Zimbra Forums

Hello,
Which Zimbra version are you running, on which OS, and what are the resources you have for the server?

Using Zimbra 8.7.11_GA_1854.FOSS
On Ubuntu LTS 16.0.4
Server with
8 Core CPU
48 GB RAM
100 GB SSD
1.5 TB HDD

keep getting I have also disabled the proxy service

Error java.io.IOException: Too many open files

I Keep seeing that the memory usage gets maxed out if left running.
lsof reveals a lot of the below entries
java 2179 2569 zimbra 331r FIFO 0,10 0t0 131905134 pipe
java 2179 2569 zimbra 332w FIFO 0,10 0t0 131905134 pipe
java 2179 2569 zimbra 333u a_inode 0,11 0 7041 [eventpoll]

On searching the internet I looked into this article which seemed to perfectly define the error.
http://www.adarshr.com/too-many-open-files
I have disabled the proxy service
switched from Ubuntu to Centos
I have also tried to block all connection other than required ports all to no avail.
What is the easiest and best method to downgrade the version?
I also tried to monitor the files opens one file which kept repeatedly appearing other than pipe:[{sequentially increasing number}] and anon_inode:[eventpoll] is
/opt/zimbra/jetty-distribution-9.3.5.v20151012/lib/websocket/websocket-server-9.3.5.v20151012.jar