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https://issues.apache.org/jira/browse/HDFS-1936?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Suresh Srinivas updated HDFS-1936:
----------------------------------
Attachment: HDFS-1936.3.patch
Changes:
# LayoutVersion.java is added to provide:
#* Cleaner check instead of comparing layout versions. Every feature that
changes layout version is added to the list of features, with the corresponding
layout version. In case a layout version does not have immediate predecessor as
the ancestor, a different ancestor can be added.
#* Only the layout versions starting from -16 is added. One could add all the
other layout versions. But that could happen in another jira.
#* Changed all the code that compares layout versions, starting from -16, to
check if a feature is supported.
#* In case of editlogs, there is no need to check for the layout version before
processing an opcode. Either the current software understands it or not.
# TestDFSUpgraeFromImage now tests upgrade from 0.22 image. I have commented
this test. Once the first hudson test runs fine, I will check in the 0.22 image
first and then run the hudson tests again.
> Updating the layout version from HDFS-1822 causes upgrade problems.
> -------------------------------------------------------------------
>
> Key: HDFS-1936
> URL: https://issues.apache.org/jira/browse/HDFS-1936
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.22.0, 0.23.0
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
> Priority: Blocker
> Fix For: 0.22.0, 0.23.0
>
> Attachments: HDFS-1936.1.patch, HDFS-1936.2.patch,
> HDFS-1936.22.patch, HDFS-1936.3.patch, HDFS-1936.trunk.patch,
> hadoop-22-dfs-dir.tgz, hdfs-1936-with-testcase.txt
>
>
> In HDFS-1822 and HDFS-1842, the layout versions for 203, 204, 22 and trunk
> were changed. Some of the namenode logic that depends on layout version is
> broken because of this. Read the comment for more description.
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