Update java documentation

ziquan · web-flow · commit 9cc829d2ce20 · 2020-04-28T15:35:56.000-04:00
Update documentation to provide visibility on how to configure JMX metrics for Java tracer based on reading implementation [here](https://github.com/DataDog/dd-trace-java/blob/6bf1e159b0b919cf09880f2093c2f12c392c120b/dd-java-agent/agent-jmxfetch/src/main/java/datadog/trace/agent/jmxfetch/JMXFetch.java#L130)
diff --git a/content/en/tracing/setup/java.md b/content/en/tracing/setup/java.md
@@ -226,8 +226,8 @@ The tracer is configured using System Properties and Environment Variables as fo
 | `dd.jmxfetch.config`                   | `DD_JMXFETCH_CONFIG`                   | `null`                            | (Example: `activemq.d/conf.yaml,jmx.d/conf.yaml`) Additional metrics configuration file for JMX metrics collection. The Java Agent looks for `jvm_direct:true` in the `instance` section in the `yaml` file to change configuration.                                  |
 | `dd.jmxfetch.check-period`             | `DD_JMXFETCH_CHECK_PERIOD`             | `1500`                            | How often to send JMX metrics (in ms).                                                                                                   |
 | `dd.jmxfetch.refresh-beans-period`     | `DD_JMXFETCH_REFRESH_BEANS_PERIOD`     | `600`                             | How often to refresh list of avalable JMX beans (in seconds).                                                                             |
-| `dd.jmxfetch.statsd.host`              | `DD_JMXFETCH_STATSD_HOST`              | same as `agent.host`              | Statsd host to send JMX metrics to.                                                                                                            |
-| `dd.jmxfetch.statsd.port`              | `DD_JMXFETCH_STATSD_PORT`              | 8125                              | Statsd port to send JMX metrics to.                                                                                                                                                                                                                               |
+| `dd.jmxfetch.statsd.host`              | `DD_JMXFETCH_STATSD_HOST`              | same as `agent.host`              | Statsd host to send JMX metrics to. If you are using Unix Domain Sockets, use an argument like 'unix://PATH_TO_UDS_SOCKET' example: unix:///var/datadog-agent/dsd.socket                                                                                                            |
+| `dd.jmxfetch.statsd.port`              | `DD_JMXFETCH_STATSD_PORT`              | 8125                              | Statsd port to send JMX metrics to. If you are using Unix Domain Sockets, input 0                                                                                                                                                                                                                              |
 
 **Note**:
 
