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From "Andrew Lee (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-12222) Define port range in property for RPCServer
Date Wed, 21 Oct 2015 17:30:27 GMT
Andrew Lee created HIVE-12222:
---------------------------------

             Summary: Define port range in property for RPCServer
                 Key: HIVE-12222
                 URL: https://issues.apache.org/jira/browse/HIVE-12222
             Project: Hive
          Issue Type: Improvement
          Components: CLI
    Affects Versions: 1.2.1
         Environment: Apache Hadoop 2.7.0
Apache Hive 1.2.1
Apache Spark 1.5.1

            Reporter: Andrew Lee


Creating this JIRA after discussin with Xuefu on the dev mailing list. Would need some help
to review and update the fields in this JIRA ticket, thanks.

I notice that in 
./spark-client/src/main/java/org/apache/hive/spark/client/rpc/RpcServer.java

The port number is assigned with 0 which means it will be a random port every time when the
RPC Server is created to talk to Spark in the same session.
Because of this, this is causing problems to configure firewall between the 
HiveCLI RPC Server and Spark due to unpredictable port numbers here. In other word, users
need to open all hive ports range 
from Data Node => HiveCLI (edge node).

{code}
 this.channel = new ServerBootstrap()
      .group(group)
      .channel(NioServerSocketChannel.class)
      .childHandler(new ChannelInitializer<SocketChannel>() {
          @Override
          public void initChannel(SocketChannel ch) throws Exception {
            SaslServerHandler saslHandler = new SaslServerHandler(config);
            final Rpc newRpc = Rpc.createServer(saslHandler, config, ch, group);
            saslHandler.rpc = newRpc;

            Runnable cancelTask = new Runnable() {
                @Override
                public void run() {
                  LOG.warn("Timed out waiting for hello from client.");
                  newRpc.close();
                }
            };
            saslHandler.cancelTask = group.schedule(cancelTask,
                RpcServer.this.config.getServerConnectTimeoutMs(),
                TimeUnit.MILLISECONDS);

          }
      })
{code}

2 Main reasons.

- Most users (what I see and encounter) use HiveCLI as a command line tool, and in order to
use that, they need to login to the edge node (via SSH). Now, here comes the interesting part.
Could be true or not, but this is what I observe and encounter from time to time. Most users
will abuse the resource on that edge node (increasing HADOOP_HEAPSIZE, dumping output to local
disk, running huge python workflow, etc), this may cause the HS2 process to run into OOME,
choke and die, etc. various resource issues including others like login, etc.

- Analyst connects to Hive via HS2 + ODBC. So HS2 needs to be highly available. This makes
sense to run it on the gateway node or a service node and separated from the HiveCLI.
The logs are located in different location, monitoring and auditing is easier to run HS2 with
a daemon user account, etc. so we don't want users to run HiveCLI where HS2 is running.
It's better to isolate the resource this way to avoid any memory, file handlers, disk space,
issues.

>From a security standpoint, 

- Since users can login to edge node (via SSH), the security on the edge node needs to be
fortified and enhanced. Therefore, all the FW comes in and auditing.

- Regulation/compliance for auditing is another requirement to monitor all traffic, specifying
ports and locking down the ports makes it easier since we can focus
on a range to monitor and audit.



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