Re: problem with remote class loading

Andreas Unterkircher wrote:
> Hello,
> 
> I'm using SmartFrog 3.06.0011rc1 under Linux. There is a problem with 
> remote class loading. I'd like to load 2 classes remotely, thus 
> setSFDynamicClassLoadingProperties looks as follows:
> 
> export SERVER=http://grid-deployment.web.cern.ch
> export 
> CODEBASE="$SERVER/grid-deployment/distribution/RpmBuild/ia64-sl3-Andreas/downloadConf/smartfrog/sfLCGinstall.jar 
> $SERVER/grid-deployment/distribution/RpmBuild/ia64-sl3-Andreas/downloadConf/smartfrog/commons-io-1.0.jar"
>                                                                                 
> export SFCODEBASE=-Dorg.smartfrog.codebase="$CODEBASE"
> 
> But sfDaemon yields:
> 
> 
>>sfDaemon java 
> 
> -Dorg.smartfrog.iniFile=/opt/SmartFrog.3.06.011rc1/dist/bin/default.ini 
> -Dorg.smartfrog.sfcore.processcompound.sfDefault.sfDefault=/opt/SmartFrog.3.06.011rc1/dist/bin/default.sf 
> -Dorg.smartfrog.codebase=http://grid-deployment.web.cern.ch/grid-deployment/distribution/RpmBuild/ia64-sl3-Andreas/downloadConf/smartfrog/sfLCGinstall.jar 
> http://grid-deployment.web.cern.ch/grid-deployment/distribution/RpmBuild/ia64-sl3-Andreas/downloadConf/smartfrog/commons-io-1.0.jar 
> -Dorg.smartfrog.sfcore.processcompound.sfProcessName=rootProcess 
> org.smartfrog.SFSystem
> java.lang.NoClassDefFoundError: 
> http://grid-deployment/web/cern/ch/grid-deployment/distribution/RpmBuild/ia64-sl3-Andreas/downloadConf/smartfrog/commons-io-1/0/jar
> 
> Note how in the second URL to the jar the "." got transformed into "/". I 
> tried to place escapes in various ways but never succeeded. Also, just 
> loading one jar works fine. Clould you test on your Linux machine if 
> multiple classloading works ? I'm not sure whether the error stems from 
> the shell script level or if it has to do with the way some SF java class 
> reads the options.

This is something we have to test more.

1. I think in the past there was trouble with multi-JAR loading

2. I had dynamic classloading working on my laptop until 24 hours before 
a public demo of smartfrog, then a forced reboot and it never came back.

because of (2) I am not sure that dynamic loading is working properly.

At the same time, the error message NoClassDefFound implies that java is 
trying to load the class commons-io-1/0/jar, and that it is the Java 
runtime that is doing the package to resource directory mapping. This 
would be the case if the $SFCODEBASE env variable wasnt being enclosed 
in quotes properly, and so the jvm is trying to run commons-io rather 
than sfSystem as the entry point.

Looks to me like a quoting bug in sfDaemon.

-steve


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