private void DeleteReplica(ReplicaInfo replicaToDelete)
{
// Delete the files on disk. Failure here is okay.
FilePath blockFile = replicaToDelete.GetBlockFile();
if (!blockFile.Delete())
{
Log.Warn("Failed to delete block file " + blockFile);
}
FilePath metaFile = replicaToDelete.GetMetaFile();
if (!metaFile.Delete())
{
Log.Warn("Failed to delete meta file " + metaFile);
}
}
internal static ReplicaInfo SelectReplicaToDelete(ReplicaInfo replica1, ReplicaInfo
replica2)
{
ReplicaInfo replicaToKeep;
ReplicaInfo replicaToDelete;
// it's the same block so don't ever delete it, even if GS or size
// differs. caller should keep the one it just discovered on disk
if (replica1.GetBlockFile().Equals(replica2.GetBlockFile()))
{
return(null);
}
if (replica1.GetGenerationStamp() != replica2.GetGenerationStamp())
{
replicaToKeep = replica1.GetGenerationStamp() > replica2.GetGenerationStamp() ? replica1
: replica2;
}
else
{
if (replica1.GetNumBytes() != replica2.GetNumBytes())
{
replicaToKeep = replica1.GetNumBytes() > replica2.GetNumBytes() ? replica1 : replica2;
}
else
{
if (replica1.GetVolume().IsTransientStorage() && !replica2.GetVolume().IsTransientStorage
())
{
replicaToKeep = replica2;
}
else
{
replicaToKeep = replica1;
}
}
}
replicaToDelete = (replicaToKeep == replica1) ? replica2 : replica1;
if (Log.IsDebugEnabled())
{
Log.Debug("resolveDuplicateReplicas decide to keep " + replicaToKeep + ". Will try to delete "
+ replicaToDelete);
}
return(replicaToDelete);
}
/// <exception cref="System.IO.IOException"/>
private static void CreateUnlinkTmpFile(ReplicaInfo replicaInfo, bool changeBlockFile
, bool isRename)
{
FilePath src;
if (changeBlockFile)
{
src = replicaInfo.GetBlockFile();
}
else
{
src = replicaInfo.GetMetaFile();
}
FilePath dst = DatanodeUtil.GetUnlinkTmpFile(src);
if (isRename)
{
src.RenameTo(dst);
}
else
{
FileInputStream @in = new FileInputStream(src);
try
{
FileOutputStream @out = new FileOutputStream(dst);
try
{
IOUtils.CopyBytes(@in, @out, 1);
}
finally
{
@out.Close();
}
}
finally
{
@in.Close();
}
}
}
