Package org.apache.hadoop.hdfs.server.namenode.ha
package org.apache.hadoop.hdfs.server.namenode.ha
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ClassDescriptionActive state of the namenode.Tool which allows the standby node's storage directories to be bootstrapped by copying the latest namespace snapshot from the active namenode.EditLogTailer represents a thread which periodically reads from edits journals and applies the transactions contained within to a given FSNamesystem.Context that is to be used by
HAStatefor getting/setting the current state and performing required operations.Namenode base state to implement state machine pattern.Information about a single remote NameNodeThread which runs inside the NN when it's in Standby state, periodically waking up to take a checkpoint of the namespace.Namenode standby state.