EX4500 Dropped Packets

We were running Junos 12.3 R11.2 on our EX4500 Core, an EX4500 in our DR site, and all of our EX4200 edge switches

We upgraded all of them to Junos 15.1 R5

We use Veeam for backup and replication and two Nimble arrays, one in production and one in DR

While a backup or replication job runs which pipes data through the EX4500 in production to the EX4500 in DR., we are seeing dropped packets. This is a 10 gig connection that we are not even close to saturating. This did not happen under the previous version of Junos.

Any idea on where to start with troubleshooting this?

Here is the 10 gig interface from the EX4500 in our DR site to the Nimble array showing the output drops

Output errors:
Carrier transitions: 0, Errors: 0, Drops: 834, Collisions: 0, Aged packets: 0,
FIFO errors: 0, HS link CRC errors: 0, MTU errors: 0, Resource errors: 0