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https://issues.apache.org/jira/browse/HDFS-1448?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12934099#action_12934099
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Erik Steffl commented on HDFS-1448:
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HDFS-1448-0.22-3.patch implements changes suggested in review
https://issues.apache.org/jira/browse/HDFS-1448?focusedCommentId=12931182&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#action_12931182
Few notes:
XmlTokenizer.java public Token read(Token t): documented rationale in
Tokenizer.java
TestOfflineEditsViewer.java Nit: Line 174, save a few characters with a while
loop: function changed a bit, don't think it applies now
> Create multi-format parser for edits logs file, support binary and XML
> formats initially
> ----------------------------------------------------------------------------------------
>
> Key: HDFS-1448
> URL: https://issues.apache.org/jira/browse/HDFS-1448
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: tools
> Affects Versions: 0.22.0
> Reporter: Erik Steffl
> Assignee: Erik Steffl
> Fix For: 0.22.0
>
> Attachments: editsStored, HDFS-1448-0.22-1.patch,
> HDFS-1448-0.22-2.patch, HDFS-1448-0.22-3.patch, HDFS-1448-0.22.patch, Viewer
> hierarchy.pdf
>
>
> Create multi-format parser for edits logs file, support binary and XML
> formats initially.
> Parsing should work from any supported format to any other supported format
> (e.g. from binary to XML and from XML to binary).
> The binary format is the format used by FSEditLog class to read/write edits
> file.
> Primary reason to develop this tool is to help with troubleshooting, the
> binary format is hard to read and edit (for human troubleshooters).
> Longer term it could be used to clean up and minimize parsers for fsimage and
> edits files. Edits parser OfflineEditsViewer is written in a very similar
> fashion to OfflineImageViewer. Next step would be to merge OfflineImageViewer
> and OfflineEditsViewer and use the result in both FSImage and FSEditLog. This
> is subject to change, specifically depending on adoption of avro (which would
> completely change how objects are serialized as well as provide ways to
> convert files to different formats).
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