Generally the idea was to provide everything needed for injection by what
current build.xml is having in Common and Hdfs. Would you mind to share what
extra changes you've needed and why?
Cos
On 11/20/09 12:32 , Thanh Do wrote:
Thank you folks!
Finally, I am able (really) to run FI with HADOOP. I added some aspects
into the source code, changed the build.xml, and that's it.
AspectJ is awesome!
Have a nice weekend!
On Fri, Nov 20, 2009 at 1:08 PM, Konstantin Boudnik <c...@yahoo-inc.com
<mailto:c...@yahoo-inc.com>> wrote:
Hi Thanh.
hmm, it sounds like you have some issue with compilation of your code.
addDeprication() has been added to Configuration in 0.21, I believe.
And it is there no matter how do you compile your code (with FI or
without).
Cos
On 11/19/09 10:12 , Thanh Do wrote:
Sorry to dig this thread again!
I am expecting the release of 0.21 so that I don't have to
manually play
around with AspectJ FI any more.
I still have problem with running HDFS with instrumented code
(with aspect).
Here is what I did:
In the root directory of HDFS:
/$ ant injectfaults
$ ant jar-fault-inject
/At this point, i have a jar file containing hdfs classed, namely,
/hadoop-hdfs-0.22.0-dev-fi.jar/, located in /build-fi/ folder.
Now I go to the HADOOP folder (which contains running script in bin
directory), and do the following
/$ ant compile-core-classes/
( now I need additional hdfs classes to be able to run
/start-dfs.sh/ <http://start-dfs.sh/>,
right)
What I did is copying
/$HDFS/build-fi/hadoop-hdfs-0.22.0-dev-fi.jar /to
/$HADOOP/hadoop-hdfs-fi-core.jar/ (I need to add suffix "core"
since the
script will include all hadoop-*-core.jar in classpath)
/$ bin/start-dfs.sh/ <http://start-dfs.sh/>
and got error message:
2009-11-19 11:52:57,479 ERROR
org.apache.hadoop.hdfs.server.namenode.NameNode:
java.lang.NoSuchMethodError:
org.apache.hadoop.conf.Configuration.addDeprecation(Ljava/lang/String;[Ljava/lang/String;)V
at
org.apache.hadoop.hdfs.HdfsConfiguration.deprecate(HdfsConfiguration.java:44)
at
org.apache.hadoop.hdfs.HdfsConfiguration.addDeprecatedKeys(HdfsConfiguration.java:48)
at
org.apache.hadoop.hdfs.HdfsConfiguration.<clinit>(HdfsConfiguration.java:28)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.createNameNode(NameNode.java:1169)
at
org.apache.hadoop.hdfs.server.namenode.NameNode.main(NameNode.java:1199)
2009-11-19 11:52:57,480 INFO
org.apache.hadoop.hdfs.server.namenode.NameNode: SHUTDOWN_MSG:
Could any one tell me how to solve this problem?
Thank you so much.
On Thu, Oct 8, 2009 at 10:41 AM, Konstantin Boudnik
<c...@yahoo-inc.com <mailto:c...@yahoo-inc.com>
<mailto:c...@yahoo-inc.com <mailto:c...@yahoo-inc.com>>> wrote:
Thanks for looking into fault injection - it's very
interesting and
useful technique based on AspectJ.
Currently, it is fully integrated into HDFS only. There's a JIRA
(HADOOP-6204) which tracks the same effort for Common and
then all
Hadoop's components will have injection (as well as fault
injection)
in place. This JIRA should be committed in the matter of a
couple of
weeks.
For the immediate purpose you don't need to patch anything
or do any
tweaking of the code: the fault injection framework is in
already
and ready to work.
For your current needs: to be able to run HDFS with instrumented
code you need to run a special build. To do so:
- % ant injectfaults - similar to a 'normal' build, but does
instrument the code with aspects located under src/test/aop/**
- % ant jar-fault-inject - similar to a 'normal' jar
creation but
instrumented
- % ant jar-test-fault-inject - similar to a 'normal' jar-test
creation but instrumented
Now, if you have the rest of sub-projects built you need to
move the
instrumented jar files on top of the 'normal' files in your
installation directory. Please note that some renaming has to be
done: injected jar files have '-fi' suffix in their names
and normal
jar files don't have such. Thus currently you'll have to rename
those injected jars to pretend like they are normal, used by
configured's classpath.
At this point you all set: you have a production quality
Hadoop with
injected HDFS. As soon as the aforementioned JIRA is ready and
committed we'd be able to provide Hadoop-injected version by the
build's means rather than doing any renaming and manual
intervention.
Also, if you need to read more about fault injection (FI) in
HDFS
you can find FI-framework documentation in the current HDFS
trunk
(it isn't on the web yet for version 0.21 hasn't been
released yet).
Because building documentation requires some extra effort and
additional software to be installed, you can simply download and
read the PDF from this FI-framework JIRA
https://issues.apache.org/jira/secure/attachment/12414225/Fault+injection+development+guide+and+Framework+HowTo.pdf
Hope it helps,
Cos
On 10/8/09 8:10 AM, Thanh Do wrote:
Thank you so much, Jakob.
Could you please explain the fault injection running
procedure
in details?
My goal is running HDFS in a cluster (with a namenode
and several
datanode), and see how fault injection techniques affect
HDFS
behavior's. Also, I would like to define some new
aspects/fault
to test
the system.
What I did was:
1) I checked out the hadoop-common-trunk, but this
package doesn't
contain HDFS classes. I finally noticed that FI framework is
currently
integrated with HDFS only.
2) So, I checked out the hdfs-trunk. The build.xml contain
injectfaults
target and several other related things. I was able to
build those
targets (injectfaults, run-test-hdfs-fault-inject, etc).
Up to this
point, I stucked because I found no scripted that help me to
start-dfs,
stop-dfs...
I copied the bin folder from common/core to HDFS project
folder
and ran
the script:
/bin/start-dfs.sh/ <http://start-dfs.sh/>
<http://start-dfs.sh/>
but there is exception:
/Exception in thread
main"Java.lang.NoClassDefFoundError
: org/apache/commons/logging/LogFactory
/
I guess the reason is I ran HDFS without any common
class. How I get
around this?
3) I also tried the third way, by download the hadoop
release
(contain
everything: core, hdfs, mapred), and used Eclipse to create
project from
existing code. I was able to build this project. The bin
scripts
worked
well but I found know FI related classes. What I did was
apply
the patch
(HADOOP-6003.patch) using Eclipse patch command (Team |
apply
patch),
but I failed the patching procedure.
In summary, I would like to run a real HDFS with fault
injection. I am
not very familiar with ant. Could you please show me
some more
details,
so that I could get around this?
On Thu, Oct 8, 2009 at 12:19 AM, Jakob Homan
<jho...@yahoo-inc.com <mailto:jho...@yahoo-inc.com>
<mailto:jho...@yahoo-inc.com <mailto:jho...@yahoo-inc.com>>
<mailto:jho...@yahoo-inc.com <mailto:jho...@yahoo-inc.com>
<mailto:jho...@yahoo-inc.com <mailto:jho...@yahoo-inc.com>>>> wrote:
Thanh-
If you would like the run execute the tests that
have been
instrumented to use the fault injection framework
the ant
target is
run-test-hdfs-fault-inject. These were used
extensively in the
recent append work and there are quite a few
append-related
tests.
Was there something more specific you were looking
for?
Thanks,
Jakob
Hadoop at Yahoo!
Thanh Do wrote:
Hi everyone,
Could any body so me how to run the fault injection
framework
mentioned in the following links?:
http://issues.apache.org/jira/browse/HDFS-435
and
https://issues.apache.org/jira/browse/HDFS-436
Thanks,
Thanh
--
T
--
With best regards,
Konstantin Boudnik (aka Cos)
Yahoo! Grid Computing
+1 (408) 349-4049
2CAC 8312 4870 D885 8616 6115 220F 6980 1F27 E622
Attention! Streams of consciousness are disallowed
--
thanh
--
thanh
