   0x00000001 000
FeedDog_  16  suspend 0x0000007c 0x00000100    48%   0x00000014 000
tshell    20  suspend 0x000000f4 0x00001000    05%   0x00000009 000
wiz        5  suspend 0x00000094 0x00000400    14%   0x00000014 000
wiz_stat  28  suspend 0x0000008c 0x00000800    13%   0x0000000f 000
sim1      30  suspend 0x000000a0 0x00000600    19%   0x00000012 000
at_clnt    9  suspend 0x000000b0 0x00000600    19%   0x00000002 000
sys_work  23  suspend 0x0000005c 0x00000800    32%   0x00000002 000
tidle0    31  ready   0x00000060 0x00000100    53%   0x00000017 000
timer      4  suspend 0x00000078 0x00000200    23%   0x00000009 000
main      10  suspend 0x0000011c 0x00000800    40%   0x00000011 000
FPU active!
bus fault:
SCB_CFSR_BFSR:0x82 PRECISERR SCB->BFAR:462D3DB8
```
**报错2：在断线重连后报错**
```
[W/at.clnt] execute command (AT+CIPSEND=0,2) timeout (5000 ticks)!
[D/mqtt.sample] inter mqtt_offline_callback!
[D/mqtt] restart!
[D/mqtt.sample] inter mqtt_connect_callback!
[D/mqtt] ipv4 address port: 1883
[D/mqtt] HOST = '112.126.87.188'
[I/mqtt] MQTT server connect success.
[I/mqtt] Subscribe #0 /mqtt/test OK!
[I/mqtt] Subscribe #1 wolian/hbdz/WLZN102100002/# OK!
[D/mqtt.sample] inter mqtt_online_callback!
psr: 0x01000000
r00: 0x50324de2
r01: 0x00000000
r02: 0x50324de3
r03: 0x00000000
r04: 0x00000000
r05: 0x00000039
r06: 0x2c313a22
r07: 0x00000400
r08: 0x00000000
r09: 0x00000039
r10: 0x00007b2c
r11: 0x240113c0
r12: 0x08034101
 lr: 0x0802dfe9
 pc: 0x080205da
hard fault on thread: mqtt0

thread   pri  status      sp     stack size max used left tick  error
-------- ---  ------- ---------- ----------  ------  ---------- ---
LoraRecD   8  suspend 0x00000728 0x00002000    30%   0x0000000f 000
LoraRecD   8  suspend 0x00000728 0x00002000    31%   0x00000009 000
Gateway_   8  suspend 0x00000108 0x00000400    88%   0x00000014 000
mqtt0     10  running 0x00000284 0x00002000    17%   0x00000001 000
FeedDog_  16  ready   0x0000007c 0x00000100    48%   0x00000014 -02
tshell    20  suspend 0x000000f4 0x00001000    05%   0x00000003 000
wiz        5  suspend 0x00000094 0x00000400    14%   0x00000014 000
wiz_stat  28  suspend 0x0000008c 0x00000800    13%   0x0000000e 000
sim1      30  suspend 0x000000a0 0x00000600    18%   0x0000000f 000
at_clnt    9  suspend 0x000000b0 0x00000600    20%   0x00000004 000
sys_work  23  suspend 0x0000005c 0x00000800    30%   0x00000005 000
tidle0    31  ready   0x00000048 0x00000100    53%   0x00000002 000
timer      4  suspend 0x00000078 0x00000200    23%   0x00000009 000
main      10  suspend 0x0000011c 0x00000800    71%   0x00000002 000
FPU active!
bus fault:
SCB_CFSR_BFSR:0x82 PRECISERR SCB->BFAR:50324DE2

```
根据lr指针的位置定位到是程序的MQTTstrlen内出的问题
![image.png](https://oss-club.rt-thread.org/uploads/20220212/c98a4f536de462c83d8afa5e483cab1c.png)
paho-mqtt的配置如下

![image.png](https://oss-club.rt-thread.org/uploads/20220212/f05d8f60b5bc0004b2fab536c228a952.png)

以前也遇到过mqtt0的问题，之前是内存泄露导致的，这次没有内存泄露，但是还是出现了错误，请问大家，这个是哪个地方出了问题？