The following table lists the default ports used by the various Flume services. (Note: Neither of these services are used in a standard HDP installation.)
| Service | Servers | Default Ports Used | Protocol | Description | Need End User Access? | Configuration Parameters |
| Flume | Flume Agent | 41414 | TCP | Flume performance metrics in JSON format | Yes (client API needs) | master.port.client in accumulo-site.xml |
| Flume | HDFS Sink | 8020 | TCP | Communication from Flume into the Hadoop cluster's NameNode | Yes (client API needs) | tserver.port.client in accumulo-site.xml |
| Flume | HDFS Sink | 9000 | TCP | Communication from Flume into the Hadoop cluster's NameNode | No | gc.port.client in accumulo-site.xml |
| Flume | HDFS Sink | 50010 | TCP | Communication from Flume into the Hadoop cluster's HDFS DataNode | No | |
| Flume | HDFS Sink | 50020 | TCP | Communication from Flume into the Hadoop cluster's HDFS DataNode | No | |
| Flume | HDFS Sink | 2181 | TCP | Communication from Flume into the Hadoop cluster's Zookeeper | No | |
| Flume | HDFS Sink | 60020 | TCP | Communication from Flume into the Hadoop cluster's HBase Regionserver | No | |
| Flume | All Other Sources and Sinks | Variable | Variable | Ports and protocols used by Flume sources and sinks | No | Refer to the flume configuration file(s) for ports actually in use. Ports in use are specificed using the port keyword in the Flume configuration file. By default Flume configuration files are located in /etc/flume/conf on Linux and c:\hdp\flume-1.4.0.x.y.z\conf on Windows |
