KillUnusedSegments (druid-server 29.0.1 API)

java.lang.Object
- org.apache.druid.server.coordinator.duty.KillUnusedSegments

All Implemented Interfaces:

CoordinatorDuty
```
public class KillUnusedSegments
extends Object
implements CoordinatorDuty
```
Completely removes information about unused segments who have an interval end that comes before now - durationToRetain from the metadata store. durationToRetain can be a positive or negative duration, negative meaning the interval end target will be in the future. Also, durationToRetain can be ignored if ignoreDurationToRetain is enabled, meaning that there is no upper bound to the end interval of segments that will be killed. The umbrella interval of the unused segments per datasource to be killed is determined by findIntervalForKill(String, DateTime), which takes into account the configured bufferPeriod. However, the kill task needs to check again for max bufferPeriod for the unused segments in the widened interval as there can be multiple unused segments with different used_status_last_updated time.

See org.apache.druid.indexing.common.task.KillUnusedSegmentsTask.

Field Summary

Fields
Modifier and Type	Field	Description
`static com.google.common.base.Predicate<org.apache.druid.indexer.TaskStatusPlus>`	`IS_AUTO_KILL_TASK`
`static String`	`KILL_TASK_TYPE`
`static String`	`TASK_ID_PREFIX`

Constructor Summary

Constructors
Constructor	Description
`KillUnusedSegments(SegmentsMetadataManager segmentsMetadataManager, OverlordClient overlordClient, DruidCoordinatorConfig config)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`DruidCoordinatorRuntimeParams`	`run(DruidCoordinatorRuntimeParams params)`	Implementations of this method run various activities performed by the coordinator.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - KILL_TASK_TYPE
```
public static final String KILL_TASK_TYPE
```
    See Also:
    
    Constant Field Values
  - TASK_ID_PREFIX
```
public static final String TASK_ID_PREFIX
```
    See Also:
    
    Constant Field Values
  - IS_AUTO_KILL_TASK
```
public static final com.google.common.base.Predicate<org.apache.druid.indexer.TaskStatusPlus> IS_AUTO_KILL_TASK
```
- Constructor Detail
  - KillUnusedSegments
```
public KillUnusedSegments(SegmentsMetadataManager segmentsMetadataManager,
                          OverlordClient overlordClient,
                          DruidCoordinatorConfig config)
```
- Method Detail
  - run
```
public DruidCoordinatorRuntimeParams run(DruidCoordinatorRuntimeParams params)
```
    Description copied from interface: CoordinatorDuty
    
    Implementations of this method run various activities performed by the coordinator. Input params can be used and modified. The returned DruidCoordinatorRuntimeParams is passed to the next duty.
    
    Specified by:
    
    run in interface CoordinatorDuty
    
    Returns:
    
    same as input or a modified value to be used by next duty. Null return values will prevent subsequent CoordinatorDuty objects (see the order in the lists passed into the constructor of DruidCoordinator.DutiesRunnable) from running until the next cycle.