Python file fail on a crontab job [closed]
Clash Royale CLAN TAG#URR8PPP
up vote
-2
down vote
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I'm using RPI zerow to run a python code (Raspbian Strech-Lite).
I need to run 2 file during startup: MQTTlogger.py and Sched_MQTT.py.
Both files run OK using command line, but when I added 2 job on crontab only one of them get executed ( the second file ). file name and path are OK.
Searching in all log files in /var/log did not show aany evidence for failure during boot.
Any idea why ?
@reboot /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py
@reboot /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/Sched_MQTT.py
EDIT1: running only
MQTTLOGGER.PY
leaving only MQTTlogger.py in crontab shows that it is a problem with running in crontab rather than running one after the other.
what can be the reason for file fail to run on a crontab job, but succeed when executed on a command line ? how can I debug it ?
EDIT2 : trying to catch crontab error
@reboot /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py >> /home/guy/crontab.log 2>&1
yields :
File "/home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py", line 1, in <module>
import paho.mqtt.client as mqtt
ImportError: No module named 'paho'
so I'm guessing it has something to do with path to the MQTT package
cron
edited Sep 8 at 9:54
Kusalananda
107k14209331
asked Sep 7 at 18:54
Guy . D
1053
closed as too broad by Rui F Ribeiro, RalfFriedl, John WH Smith, schily, thrig Sep 9 at 15:14
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
add a comment |Â
up vote
-2
down vote
favorite
I'm using RPI zerow to run a python code (Raspbian Strech-Lite).
I need to run 2 file during startup: MQTTlogger.py and Sched_MQTT.py.
Both files run OK using command line, but when I added 2 job on crontab only one of them get executed ( the second file ). file name and path are OK.
Searching in all log files in /var/log did not show aany evidence for failure during boot.
Any idea why ?
@reboot /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py
@reboot /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/Sched_MQTT.py
EDIT1: running only
MQTTLOGGER.PY
leaving only MQTTlogger.py in crontab shows that it is a problem with running in crontab rather than running one after the other.
what can be the reason for file fail to run on a crontab job, but succeed when executed on a command line ? how can I debug it ?
EDIT2 : trying to catch crontab error
@reboot /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py >> /home/guy/crontab.log 2>&1
yields :
File "/home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py", line 1, in <module>
import paho.mqtt.client as mqtt
ImportError: No module named 'paho'
so I'm guessing it has something to do with path to the MQTT package
cron
edited Sep 8 at 9:54
Kusalananda
107k14209331
asked Sep 7 at 18:54
Guy . D
1053
closed as too broad by Rui F Ribeiro, RalfFriedl, John WH Smith, schily, thrig Sep 9 at 15:14
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
Does one have to run before the other? Cron will run them pretty much simultaneously. Did you get any form of error mailed to you (or to the user whose crontab this is)? Do they depend on certain environment variables having certain values?
– Kusalananda
Sep 7 at 19:46
@Kusalananda - no, each one stands for itself. I did not find any error posted ( as said )
– Guy . D
Sep 7 at 19:48
Answered in :enter link description here
– Guy . D
Sep 8 at 11:12
add a comment |Â
up vote
-2
down vote
favorite
up vote
-2
down vote
favorite
I'm using RPI zerow to run a python code (Raspbian Strech-Lite).
I need to run 2 file during startup: MQTTlogger.py and Sched_MQTT.py.
Both files run OK using command line, but when I added 2 job on crontab only one of them get executed ( the second file ). file name and path are OK.
Searching in all log files in /var/log did not show aany evidence for failure during boot.
Any idea why ?
@reboot /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py
@reboot /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/Sched_MQTT.py
EDIT1: running only
MQTTLOGGER.PY
leaving only MQTTlogger.py in crontab shows that it is a problem with running in crontab rather than running one after the other.
what can be the reason for file fail to run on a crontab job, but succeed when executed on a command line ? how can I debug it ?
EDIT2 : trying to catch crontab error
@reboot /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py >> /home/guy/crontab.log 2>&1
yields :
File "/home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py", line 1, in <module>
import paho.mqtt.client as mqtt
ImportError: No module named 'paho'
so I'm guessing it has something to do with path to the MQTT package
cron
edited Sep 8 at 9:54
Kusalananda
107k14209331
asked Sep 7 at 18:54
Guy . D
1053
I'm using RPI zerow to run a python code (Raspbian Strech-Lite).
I need to run 2 file during startup: MQTTlogger.py and Sched_MQTT.py.
Both files run OK using command line, but when I added 2 job on crontab only one of them get executed ( the second file ). file name and path are OK.
Searching in all log files in /var/log did not show aany evidence for failure during boot.
Any idea why ?
@reboot /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py
@reboot /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/Sched_MQTT.py
EDIT1: running only
MQTTLOGGER.PY
leaving only MQTTlogger.py in crontab shows that it is a problem with running in crontab rather than running one after the other.
what can be the reason for file fail to run on a crontab job, but succeed when executed on a command line ? how can I debug it ?
EDIT2 : trying to catch crontab error
@reboot /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py >> /home/guy/crontab.log 2>&1
yields :
File "/home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py", line 1, in <module>
import paho.mqtt.client as mqtt
ImportError: No module named 'paho'
so I'm guessing it has something to do with path to the MQTT package
cron
cron
edited Sep 8 at 9:54
Kusalananda
107k14209331
asked Sep 7 at 18:54
Guy . D
1053
edited Sep 8 at 9:54
Kusalananda
107k14209331
asked Sep 7 at 18:54
Guy . D
1053
edited Sep 8 at 9:54
Kusalananda
107k14209331
edited Sep 8 at 9:54
Kusalananda
107k14209331
edited Sep 8 at 9:54
Kusalananda
107k14209331
107k14209331
asked Sep 7 at 18:54
Guy . D
1053
asked Sep 7 at 18:54
Guy . D
1053
asked Sep 7 at 18:54
Guy . D
1053
1053
closed as too broad by Rui F Ribeiro, RalfFriedl, John WH Smith, schily, thrig Sep 9 at 15:14
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
closed as too broad by Rui F Ribeiro, RalfFriedl, John WH Smith, schily, thrig Sep 9 at 15:14
Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
Does one have to run before the other? Cron will run them pretty much simultaneously. Did you get any form of error mailed to you (or to the user whose crontab this is)? Do they depend on certain environment variables having certain values?
– Kusalananda
Sep 7 at 19:46
@Kusalananda - no, each one stands for itself. I did not find any error posted ( as said )
– Guy . D
Sep 7 at 19:48
Answered in :enter link description here
– Guy . D
Sep 8 at 11:12
add a comment |Â
Does one have to run before the other? Cron will run them pretty much simultaneously. Did you get any form of error mailed to you (or to the user whose crontab this is)? Do they depend on certain environment variables having certain values?
– Kusalananda
Sep 7 at 19:46
@Kusalananda - no, each one stands for itself. I did not find any error posted ( as said )
– Guy . D
Sep 7 at 19:48
Answered in :enter link description here
– Guy . D
Sep 8 at 11:12
Does one have to run before the other? Cron will run them pretty much simultaneously. Did you get any form of error mailed to you (or to the user whose crontab this is)? Do they depend on certain environment variables having certain values?
– Kusalananda
Sep 7 at 19:46
Does one have to run before the other? Cron will run them pretty much simultaneously. Did you get any form of error mailed to you (or to the user whose crontab this is)? Do they depend on certain environment variables having certain values?
– Kusalananda
Sep 7 at 19:46
@Kusalananda - no, each one stands for itself. I did not find any error posted ( as said )
– Guy . D
Sep 7 at 19:48
@Kusalananda - no, each one stands for itself. I did not find any error posted ( as said )
– Guy . D
Sep 7 at 19:48
Answered in :enter link description here
– Guy . D
Sep 8 at 11:12
Answered in :enter link description here
– Guy . D
Sep 8 at 11:12
add a comment |Â
2 Answers
2
active
oldest
votes
up vote
1
down vote
Most likely the issue is that cron is trying to run these jobs (one or both) before a service has become available. The easy way to fix this is to add a sleep delay to wait for the required services to get started:
@reboot sleep 10; /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py && /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/Sched_MQTT.py
Your issue is similar to the one in this question, so you may wish to refer to it for additional information.
You may also want to redirect your stderr to a file to capture any output for debugging purposes. Do that by adding this to the and of the crontab line I've listed above:
> ~/cronjoblog 2>&1
answered Sep 8 at 2:10
Seamus
22610
thank you for your answer. I'm changing my original question - since trying to run onlyMQTTlogger.pyfails. so it has nothing to do with the fact of sleep period between - BUT can you explain more aboutstderrand how to redirect errors to a file
– Guy . D
Sep 8 at 3:57
Did you try running withsleep?
– Seamus
Sep 8 at 13:23
Yes. See edit2- it was a path issue. ðŸ™ÂðŸÂ¾
– Guy . D
Sep 8 at 13:59
So - all is well then... your script runs??
– Seamus
Sep 8 at 14:02
yes, by the way- since MQTT needs some time until network is UP,sleepwas necessary!
– Guy . D
Sep 8 at 14:06
 |Â
show 3 more comments
up vote
0
down vote
two things that solved my problem:
1 ) adding sleep to crontab- as Seamus suggested:
@reboot sleep 10; /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py >> /home/guy/crontab.log 2>&1`
2) fixing path inside code to fix path ( as asked in stackover flow ), reffer
answered Sep 8 at 14:09
Guy . D
1053
add a comment |Â
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
Most likely the issue is that cron is trying to run these jobs (one or both) before a service has become available. The easy way to fix this is to add a sleep delay to wait for the required services to get started:
@reboot sleep 10; /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py && /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/Sched_MQTT.py
Your issue is similar to the one in this question, so you may wish to refer to it for additional information.
You may also want to redirect your stderr to a file to capture any output for debugging purposes. Do that by adding this to the and of the crontab line I've listed above:
> ~/cronjoblog 2>&1
answered Sep 8 at 2:10
Seamus
22610
thank you for your answer. I'm changing my original question - since trying to run onlyMQTTlogger.pyfails. so it has nothing to do with the fact of sleep period between - BUT can you explain more aboutstderrand how to redirect errors to a file
– Guy . D
Sep 8 at 3:57
Did you try running withsleep?
– Seamus
Sep 8 at 13:23
Yes. See edit2- it was a path issue. ðŸ™ÂðŸÂ¾
– Guy . D
Sep 8 at 13:59
So - all is well then... your script runs??
– Seamus
Sep 8 at 14:02
yes, by the way- since MQTT needs some time until network is UP,sleepwas necessary!
– Guy . D
Sep 8 at 14:06
 |Â
show 3 more comments
up vote
1
down vote
Most likely the issue is that cron is trying to run these jobs (one or both) before a service has become available. The easy way to fix this is to add a sleep delay to wait for the required services to get started:
@reboot sleep 10; /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py && /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/Sched_MQTT.py
Your issue is similar to the one in this question, so you may wish to refer to it for additional information.
You may also want to redirect your stderr to a file to capture any output for debugging purposes. Do that by adding this to the and of the crontab line I've listed above:
> ~/cronjoblog 2>&1
answered Sep 8 at 2:10
Seamus
22610
thank you for your answer. I'm changing my original question - since trying to run onlyMQTTlogger.pyfails. so it has nothing to do with the fact of sleep period between - BUT can you explain more aboutstderrand how to redirect errors to a file
– Guy . D
Sep 8 at 3:57
Did you try running withsleep?
– Seamus
Sep 8 at 13:23
Yes. See edit2- it was a path issue. ðŸ™ÂðŸÂ¾
– Guy . D
Sep 8 at 13:59
So - all is well then... your script runs??
– Seamus
Sep 8 at 14:02
yes, by the way- since MQTT needs some time until network is UP,sleepwas necessary!
– Guy . D
Sep 8 at 14:06
 |Â
show 3 more comments
up vote
1
down vote
up vote
1
down vote
Most likely the issue is that cron is trying to run these jobs (one or both) before a service has become available. The easy way to fix this is to add a sleep delay to wait for the required services to get started:
@reboot sleep 10; /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py && /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/Sched_MQTT.py
Your issue is similar to the one in this question, so you may wish to refer to it for additional information.
You may also want to redirect your stderr to a file to capture any output for debugging purposes. Do that by adding this to the and of the crontab line I've listed above:
> ~/cronjoblog 2>&1
answered Sep 8 at 2:10
Seamus
22610
Most likely the issue is that cron is trying to run these jobs (one or both) before a service has become available. The easy way to fix this is to add a sleep delay to wait for the required services to get started:
@reboot sleep 10; /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py && /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/Sched_MQTT.py
Your issue is similar to the one in this question, so you may wish to refer to it for additional information.
You may also want to redirect your stderr to a file to capture any output for debugging purposes. Do that by adding this to the and of the crontab line I've listed above:
> ~/cronjoblog 2>&1
answered Sep 8 at 2:10
Seamus
22610
answered Sep 8 at 2:10
Seamus
22610
answered Sep 8 at 2:10
Seamus
22610
answered Sep 8 at 2:10
Seamus
22610
22610
thank you for your answer. I'm changing my original question - since trying to run onlyMQTTlogger.pyfails. so it has nothing to do with the fact of sleep period between - BUT can you explain more aboutstderrand how to redirect errors to a file
– Guy . D
Sep 8 at 3:57
Did you try running withsleep?
– Seamus
Sep 8 at 13:23
Yes. See edit2- it was a path issue. ðŸ™ÂðŸÂ¾
– Guy . D
Sep 8 at 13:59
So - all is well then... your script runs??
– Seamus
Sep 8 at 14:02
yes, by the way- since MQTT needs some time until network is UP,sleepwas necessary!
– Guy . D
Sep 8 at 14:06
 |Â
show 3 more comments
thank you for your answer. I'm changing my original question - since trying to run onlyMQTTlogger.pyfails. so it has nothing to do with the fact of sleep period between - BUT can you explain more aboutstderrand how to redirect errors to a file
– Guy . D
Sep 8 at 3:57
Did you try running withsleep?
– Seamus
Sep 8 at 13:23
Yes. See edit2- it was a path issue. ðŸ™ÂðŸÂ¾
– Guy . D
Sep 8 at 13:59
So - all is well then... your script runs??
– Seamus
Sep 8 at 14:02
yes, by the way- since MQTT needs some time until network is UP,sleepwas necessary!
– Guy . D
Sep 8 at 14:06
thank you for your answer. I'm changing my original question - since trying to run only
MQTTlogger.py fails. so it has nothing to do with the fact of sleep period between - BUT can you explain more about stderr and how to redirect errors to a file– Guy . D
Sep 8 at 3:57
thank you for your answer. I'm changing my original question - since trying to run only
MQTTlogger.py fails. so it has nothing to do with the fact of sleep period between - BUT can you explain more about stderr and how to redirect errors to a file– Guy . D
Sep 8 at 3:57
Did you try running with
sleep?– Seamus
Sep 8 at 13:23
Did you try running with
sleep?– Seamus
Sep 8 at 13:23
Yes. See edit2- it was a path issue. ðŸ™ÂðŸÂ¾
– Guy . D
Sep 8 at 13:59
Yes. See edit2- it was a path issue. ðŸ™ÂðŸÂ¾
– Guy . D
Sep 8 at 13:59
So - all is well then... your script runs??
– Seamus
Sep 8 at 14:02
So - all is well then... your script runs??
– Seamus
Sep 8 at 14:02
yes, by the way- since MQTT needs some time until network is UP,
sleep was necessary!– Guy . D
Sep 8 at 14:06
yes, by the way- since MQTT needs some time until network is UP,
sleep was necessary!– Guy . D
Sep 8 at 14:06
 |Â
show 3 more comments
up vote
0
down vote
two things that solved my problem:
1 ) adding sleep to crontab- as Seamus suggested:
@reboot sleep 10; /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py >> /home/guy/crontab.log 2>&1`
2) fixing path inside code to fix path ( as asked in stackover flow ), reffer
answered Sep 8 at 14:09
Guy . D
1053
add a comment |Â
up vote
0
down vote
two things that solved my problem:
1 ) adding sleep to crontab- as Seamus suggested:
@reboot sleep 10; /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py >> /home/guy/crontab.log 2>&1`
2) fixing path inside code to fix path ( as asked in stackover flow ), reffer
answered Sep 8 at 14:09
Guy . D
1053
add a comment |Â
up vote
0
down vote
up vote
0
down vote
two things that solved my problem:
1 ) adding sleep to crontab- as Seamus suggested:
@reboot sleep 10; /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py >> /home/guy/crontab.log 2>&1`
2) fixing path inside code to fix path ( as asked in stackover flow ), reffer
answered Sep 8 at 14:09
Guy . D
1053
two things that solved my problem:
1 ) adding sleep to crontab- as Seamus suggested:
@reboot sleep 10; /usr/bin/python3 /home/guy/github/SmartHome_SoC/MQTTswitches/MQTTlogger.py >> /home/guy/crontab.log 2>&1`
2) fixing path inside code to fix path ( as asked in stackover flow ), reffer
answered Sep 8 at 14:09
Guy . D
1053
answered Sep 8 at 14:09
Guy . D
1053
answered Sep 8 at 14:09
Guy . D
1053
answered Sep 8 at 14:09
Guy . D
1053
1053
add a comment |Â
add a comment |Â
Does one have to run before the other? Cron will run them pretty much simultaneously. Did you get any form of error mailed to you (or to the user whose crontab this is)? Do they depend on certain environment variables having certain values?
– Kusalananda
Sep 7 at 19:46
@Kusalananda - no, each one stands for itself. I did not find any error posted ( as said )
– Guy . D
Sep 7 at 19:48
Answered in :enter link description here
– Guy . D
Sep 8 at 11:12