# Sample MQTT publisher app starts with error

**URL:** <https://mangoh.discourse.group/t/sample-mqtt-publisher-app-starts-with-error/3087>\
**Category:** mangOH Red\
**Created:** [November 25, 2019, 7:18pm UTC](https://mangoh.discourse.group/t/sample-mqtt-publisher-app-starts-with-error/3087 "2019-11-25T19:18:02Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![garify](https://avatars.discourse-cdn.com/v4/letter/g/d26b3c/32.png) [@garify](https://mangoh.discourse.group/u/garify)\
**Post date:** [November 25, 2019, 7:18pm UTC](https://mangoh.discourse.group/t/sample-mqtt-publisher-app-starts-with-error/3087/1 "2019-11-25T19:18:02Z")

</div>

I’m able to successfully build and deploy the `mqtt` sample app. However, when I start the app, I get the error log below. It seems like something to do with permissions. Can someone kindly assist me with this.

```auto
Nov 25 21:41:07 swi-mdm9x28-wp user.notice kernel: [70729.320858] audit: type=1400 audit(1574714467.399:57): lsm=SMACK fn=smack_inode_getattr action=denied subject="app.mqttClient" object="admin" requested=r pid=5284 comm="mqttClientServi" path="pipe:[387489]" dev="pipefs" ino=                                                                                                                                                                                                    
Nov 25 20:41:07 swi-mdm9x28-wp user.warn Legato: -WRN- | mqttClientService[5284]/mqttClientService T=main | mqttClientService.c mqtt_Connect() 361 | Socket error                                                                            
Nov 25 20:41:07 swi-mdm9x28-wp user.err Legato: =ERR= | testPublisher[5453]/testPublisher T=main | testPublisher.c _testPublisher_COMPONENT_INIT() 137 | Connection failed! error -6                                                         
Nov 25 21:41:07 swi-mdm9x28-wp user.info Legato: INFO | supervisor[5250]/supervisor T=main | supervisor.c HandleRebootExpiry() 534 | Expired reboot timer

```

My environment is as follows:

```auto
Leaf: leaf version 2.1
Legato: wp76-legato_19.02.0-201903211732
Device: wp76xx, (Mangoh Red, wp7606)

```