Ports Used by Impala
Impala uses the TCP ports listed in the following table.
Before deploying Impala, ensure these ports are open on each system. You can use the corresponding settings in Cloudera Manager to overwrite the default port numbers.
| Scope | Cloudera Manager Setting / Startup Flag | Default Port | Comment |
|---|---|---|---|
| Impala Daemon | Impala Daemon Frontend Port --beeswax_port |
21000 | Port on which Beeswax client requests are served by Impala Daemons. |
| Impala Daemon | Impala Daemon Frontend Port --hs2_port |
21050 | Port on which HiveServer2 client requests are served by Impala Daemons. |
| Impala Daemon | Impala Daemon Backend Port --be_port |
22000 | Internal use only. Impala daemons use this port to communicate with each other. |
| Impala Daemon | StateStoreSubscriber Service Port
--state_store_subscriber_port |
23000 | Internal use only. Impala daemons listen on this port for updates from the StateStore daemon. |
| Catalog Daemon | StateStoreSubscriber Service Port
--state_store_subscriber_port |
23020 | Internal use only. The catalog daemon listens on this port for updates from the StateStore daemon. |
| Impala Daemon | Impala Daemon HTTP Server Port
--webserver_port |
25000 | Impala debug Web UI for administrators to monitor and troubleshoot. |
| Impala StateStore Daemon | StateStore HTTP Server Port --webserver_port |
25010 | StateStore debug Web UI for administrators to monitor and troubleshoot. |
| Impala Catalog Daemon | Catalog HTTP Server Port --webserver_port |
25020 | Catalog Server debug Web UI for administrators to monitor and troubleshoot. |
| Impala StateStore Daemon | StateStore Service Port --state_store_port |
24000 | Internal use only. The StateStore daemon listens on this port for registration/unregistration requests. |
| Impala Catalog Daemon | Catalog Service Port --catalog_service_port |
26000 | Internal use only. The catalog service uses this port to communicate with the Impala daemons. |
| Impala Daemon | KRPC Port --krpc_port |
27000 | Internal use only. Impala daemons use this port for KRPC based communication with each other. |
| Impala Daemon | HiveServer2 HTTP Port --hs2_http_port |
28000 | Used to transmit commands and receive results by client applications over HTTP via the HiveServer2 protocol. |
