There are 3 error code types in BE: OLAPStatus AgentStatus Status.
It is very confused and sometimes conflict during write code.
I will try to unify them to Status.
1. replace all boost::shared_ptr to std::shared_ptr
2. replace all boost::scopted_ptr to std::unique_ptr
3. replace all boost::scoped_array to std::unique<T[]>
4. replace all boost:thread to std::thread
In the previous implementation, clone task will continue download files
even if some error happened. This may cause unexpected problem. This
Change List refactor it to that when error happends, clone task will
fail total and try to clone from another remote source.
Besides above change, I call FileUtils::remove_all and create_dir
instead of boost one, which may cause exception. What's more
AgentMasterClient is replaced with ThriftRpcHelper, by this change
conncection can be reused.
1. Unify the thrift rpc timeout from BE to FE.
Add a BE config 'thrift_rpc_timeout_ms', default is 5000
2. Add hostname in "show proc '/frontends';" stmt result.
3. Fix a lock order bug in Load.java
