'Transport endpoint is not connected' every couple of days

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I am running several Drupal servers on Apache that use an S3 bucket as their 
shared back-end. Every couple of days, one of the servers will lose their 
connection to the S3 bucket with the resulting 'Transport endpoint is not 
connected'' message when trying to ls the mounted bucket. My current solution 
is:

sudo apachectl stop
sudo umount /var/www/html/files
sudo s3fs mybucket -o use_cache=/tmp -o allow_other,uid=48,gid=48 /var/www/files
sudo apachectl start

I haven't found anything in a log that points me in the right direction as to 
why the bucket is losing it's connection. Any help is appreciated - I'm just 
not sure where to start troubleshooting this.

Thanks in advance!

===================================================================
Version of s3fs being used (s3fs --version):

1.73

Version of fuse being used (pkg-config --modversion fuse):

2.9.3

System information (uname -a):

Linux ip-10-194-149-172 3.10.37-47.135.amzn1.x86_64 #1 SMP Fri Apr 18 03:28:26 
UTC 2014 x86_64 x86_64 x86_64 GNU/Linux

Distro (cat /etc/issue):

Amazon Linux AMI release 2014.03
Kernel \r on an \m

s3fs command line used (if applicable): sudo s3fs mybucket -o use_cache=/tmp -o 
allow_other,uid=48,gid=48 /var/www/files

/etc/fstab entry (if applicable):

s3fs#mybucket /var/www/files    fuse    
defaults,noatime,allow_other,uid=48,gid=48,use_cache=/tmp,default_acl=public-rea
d 0 0

s3fs syslog messages (grep s3fs /var/log/syslog):

Original issue reported on code.google.com by cam...@cmarcera.org on 21 May 2014 at 5:50