RPC queue

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There are 8 users.

1. users Rpc.call("test",allusers); time 00:00:00:01
2. users Rpc.call("test",allusers); time 00:00:00:02
6. users Rpc.call("test",allusers); time 00:00:00:03
3. users Rpc.call("test",allusers); time 00:00:00:04
5. users Rpc.call("test",allusers); time 00:00:00:05

I wonder Is this kind of problem arises



8. users result "rpc" queue (transmitted to the user)
1-) is it OK absolutely
1.2.6.3.5 ?

Or
2-) Mybe RPC s Can be lost
1.2.5 ?

Or
3- ) Is it well may be mixed
6.1.3.5.2


Which would

I hope you can explain
Thanks