Monitoring Dropwizard

Support information

To make sure that the Dropwizard sensor is compatible with your current setup, check the following support information sections:

Supported versions and support policy

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The sensor supports all versions of Dropwizard 4.0 and earlier.

The following table shows the latest supported version and support policy:


Technology	Support policy	Latest technology version	Latest supported version
Dropwizard	45 days	5.0.1	5.0.1

For more information about the support policy, see Support strategy for sensors.

Supported tracing

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For this technology, Instana supports tracing. For more information, see Instrumented frameworks and libraries.

Configuring

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For monitoring a subset of metrics by using a regular expression, configure the Dropwizard sensor by using the following configuration. You can also configure custom polling rate by using thepoll_rate configuration.

com.instana.plugin.dropwizard:
  poll_rate: 1 # Value is in seconds. Default value is 1 second.
  metricsRegex: '<OPTIONAL_REGEX_HERE>'

Note: If you want to use Dropwizard metrics as a general-purpose metrics library (outside of the Dropwizard framework), see Custom JVM metrics monitoring. Dropwizard instrumentation depends on the Dropwizard API, which is called regularly because of dynamic attachment. If the application code initializes Dropwizard before the attachment, metrics are not captured until the Dropwizard API is called again.

Configuring the polling rate

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Note: Instana Dropwizard sensor 1.1.34 and later support configuring the polling rate to reduce data ingestion. This feature is supported on self-hosted Instana backend 311 and later.

You can configure how often Instana polls Dropwizard to collect data and metrics by using the poll_rate parameter in the agent configuration.yaml file as shown in the following example:

com.instana.plugin.dropwizard:
  poll_rate: 1 # values are in seconds. Default value is 1 second.

Tracked Configuration

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Application name
Dropwizard version

Metrics

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The sensor collects all core metric types, up to 3000 metrics in total:

Counters
Gauges
Histograms
Meters
Timers

Custom Metrics

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Custom metrics are automatically ingested and displayed on the Dropwizard dashboard.

Note: If the Dropwizard metrics library is used without the framework, custom metrics will show up on the JVM dashboard.

Health Checks

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Instana agent performs Dropwizard health checks every 20 seconds. Failing health checks are subsequently reported in the form of issues.

How failing health checks are presented within Instana