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https://issues.apache.org/jira/browse/HADOOP-6003?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Konstantin Boudnik updated HADOOP-6003:
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Fix Version/s: 0.21.0
Affects Version/s: 0.20.0
Status: Patch Available (was: Open)
This patch includes the following additions:
- AspectJ framework (version 1.6.4) is added to the Ivy resolver's configuration
- the implementation of a simple probability calculation and configuration
needed by fault injection
- two aspects for datanode's classes BlockReceiver and FSDataset are created
and tested
It is expected to see unit tests failing with faults in place. We might need to
develop different kind of tests to utilize fault injection in a better way.
The interface of the new framework is as follows:
- ant injectfaults will weave the aspects in place after the normal compilation
of HDFS classes is complete
- ant run-test-hdfs will execute unit tests as usual, but faults will be
injected according to the rules
- ant jar will create Hadoop's jar as usual, but if 'injectfaults' has been
executed before then the jar file will include instrumented classes, e.g. with
fault invocations
The rules of faults injection probability calculation are as follows:
* default probability level is set to 0. Thus even with aspects weaved into the
classes faults won't be injected/executed unless specified explicitly
* to set certain class' faults probability level one needs to specify system
property in the following format
**
{code}
ant run-test-hdfs -Dfault.probability.FSDataset=3
{code}
which will probability of faults injections into FSDataset class at about 3%
> AspectJ framework for HDFS code and tests
> -----------------------------------------
>
> Key: HADOOP-6003
> URL: https://issues.apache.org/jira/browse/HADOOP-6003
> Project: Hadoop Core
> Issue Type: Sub-task
> Affects Versions: 0.20.0
> Reporter: Konstantin Boudnik
> Assignee: Konstantin Boudnik
> Fix For: 0.21.0
>
> Attachments: HADOOP-6003.patch, HADOOP-6003.sh
>
>
> This subtask takes care about HDFS part of Hadoop only. Others will be added
> later as needed: it will include only new aspects development and
> modifications of build.xml file
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