1.3.4、CDH 搭建Hadoop在安装之前(端口---Impala使用的端口)

Impala使用的端口

Impala使用下表中列出的TCP端口。在部署Impala之前，请确保在每个系统上打开这些端口。

Component	Service	Port	Access Requirement	Comment
Impala Daemon	Impala Daemon Frontend Port	21000	External	用于传输命令和接收结果 impala-shell和Cloudera ODBC驱动程序的1.2版。
Impala Daemon	Impala Daemon Frontend Port	21050	External	Used to transmit commands and receive results by applications, such as Business Intelligence tools, using JDBC, the Beeswax query editor in Hue, and version 2.0 or higher of the Cloudera ODBC driver. 用于传输命令并通过应用程序（如商业智能工具），使用JDBC，Hue中的Beeswax查询编辑器以及Cloudera ODBC驱动程序的2.0或更高版本接收结果。
Impala Daemon	Impala Daemon Backend Port	22000	Internal	Internal use only. Impala daemons use this port for Thrift based communication with each other. 仅供内部使用。Impala守护程序使用此端口进行基于Thrift的通信。
Impala Daemon	StateStoreSubscriber Service Port	23000	Internal	Internal use only. Impala daemons listen on this port for updates from the statestore daemon. 仅供内部使用。Impala守护程序在此端口上侦听statestore守护程序的更新。
Catalog Daemon	StateStoreSubscriber Service Port	23020	Internal	Internal use only. The catalog daemon listens on this port for updates from the statestore daemon. 仅供内部使用。目录守护程序在此端口上侦听statestore守护程序的更新。
Impala Daemon	Impala Daemon HTTP Server Port	25000	External	Impala web interface for administrators to monitor and troubleshoot. Impala Web界面供管理员监控和排除故障。
Impala StateStore Daemon	StateStore HTTP Server Port	25010	External	StateStore web interface for administrators to monitor and troubleshoot. StateStore Web界面供管理员监控和排除故障。
Impala Catalog Daemon	Catalog HTTP Server Port	25020	External	Catalog service web interface for administrators to monitor and troubleshoot. New in Impala 1.2 and higher. 目录服务Web界面，供管理员监控和排除故障。Impala 1.2及更高版本的新功能。
Impala StateStore Daemon	StateStore Service Port	24000	Internal	Internal use only. The statestore daemon listens on this port for registration/unregistration requests. 仅供内部使用。statestore守护程序在此端口上侦听注册/取消注册请求。
Impala Catalog Daemon	StateStore Service Port	26000	Internal	Internal use only. The catalog service uses this port to communicate with the Impala daemons. New in Impala 1.2 and higher. 仅供内部使用。目录服务使用此端口与Impala守护程序进行通信。Impala 1.2及更高版本的新功能。
Impala Daemon	KRPC Port	27000	Internal	Internal use only. Impala daemons use this port for KRPC based communication with each other. 仅供内部使用。Impala守护程序使用此端口进行基于KRPC的通信。
Impala Daemon	Llama Callback Port	28000	Internal	Internal use only. Impala daemons use to communicate with Llama. New in CDH 5.0 and higher. 仅供内部使用。Impala守护进程用于与Llama通信。新的CDH 5.0及更高版本。
Impala Llama ApplicationMaster	Llama Thrift Admin Port	15002	Internal	Internal use only. New in CDH 5.0 and higher. 仅供内部使用。新的CDH 5.0及更高版本。
Impala Llama ApplicationMaster	Llama Thrift Port	15000	Internal	Internal use only. New in CDH 5.0 and higher. 仅供内部使用。新的CDH 5.0及更高版本。
Impala Llama ApplicationMaster	Llama HTTP Port	15001	External	Llama service web interface for administrators to monitor and troubleshoot. New in CDH 5.0 and higher. Llama服务Web界面，供管理员监控和排除故障。新的CDH 5.0及更高版本。