Public

<init>

Called at startup, to verify if snapshot operation is supported, and to avoid
starting the master if

checkSnapshotSupport

Check to see if there is a snapshot in progress with the same name or on the
same table. Currently w

isTakingSnapshot

Clone the specified snapshot into a new table. The operation will fail if the
destination table has 

cloneSnapshot

deleteSnapshot

Gets the list of all completed snapshots.

getCompletedSnapshots

getCoordinator

Returns status of a restore request, specifically comparing source snapshot and
target table names. 

isRestoringTable

Check to see if the snapshot is one of the currently completed snapshots Returns
true if the snapsho

isSnapshotCompleted

isSnapshotDone

Check to make sure that we are OK to run the passed snapshot. Checks to make
sure that we aren't alr

prepareToTakeSnapshot

Cleans up any snapshots in the snapshot/.tmp directory that were left from
failed snapshot attempts.

resetTempDir

Restore the specified snapshot. The restore will fail if the destination table
has a snapshot or res

restoreSnapshot

snapshotDisabledTable

snapshotEnabledTable

Take a snapshot based on the enabled/disabled state of the table.

takeSnapshot

Remove the sentinels that are marked as finished and the completion time has
exceeded the removal ti

cleanupSentinels

isTakingAnySnapshot

Return the handler if it is currently live and has the same snapshot target
name. The handler is rem

removeSentinelIfFinished

Take a snapshot using the specified handler. On failure the snapshot temporary
working directory is 

snapshotTable

Connection

Making http post requests using okhttp

Thrown when a file specified by a program cannot be found.

java.io.FileNotFoundException

This class contains various methods for manipulating arrays (such as sorting and
searching). This cl

java.util.Arrays

A Comparator is used to compare two objects to determine their ordering with
respect to each other. 

java.util.Comparator

LinkedHashMap is an implementation of Map that guarantees iteration order. All
optional operations a

java.util.LinkedHashMap

javax.swing.JButton

The org.slf4j.Logger interface is the main user entry point of SLF4J API. It is
expected that loggin

org.slf4j.Logger

requestLocationUpdates

addToBackStack

onRequestPermissionsResult

/**
   * Check if the specified snapshot is done
   *
   * @param expected
   * @return true if snapshot is ready to be restored, false if it is still being taken.
   * @throws IOException IOException if error from HDFS or RPC
   * @throws UnknownSnapshotException if snapshot is invalid or does not exist.
   */

// check the request to make sure it has a snapshot

"No snapshot name passed in request, can't figure out which snapshot you want to check."

// and if the task is complete removes it from the in-progress snapshots map.

// If there's no handler in the in-progress map, it means one of the following:

//   - someone has already requested the snapshot state

//   - the requested snapshot was completed long time ago (cleanupSentinels() timeout)

// In those cases returns to the user the "done state" if the snapshots exists on disk,

// otherwise raise an exception saying that the snapshot is not running and doesn't exist.

" is not currently running or one of the known completed snapshots."

// pass on any failure we find in the sentinel

// Give some procedure info on an exception.

/**
   * Returns the status of a restore operation.
   * If the in-progress restore is failed throws the exception that caused the failure.
   *
   * @param snapshot
   * @return false if in progress, true if restore is completed or not requested.
   * @throws IOException if there was a failure during the restore
   */

// and if the task is complete removes it from the in-progress restore map.

// there is no sentinel so restore is not in progress.

// If the restore is failed, rethrow the exception

"Sentinel is not yet finished with restoring snapshot="

How to use removeSentinelIfFinishedmethodin org.apache.hadoop.hbase.master.snapshot.SnapshotManager

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How to use
removeSentinelIfFinished
method
in
org.apache.hadoop.hbase.master.snapshot.SnapshotManager