/// <summary>This is called when using bootstrapStandby for HA upgrade.</summary>
/// <remarks>
/// This is called when using bootstrapStandby for HA upgrade. The SBN should
/// also create previous directory so that later when it starts, it understands
/// that the cluster is in the upgrade state. This function renames the old
/// current directory to previous.tmp.
/// </remarks>
/// <exception cref="System.IO.IOException"/>
private bool DoPreUpgrade(NNStorage storage, NamespaceInfo nsInfo)
{
bool isFormatted = false;
IDictionary <Storage.StorageDirectory, Storage.StorageState> dataDirStates = new Dictionary
<Storage.StorageDirectory, Storage.StorageState>();
try
{
isFormatted = FSImage.RecoverStorageDirs(HdfsServerConstants.StartupOption.Upgrade
, storage, dataDirStates);
if (dataDirStates.Values.Contains(Storage.StorageState.NotFormatted))
{
// recoverStorageDirs returns true if there is a formatted directory
isFormatted = false;
System.Console.Error.WriteLine("The original storage directory is not formatted."
);
}
}
catch (InconsistentFSStateException e)
{
// if the storage is in a bad state,
Log.Warn("The storage directory is in an inconsistent state", e);
}
finally
{
storage.UnlockAll();
}
// if there is InconsistentFSStateException or the storage is not formatted,
// format the storage. Although this format is done through the new
// software, since in HA setup the SBN is rolled back through
// "-bootstrapStandby", we should still be fine.
if (!isFormatted && !Format(storage, nsInfo))
{
return(false);
}
// make sure there is no previous directory
FSImage.CheckUpgrade(storage);
// Do preUpgrade for each directory
for (IEnumerator <Storage.StorageDirectory> it = storage.DirIterator(false); it.HasNext
();)
{
Storage.StorageDirectory sd = it.Next();
try
{
NNUpgradeUtil.RenameCurToTmp(sd);
}
catch (IOException e)
{
Log.Error("Failed to move aside pre-upgrade storage " + "in image directory " + sd
.GetRoot(), e);
throw;
}
}
storage.SetStorageInfo(nsInfo);
storage.SetBlockPoolID(nsInfo.GetBlockPoolID());
return(true);
}