Shubham Chaurasia created HIVE-24563:
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Summary: Check if we can interchange client and server sides for
umbilical for external client flow
Key: HIVE-24563
URL: https://issues.apache.org/jira/browse/HIVE-24563
Project: Hive
Issue Type: Sub-task
Components: Hive, llap
Reporter: Shubham Chaurasia
Assignee: Shubham Chaurasia
Currently we open three tcp connections when llap external client communicates
to llap.
{noformat}
llap-ext-client ............... llap
connection1: client .......>>....... server
(RPC for submitting fragments - say t1, t2, t3. llap-ext-client initiates
connection)
connection2: client .......>>....... server
(for reading the output of t1, t2, t3. llap-ext-client initiates connection)
connection3: umbilical server .......<<....... client
(RPC for status updates/heartbeat of t1, t2, t3. llap Daemon initiates
connection)
{noformat}
connection3 starts a umbilical(RPC) server at the client side to which llap
daemon keeps sending the task statuses / heartbeats and node heartbeats.
*The Problem*
In cloud based deployment, we need to open tcp traffic.
1. For connection1 and connection2, we need to open incoming tcp traffic on the
machines running llap from client.
2. For connection3, we need to open incoming tcp traffic on the machines where
llap-ext-client is running, from llap daemon.
Here clients also need to worry about opening traffic(from llap) at their end.
This jira is to evaluate the possibility of interchanging Umbilical server and
client sides i.e. umbilical server will run in llap only and llap-ext-client
will act as client and initiate the connection.
We can have umbilical address in llap splits (when get_splits is called by
external client) which the client can later connect to.
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