/// <summary>
/// Periodically check in with the namenode and renew all the leases
/// when the lease period is half over.
/// </summary>
/// <exception cref="System.Exception"/>
private void Run(int id)
{
for (long lastRenewed = Time.MonotonicNow(); !Sharpen.Thread.Interrupted(); Sharpen.Thread
.Sleep(GetSleepPeriod()))
{
long elapsed = Time.MonotonicNow() - lastRenewed;
if (elapsed >= GetRenewalTime())
{
try
{
Renew();
if (Log.IsDebugEnabled())
{
Log.Debug("Lease renewer daemon for " + ClientsString() + " with renew id " + id
+ " executed");
}
lastRenewed = Time.MonotonicNow();
}
catch (SocketTimeoutException ie)
{
Log.Warn("Failed to renew lease for " + ClientsString() + " for " + (elapsed / 1000
) + " seconds. Aborting ...", ie);
lock (this)
{
while (!dfsclients.IsEmpty())
{
DFSClient dfsClient = dfsclients[0];
dfsClient.CloseAllFilesBeingWritten(true);
CloseClient(dfsClient);
}
//Expire the current LeaseRenewer thread.
emptyTime = 0;
}
break;
}
catch (IOException ie)
{
Log.Warn("Failed to renew lease for " + ClientsString() + " for " + (elapsed / 1000
) + " seconds. Will retry shortly ...", ie);
}
}
lock (this)
{
if (id != currentId || IsRenewerExpired())
{
if (Log.IsDebugEnabled())
{
if (id != currentId)
{
Log.Debug("Lease renewer daemon for " + ClientsString() + " with renew id " + id
+ " is not current");
}
else
{
Log.Debug("Lease renewer daemon for " + ClientsString() + " with renew id " + id
+ " expired");
}
}
//no longer the current daemon or expired
return;
}
// if no clients are in running state or there is no more clients
// registered with this renewer, stop the daemon after the grace
// period.
if (!ClientsRunning() && emptyTime == long.MaxValue)
{
emptyTime = Time.MonotonicNow();
}
}
}
}
