Xuze Yang created HDFS-15990:
--------------------------------
Summary: No need to write to sub_section when serialize
SnapshotDiff Section
Key: HDFS-15990
URL: https://issues.apache.org/jira/browse/HDFS-15990
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs
Affects Versions: 2.10.0
Reporter: Xuze Yang
In FSImageFormatPBSnapshot.serializeSnapshotDiffSection(), the following code
exists:
{quote}if (i % parent.getInodesPerSubSection() == 0) {
parent.commitSubSection(headers,
FSImageFormatProtobuf.SectionName.SNAPSHOT_DIFF_SUB);
}
{quote}
It aims to serialize SnapshotDiff information into several sub_sections(i.e.
additional sub_sections information will be written to FileSummary Section).
But in FSImageFormatPBSnapshot.loadSnapshotDiffSection(), it treats
SnapshotDiffSection as a whole, rather than several sub_sections. So it's no
need to introduce sub_sections here.
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