Read entries from bookie has no timeout

[dao-jun]

I found that Bookkeeper client has no timeout for read operations, timeout is a very important part in RPC system

Although there is a field named lastReadCallback in ManagedLedgerImp to check read ops timeout, but from my understanding, it just checks the last read operation: if there is 3 read operations A,B,C, the lastReadCallback will be set to C and just check C even A and B are not finished.

I don't understand why Bookkeeper client has no timeout for read operations and why ManagedLedgerImpl just check the last read operation.

Your answer is greatly appreciated.