/// <exception cref="System.IO.IOException"/>
private void SaveNameSystemSection(FsImageProto.FileSummary.Builder summary)
{
FSNamesystem fsn = context.GetSourceNamesystem();
OutputStream @out = sectionOutputStream;
BlockIdManager blockIdManager = fsn.GetBlockIdManager();
FsImageProto.NameSystemSection.Builder b = FsImageProto.NameSystemSection.NewBuilder
().SetGenstampV1(blockIdManager.GetGenerationStampV1()).SetGenstampV1Limit(blockIdManager
.GetGenerationStampV1Limit()).SetGenstampV2(blockIdManager.GetGenerationStampV2(
)).SetLastAllocatedBlockId(blockIdManager.GetLastAllocatedBlockId()).SetTransactionId
(context.GetTxId());
// We use the non-locked version of getNamespaceInfo here since
// the coordinating thread of saveNamespace already has read-locked
// the namespace for us. If we attempt to take another readlock
// from the actual saver thread, there's a potential of a
// fairness-related deadlock. See the comments on HDFS-2223.
b.SetNamespaceId(fsn.UnprotectedGetNamespaceInfo().GetNamespaceID());
if (fsn.IsRollingUpgrade())
{
b.SetRollingUpgradeStartTime(fsn.GetRollingUpgradeInfo().GetStartTime());
}
FsImageProto.NameSystemSection s = ((FsImageProto.NameSystemSection)b.Build());
s.WriteDelimitedTo(@out);
CommitSection(summary, FSImageFormatProtobuf.SectionName.NsInfo);
}
/// <exception cref="System.IO.IOException"/>
private void DumpNameSection(InputStream @in)
{
FsImageProto.NameSystemSection s = FsImageProto.NameSystemSection.ParseDelimitedFrom
(@in);
@out.Write("<NameSection>\n");
O("genstampV1", s.GetGenstampV1()).O("genstampV2", s.GetGenstampV2()).O("genstampV1Limit"
, s.GetGenstampV1Limit()).O("lastAllocatedBlockId", s.GetLastAllocatedBlockId())
.O("txid", s.GetTransactionId());
@out.Write("</NameSection>\n");
}
/// <exception cref="System.IO.IOException"/>
private void LoadNameSystemSection(InputStream @in)
{
FsImageProto.NameSystemSection s = FsImageProto.NameSystemSection.ParseDelimitedFrom
(@in);
BlockIdManager blockIdManager = fsn.GetBlockIdManager();
blockIdManager.SetGenerationStampV1(s.GetGenstampV1());
blockIdManager.SetGenerationStampV2(s.GetGenstampV2());
blockIdManager.SetGenerationStampV1Limit(s.GetGenstampV1Limit());
blockIdManager.SetLastAllocatedBlockId(s.GetLastAllocatedBlockId());
imgTxId = s.GetTransactionId();
if (s.HasRollingUpgradeStartTime() && fsn.GetFSImage().HasRollbackFSImage())
{
// we set the rollingUpgradeInfo only when we make sure we have the
// rollback image
fsn.SetRollingUpgradeInfo(true, s.GetRollingUpgradeStartTime());
}
}