Transcript Slide - Electronics and Computer Science

COMP3019
Coursework Help
Steve Crouch
[email protected], stc@ecs
School of Electronics and Computer Science
Need Help?
 Coursework resources:
– http://www.ecs.soton.ac.uk/~stc/COMP3019
– Some help pointers on page
 Email: [email protected]
 Due handin date: 27th March 2014 at 4pm
General
 Look out when using VPNs…
– Often a problem when GridSAM connects to
a local FTP server (e.g. GridSAM FTP server)
 If having connecting problems, check & add
temporary firewall exception rules for
GridSAM/FTP ports
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Part 1 – M-grid
 Coursework page mentions we can load text
file into applet by packaging it within jar –
should we:
– Pass single character in as parameter? Or
– Pass both character and text file as
parameters?
 The second one…
 Applet should have two arguments – can pass
in character and text file name, or contents of
text file – first is neater!
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Part II – GridSAM and MapReduce
 Running the remotecat-staging.jsdl
example / 2(a)
Could not connect to FTP server on
"gridsam.lesc.doc.ic.ac.uk
<http://gridsam.lesc.doc.ic.ac.uk>".
– Change <URI></URI> elements to reflect
where your own ftp instance is located
– e.g.
<URI>ftp://anonymous:anonymous@localh
ost:55521/concat.sh</URI>
Part II – GridSAM and MapReduce
 Running the remotecat-staging.jsdl
example / 2(a)
java.net.MalformedURLException
– Copying and pasting from example in
slides won’t work, e.g.
 …the ./gridsam.sh command to run example
 …or just copying the GridSAM URL
– Problem is the quotes around
“https://localhost:8080/gridsam/services/g
ridsam?wsdl”
– Type in manually!
Part II – GridSAM and MapReduce
 2(a)
$ ./GridSAMExampleCompile
Compiling the GridSAM client
example... javac: file not
found: GridSAMExample.java
 Ensure you’ve unpacked the
contents of COMP3019materials.tgz into the omii2.3.0-client directory… and
not into a subdirectory of
that directory
– e.g. download COMP3019materials.tgz
– $ cd gridsam-2.3.0-client
$ tar -xzf COMP3019materials.tgz
Should have the following in the gridsam-2.3.0client directory after unpacking it:
COMP3019-materials.tgz
GridSAMClient.class
GridSAMExample.class
GridSAMExample.java
GridSAMExampleCompile
GridSAMExampleCompile.bat
GridSAMExampleRun
GridSAMExampleRun.bat
LICENCE.txt
MyProxyClient.class
SetupGridSAM.class
conf
demos
endorsed
examples
gridsam.sh
lib
myproxy.sh
Part II – GridSAM and MapReduce
 2(a) Running under Eclipse IDE (probably
more hassle, up to you):
– Exception in thread "main"
org.icenigrid.gridsam.core.SubmissionExce
ption: failed to submit job:
WSDoAllReceiver: Request does not contain
required Security header
– Need to include the gridsam-2.3.0client/conf directory on classpath
– Look at the GridSAMExampleRun script
Part II – GridSAM and MapReduce
 2(a) Exception in thread "main"
org.icenigrid.gridsam.core.SubmissionExce
ption: failed to submit job:
java.net.MalformedURLException: For input
string: "port“
– Need to modify the GridSAMExampleRun
script to point to the GridSAM service and
your client FTP server
– Essentially change the ftp.server and
gridsam.server properties
Part II – GridSAM and MapReduce
 2(a) With GridSAM FTP server:
– Exception in thread "main"
java.lang.NoClassDefFoundError: Systems Caused by:
java.lang.ClassNotFoundException: Systems at
java.net.URLClassLoader$1.run(URLClassLoader.java:20
2) at java.security.AccessController.doPrivileged(Native
Method) at
java.net.URLClassLoader.findClass(URLClassLoader.java:
190) at
java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at
sun.misc.Launcher$AppClassLoader.loadClass(Launcher
.java:301) at
java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: Systems. Program will
exit.
– Install GridSAM to location without spaces in path &
filename to avoid this
Part II – GridSAM and MapReduce
 2(a) With file staging, make sure you use username/password in ftp
sources and targets e.g.
ftp://anonymous:anonymous@localhost:55521/concat.sh. Otherwise
you may see (after launching job):
 mymachine:~/gridsam$ ./gridsam.sh GridSAMStatus -sn me -j
urn:gridsam:ff8081812fd3c742012fd3cb098f0001
Job Progress 'urn:gridsam:ff8081812fd3c742012fd3cb098f0001':
pending -> staging-in -> failed
--- pending - 2011-05-09 09:06:29.547 --job is being scheduled
--- staging-in - 2011-05-09 09:06:30.603 --staging files with private working directory...
--- failed - 2011-05-09 09:08:31.092 --FileJob failed after retry : 11 times : ftp://localhost:55521/concat.sh
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Part II – GridSAM and MapReduce
 2(b) Pseudocode section doesn't mention a
function for getting the job ID of a
particular job
– You are free to make assumptions on how
the primitives work
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