Groovy

Summary

This reporting task can be used to issue SQL queries against various NiFi metrics information, modeled as tables, and transmit the query results to some specified destination. The query may make use of the CONNECTION_STATUS, PROCESSOR_STATUS, BULLETINS, PROCESS_GROUP_STATUS, JVM_METRICS, CONNECTION_STATUS_PREDICTIONS, or PROVENANCE tables, and can use any functions or capabilities provided by Apache Calcite, including JOINs, aggregate functions, etc.

The results are transmitted to the destination using the configured Record Sink service, such as SiteToSiteReportingRecordSink (for sending via the Site-to-Site protocol) or DatabaseRecordSink (for sending the query result rows to an relational database).

Table Definitions

Below is a list of definitions for all the "tables" supported by this reporting task. Note that these are not persistent/materialized tables, rather they are non-materialized views for which the sources are re-queried at every execution. This means that a query executed twice may return different results, for example if new status information is available, or in the case of JVM_METRICS (for example), a new snapshot of the JVM at query-time.

CONNECTION_STATUS

Column	Data Type
id	String
groupId	String
name	String
sourceId	String
sourceName	String
destinationId	String
destinationName	String
backPressureDataSizeThreshold	String
backPressureBytesThreshold	long
backPressureObjectThreshold	long
isBackPressureEnabled	boolean
inputCount	int
inputBytes	long
queuedCount	int
queuedBytes	long
outputCount	int
outputBytes	long
maxQueuedCount	int
maxQueuedBytes	long

PROCESSOR_STATUS

Column	Data Type
id	String
groupId	String
name	String
processorType	String
averageLineageDuration	long
bytesRead	long
bytesWritten	long
bytesReceived	long
bytesSent	long
flowFilesRemoved	int
flowFilesReceived	int
flowFilesSent	int
inputCount	int
inputBytes	long
outputCount	int
outputBytes	long
activeThreadCount	int
terminatedThreadCount	int
invocations	int
processingNanos	long
runStatus	String
executionNode	String

BULLETINS

Column	Data Type
bulletinId	long
bulletinCategory	String
bulletinGroupId	String
bulletinGroupName	String
bulletinGroupPath	String
bulletinLevel	String
bulletinMessage	String
bulletinNodeAddress	String
bulletinNodeId	String
bulletinSourceId	String
bulletinSourceName	String
bulletinSourceType	String
bulletinTimestamp	Date

PROCESS_GROUP_STATUS

Column	Data Type
id	String
groupId	String
name	String
bytesRead	long
bytesWritten	long
bytesReceived	long
bytesSent	long
bytesTransferred	long
flowFilesReceived	int
flowFilesSent	int
flowFilesTransferred	int
inputContentSize	long
inputCount	int
outputContentSize	long
outputCount	int
queuedContentSize	long
activeThreadCount	int
terminatedThreadCount	int
queuedCount	int
versionedFlowState	String

JVM_METRICS

The JVM_METRICS table has dynamic columns in the sense that the "garbage collector runs" and "garbage collector time columns" appear for each Java garbage collector in the JVM.
The column names end with the name of the garbage collector substituted for the <garbage_collector_name> expression below:

Column	Data Type
jvm_daemon_thread_count	int
jvm_thread_count	int
jvm_thread_states_blocked	int
jvm_thread_states_runnable	int
jvm_thread_states_terminated	int
jvm_thread_states_timed_waiting	int
jvm_uptime	long
jvm_head_used	double
jvm_heap_usage	double
jvm_non_heap_usage	double
jvm_file_descriptor_usage	double
jvm_gc_runs_`<garbage_collector_name>`	long
jvm_gc_time_`<garbage_collector_name>`	long

CONNECTION_STATUS_PREDICTIONS

Column	Data Type
connectionId	String
predictedQueuedBytes	long
predictedQueuedCount	int
predictedPercentBytes	int
predictedPercentCount	int
predictedTimeToBytesBackpressureMillis	long
predictedTimeToCountBackpressureMillis	long
predictionIntervalMillis	long

PROVENANCE

Column	Data Type
eventId	long
eventType	String
timestampMillis	long
durationMillis	long
lineageStart	long
details	String
componentId	String
componentName	String
componentType	String
processGroupId	String
processGroupName	String
entityId	String
entityType	String
entitySize	long
previousEntitySize	long
updatedAttributes	Map<String,String>
previousAttributes	Map<String,String>
contentPath	String
previousContentPath	String
parentIds	Array<String>
childIds	Array<String>
transitUri	String
remoteIdentifier	String
alternateIdentifier	String

SQL Query Examples

Example: Select all fields from the CONNECTION_STATUS table:

SELECT * FROM CONNECTION_STATUS

Example: Select connection IDs where time-to-backpressure (based on queue count) is less than 5 minutes:

SELECT connectionId FROM CONNECTION_STATUS_PREDICTIONS WHERE predictedTimeToCountBackpressureMillis < 300000

Example: Get the unique bulletin categories associated with errors:

SELECT DISTINCT(bulletinCategory) FROM BULLETINS WHERE bulletinLevel = "ERROR"