on building docker image level=error msg="Can't close tar writer: io: read/write on closed pipe"

Question

time="2017-10-27T07:39:20Z" level=error msg="Can't add file /var/app/current/app/content_classifier/forest.pickle to tar: io: read/write on closed pipe" 
time="2017-10-27T07:39:20Z" level=error msg="Can't close tar writer: io: read/write on closed pipe"
Failed to build Docker image aws_beanstalk/staging-app:  tar writer: io: read/write on closed pipe" 
Error response from daemon: Untar error on re-exec cmd: fork/exec /proc/self/exe: cannot allocate memory. Check snapshot logs for details. (Executor::NonZeroExitStatus)

I have a Pickle object in django_app/content_classifer object. There is a class to predict the result and it's initializing itself when celery tasks file gets initialised.

docker build keeps failing after giving an error message as in the title.

Answer 1

if you are on Mac, make sure docker hub is running

Answer 2

The problem faced because the process that generates the pickle object has a diffrent user assigned then process that was accessing the pickle object.

I define the location for pickle object in the setting file.

picklefile = "usr/local/webapp/forest.pickle"

I simply added the step as following in Dockerfile.

RUN chown -R /user/local/webapp/