adafruit/Adafruit_Python_DHT

IOError: [Errno 24] Too many open files: '/proc/cpuinfo'

Closed this issue · 2 comments

xtian777x commented

  • Platform/operating system (i.e. Raspberry Pi with Raspbian operating system,
    Windows 32-bit, Windows 64-bit, Mac OSX 64-bit, etc.): Raspberry Pi 3

  • Python version (run python -version or python3 -version): Python 2.7.13

  • Error message you are receiving, including any Python exception traces:

File "/usr/local/lib/python2.7/dist-packages/Adafruit_DHT-1.4.0-py2.7-linux-armv7l.egg/Adafruit_DHT/platform_detect.py", line 9
with open('/proc/cpuinfo', 'r') as infile:
IOError: [Errno 24] Too many open files: '/proc/cpuinfo'

  • List the steps to reproduce the problem below (if possible attach code or commands
    to run):

Run a python API that has an endpoint calling Adafruit_DHT.read_retry. Make a cronjob that calls the enpoint every minute.

The problem comes from lines 65 and 92 in:

https://github.com/adafruit/Adafruit_Python_DHT/blob/master/Adafruit_DHT/platform_detect.py

The code is opening the file '/proc/cpuinfo' but not closing it. So if a Python sessions stays open, this will eventually open too many files. The solution is to close the file after reading it.

xtian777x commented

Well the files are opened using with so they should be closed automatically....still not sure then why I'm getting this error...

ladyada commented

we;re deprecating this library soon, please try https://github.com/adafruit/Adafruit_CircuitPython_DHT