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https://issues.apache.org/jira/browse/HDFS-12828?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16437851#comment-16437851
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Erik Krogen commented on HDFS-12828:
------------------------------------

Unit test failures look unrelated...

> OIV ReverseXML Processor Fails With Escaped Characters
> ------------------------------------------------------
>
>                 Key: HDFS-12828
>                 URL: https://issues.apache.org/jira/browse/HDFS-12828
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs
>    Affects Versions: 2.8.0
>            Reporter: Erik Krogen
>            Assignee: Erik Krogen
>            Priority: Major
>         Attachments: HDFS-12828.000.patch, fsimage_0000000000000000008.xml
>
>
> The HDFS OIV ReverseXML processor fails if the XML file contains escaped 
> characters:
> {code}
> ekrogen at ekrogen-ld1 in 
> ~/dev/hadoop/trunk/hadoop-dist/target/hadoop-3.0.0-beta1-SNAPSHOT on trunk!
> ± $HADOOP_HOME/bin/hdfs dfs -fs hdfs://localhost:9000/ -ls /
> Found 4 items
> drwxr-xr-x   - ekrogen supergroup          0 2017-11-16 14:48 /foo
> drwxr-xr-x   - ekrogen supergroup          0 2017-11-16 14:49 /foo"
> drwxr-xr-x   - ekrogen supergroup          0 2017-11-16 14:50 /foo`
> drwxr-xr-x   - ekrogen supergroup          0 2017-11-16 14:49 /foo&
> {code}
> Then after doing {{saveNamespace}} on that NameNode...
> {code}
> ekrogen at ekrogen-ld1 in 
> ~/dev/hadoop/trunk/hadoop-dist/target/hadoop-3.0.0-beta1-SNAPSHOT on trunk!
> ± $HADOOP_HOME/bin/hdfs oiv -i 
> /tmp/hadoop-ekrogen/dfs/name/current/fsimage_0000000000000000008 -o 
> /tmp/hadoop-ekrogen/dfs/name/current/fsimage_0000000000000000008.xml -p XML
> ekrogen at ekrogen-ld1 in 
> ~/dev/hadoop/trunk/hadoop-dist/target/hadoop-3.0.0-beta1-SNAPSHOT on trunk!
> ± $HADOOP_HOME/bin/hdfs oiv -i 
> /tmp/hadoop-ekrogen/dfs/name/current/fsimage_0000000000000000008.xml -o 
> /tmp/hadoop-ekrogen/dfs/name/current/fsimage_0000000000000000008.xml.rev -p 
> ReverseXML
> OfflineImageReconstructor failed: unterminated entity ref starting with &
> org.apache.hadoop.hdfs.util.XMLUtils$UnmanglingError: unterminated entity ref 
> starting with &
>         at 
> org.apache.hadoop.hdfs.util.XMLUtils.unmangleXmlString(XMLUtils.java:232)
>         at 
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.loadNodeChildrenHelper(OfflineImageReconstructor.java:383)
>         at 
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.loadNodeChildrenHelper(OfflineImageReconstructor.java:379)
>         at 
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.loadNodeChildren(OfflineImageReconstructor.java:418)
>         at 
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.access$1000(OfflineImageReconstructor.java:95)
>         at 
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor$INodeSectionProcessor.process(OfflineImageReconstructor.java:524)
>         at 
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.processXml(OfflineImageReconstructor.java:1710)
>         at 
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageReconstructor.run(OfflineImageReconstructor.java:1765)
>         at 
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewerPB.run(OfflineImageViewerPB.java:191)
>         at 
> org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewerPB.main(OfflineImageViewerPB.java:134)
> {code}
> See attachments for relevant fsimage XML file.



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