[
https://issues.apache.org/jira/browse/HDFS-14148?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Siyao Meng updated HDFS-14148:
------------------------------
Description:
The current HDFS OIV tool doesn't seem to support snapshot well when reversing
XML back to binary.
{code:bash}
$ hdfs oiv -i fsimage_0000000000000026542.xml -o reverse.bin -p ReverseXML
OfflineImageReconstructor failed: Found unknown XML keys in <dir>: dir
java.io.IOException: Found unknown XML keys in <dir>: dir
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor$Node.verifyNoRemainingKeys(OfflineImageReconstructor.java:324)
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor$SnapshotSectionProcessor.process(OfflineImageReconstructor.java:1357)
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.processXml(OfflineImageReconstructor.java:1785)
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.run(OfflineImageReconstructor.java:1840)
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewerPB.run(OfflineImageViewerPB.java:193)
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewerPB.main(OfflineImageViewerPB.java:136)
$ grep -n "<dir>" fsimage_0000000000000026542.xml
228:<INodeReferenceSection></INodeReferenceSection><SnapshotSection><snapshotCounter>2</snapshotCounter><numSnapshots>2</numSnapshots><snapshottableDir><dir>20492</dir><dir>20495</dir></snapshottableDir>
{code}
This is also reproduced on latest trunk fba222a85603d6321419aa37bcc48d276dd6c4a6
It seems this problem can be easily reproduced when there are at least TWO
snapshot-enabled directories.
{code:title=trunk}
$ hdfs oiv -i 24.xml -o 24.bin -p ReverseXML
OfflineImageReconstructor failed: Found unknown XML keys in <dir>: dir
java.io.IOException: Found unknown XML keys in <dir>: dir
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor$Node.verifyNoRemainingKeys(OfflineImageReconstructor.java:324)
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor$SnapshotSectionProcessor.process(OfflineImageReconstructor.java:1357)
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.processXml(OfflineImageReconstructor.java:1785)
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.run(OfflineImageReconstructor.java:1840)
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewerPB.run(OfflineImageViewerPB.java:211)
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewerPB.main(OfflineImageViewerPB.java:149)
2019-08-10 06:58:04,444 INFO util.ExitUtil: Exiting with status 1: ExitException
{code}
was:
The current HDFS OIV tool doesn't seem to support snapshot well when reversing
XML back to binary.
{code:bash}
$ hdfs oiv -i fsimage_0000000000000026542.xml -o reverse.bin -p ReverseXML
OfflineImageReconstructor failed: Found unknown XML keys in <dir>: dir
java.io.IOException: Found unknown XML keys in <dir>: dir
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor$Node.verifyNoRemainingKeys(OfflineImageReconstructor.java:324)
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor$SnapshotSectionProcessor.process(OfflineImageReconstructor.java:1357)
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.processXml(OfflineImageReconstructor.java:1785)
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.run(OfflineImageReconstructor.java:1840)
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewerPB.run(OfflineImageViewerPB.java:193)
at
org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewerPB.main(OfflineImageViewerPB.java:136)
$ grep -n "<dir>" fsimage_0000000000000026542.xml
228:<INodeReferenceSection></INodeReferenceSection><SnapshotSection><snapshotCounter>2</snapshotCounter><numSnapshots>2</numSnapshots><snapshottableDir><dir>20492</dir><dir>20495</dir></snapshottableDir>
{code}
This is also reproduced on latest trunk fba222a85603d6321419aa37bcc48d276dd6c4a6
It seems this problem can be easily reproduced when there are at least TWO
snapshot-enabled directories.
> HDFS OIV ReverseXML snapshot issue: Found unknown XML keys in <dir>: dir
> ------------------------------------------------------------------------
>
> Key: HDFS-14148
> URL: https://issues.apache.org/jira/browse/HDFS-14148
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs
> Affects Versions: 3.0.0
> Reporter: Siyao Meng
> Assignee: Siyao Meng
> Priority: Major
> Attachments: fsimage_0000000000000000441
>
>
> The current HDFS OIV tool doesn't seem to support snapshot well when
> reversing XML back to binary.
> {code:bash}
> $ hdfs oiv -i fsimage_0000000000000026542.xml -o reverse.bin -p ReverseXML
> OfflineImageReconstructor failed: Found unknown XML keys in <dir>: dir
> java.io.IOException: Found unknown XML keys in <dir>: dir
> at
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor$Node.verifyNoRemainingKeys(OfflineImageReconstructor.java:324)
> at
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor$SnapshotSectionProcessor.process(OfflineImageReconstructor.java:1357)
> at
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.processXml(OfflineImageReconstructor.java:1785)
> at
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.run(OfflineImageReconstructor.java:1840)
> at
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewerPB.run(OfflineImageViewerPB.java:193)
> at
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewerPB.main(OfflineImageViewerPB.java:136)
> $ grep -n "<dir>" fsimage_0000000000000026542.xml
> 228:<INodeReferenceSection></INodeReferenceSection><SnapshotSection><snapshotCounter>2</snapshotCounter><numSnapshots>2</numSnapshots><snapshottableDir><dir>20492</dir><dir>20495</dir></snapshottableDir>
> {code}
> This is also reproduced on latest trunk
> fba222a85603d6321419aa37bcc48d276dd6c4a6
> It seems this problem can be easily reproduced when there are at least TWO
> snapshot-enabled directories.
> {code:title=trunk}
> $ hdfs oiv -i 24.xml -o 24.bin -p ReverseXML
> OfflineImageReconstructor failed: Found unknown XML keys in <dir>: dir
> java.io.IOException: Found unknown XML keys in <dir>: dir
> at
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor$Node.verifyNoRemainingKeys(OfflineImageReconstructor.java:324)
> at
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor$SnapshotSectionProcessor.process(OfflineImageReconstructor.java:1357)
> at
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.processXml(OfflineImageReconstructor.java:1785)
> at
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.run(OfflineImageReconstructor.java:1840)
> at
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewerPB.run(OfflineImageViewerPB.java:211)
> at
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewerPB.main(OfflineImageViewerPB.java:149)
> 2019-08-10 06:58:04,444 INFO util.ExitUtil: Exiting with status 1:
> ExitException
> {code}
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