Hi,
I'm in the same situation.

Hi,

someone tested the patch P7?
https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P7

Thanks

Zimbra support got back to me and indicated this bug is known and fixed in the next patch release. There is no date set yet for the patch. The p6 is out: does it solve the problem? There is no reference on the release notes. In the meanwhile, I've uploaded the p4 file (the file I've uploaded before...

I'm using the solution posted by Lorenzo without any issues.
If you need zimbrastore.jar version 8.8.15p4 I've uploaded to dropbox:

https://www.dropbox.com/s/i074ywsvufxl4 ... e.jar?dl=0

Remember to put it into /opt/zimbra/lib/jars/

I hope it will help someone

Me too.
The solution is to restart the proxy.
The real solution is to disable it: I've got no problems after disabling it.

Was someone able to solve this issue?

Anyone to help?
Anyone from Zimbra?

Thanks for the reply. The load is normal: sysadmin@zimbra:~$ top top - 16:25:21 up 3 days, 5:50, 2 users, load average: 0.16, 0.30, 0.36 Tasks: 195 total, 2 running, 193 sleeping, 0 stopped, 0 zombie Cpu(s): 0.2%us, 0.2%sy, 0.0%ni, 99.3%id, 0.2%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 14369468k total, 936269...

The ticket is RESOLVED/FIXED so we just need the patch...