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reset-cluster tool

The reset-cluster tool can be used to completely wipe out Apache Druid cluster state stored on Metadata and Deep storage. This is intended to be used in dev/test environments where you typically want to reset the cluster before running the test suite. reset-cluster automatically figures out necessary information from Druid cluster configuration. So the java classpath used in the command must have all the necessary druid configuration files.

It can be run in one of the following ways.

java -classpath "/my/druid/lib/*" -Ddruid.extensions.loadList="[]" org.apache.druid.cli.Main \
  tools reset-cluster \
  [--metadataStore] \
  [--segmentFiles] \
  [--taskLogs] \
  [--hadoopWorkingPath]

or

java -classpath "/my/druid/lib/*" -Ddruid.extensions.loadList="[]" org.apache.druid.cli.Main \
  tools reset-cluster \
  --all

Usage documentation can be printed by running following command.

$ java -classpath "/my/druid/lib/*" -Ddruid.extensions.loadList="[]" org.apache.druid.cli.Main help tools reset-cluster

NAME
        druid tools reset-cluster - Cleanup all persisted state from metadata
        and deep storage.

SYNOPSIS
        druid tools reset-cluster [--all] [--hadoopWorkingPath]
                [--metadataStore] [--segmentFiles] [--taskLogs]

OPTIONS
        --all
            delete all state stored in metadata and deep storage

        --hadoopWorkingPath
            delete hadoopWorkingPath

        --metadataStore
            delete all records in metadata storage

        --segmentFiles
            delete all segment files from deep storage

        --taskLogs
            delete all tasklogs