internal HeartbeatManager(Namesystem namesystem, BlockManager blockManager, Configuration
conf)
{
heartbeatThread = new Daemon(new HeartbeatManager.Monitor(this));
this.namesystem = namesystem;
this.blockManager = blockManager;
bool avoidStaleDataNodesForWrite = conf.GetBoolean(DFSConfigKeys.DfsNamenodeAvoidStaleDatanodeForWriteKey
, DFSConfigKeys.DfsNamenodeAvoidStaleDatanodeForWriteDefault);
long recheckInterval = conf.GetInt(DFSConfigKeys.DfsNamenodeHeartbeatRecheckIntervalKey
, DFSConfigKeys.DfsNamenodeHeartbeatRecheckIntervalDefault);
// 5 min
long staleInterval = conf.GetLong(DFSConfigKeys.DfsNamenodeStaleDatanodeIntervalKey
, DFSConfigKeys.DfsNamenodeStaleDatanodeIntervalDefault);
// 30s
if (avoidStaleDataNodesForWrite && staleInterval < recheckInterval)
{
this.heartbeatRecheckInterval = staleInterval;
Log.Info("Setting heartbeat recheck interval to " + staleInterval + " since " + DFSConfigKeys
.DfsNamenodeStaleDatanodeIntervalKey + " is less than " + DFSConfigKeys.DfsNamenodeHeartbeatRecheckIntervalKey
);
}
else
{
this.heartbeatRecheckInterval = recheckInterval;
}
}
internal DecommissionManager(Namesystem namesystem, BlockManager blockManager, HeartbeatManager
hbManager)
{
this.namesystem = namesystem;
this.blockManager = blockManager;
this.hbManager = hbManager;
executor = Executors.NewScheduledThreadPool(1, new ThreadFactoryBuilder().SetNameFormat
("DecommissionMonitor-%d").SetDaemon(true).Build());
decomNodeBlocks = new SortedDictionary <DatanodeDescriptor, AbstractList <BlockInfoContiguous
> >();
pendingNodes = new List <DatanodeDescriptor>();
}
