CDN Sync Tool – Errors when uploading to S3

Using CDN Sync Tool to upload files to Amazon S3 for use with Cloudfront.

Getting 2 errors when syncing (I’m having to use force upload, as for some reason CDNST thinks all my files have been uploaded already).

1. cURL error: Failed to open/read local data from file/application (26)
This error isn’t actually preventing the files from being uploaded though

2. [function.fopen]: failed to open stream: Too many open files in /var/www/xxxxx/wp-content/plugins/cdn-sync-tool/lib/awssdk/lib/requestcore/requestcore.class.php
This error does stop files from being uploaded -> S3.

So, the 2nd error occurs after a certain (changeable) number of files have been uploaded, and then affects all remaining uploads.