By looking at the log you have sent, It seems that your server is not configured to handle the large files.
Memory is not properly allocated to handle the larger file uploads on the server. In order to rectify the issue, you need to configure some parameters as given below.
Add the following lines in
( You can tune the above parameters according to your need )
Also, please consult with your server admin about the same changes. Maybe he will be able to give you the better option to configure the server according to your need.