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I have been getting this error

2013/03/13 13:25:07 [crit] 49299#0: *38 rename() "/var/tmp/nginx/fastcgi_temp/6/00/0000000006" to "/var/cache/nginx/microcache/8/fd/c36e398490d9b70e3c98ba094d065fd8" failed (13: Permission denied) while reading upstream

I tried other informations in Nginx and SO forums like changing the owner of folder/file, deleting the microcache folder for Nginx to create new by itself, but nothing seems to work.

My Nginx config has www as user(owner, in FreeBSD) all these folders /var/tmp/nginx/fastcgi_temp/ and /var/cache/nginx/microcache/ has www as user(owner) and wheel as group.

To test it I even gave -R 777 to those above mentioned folders and restart nginx, but error.log still says same error. Can't even think of what might possibly be wrong here, any guidance would be appreciated.

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Great idea to willy-nilly set permissions across the board to 0777. Better install that machine from scratch now, it is probably mesed up beyond repair. –  vonbrand Mar 29 '13 at 0:14
I know 0777 is not right thing, but 0777 was just for two folders under fastcgi_tmp and microcache to test, I changed it back to 766, if you read my answer below –  Jhilke Dai Mar 29 '13 at 1:15

2 Answers 2

up vote 2 down vote accepted

I fixed this up with giving permission to its parent directories. /var/cache/nginx all had Read Only permissions, while /var/cache/nginx/microcache/ had All permissions, it worked only after I changed /var/ , /var/cache/ and /var/cache/nginx/ permission to 766. This is still weird but it works for me.

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I've had this error come up few times over last few days I've transitioned content from an old hardware server into AWS EC2 instance. To resolve, I've had to delete the /var/tmp/nginx/fastcgi_temp folder and restart nginx service. This recreates the fastcgi_temp folder and, at least for me, the problem went away after that.

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