Re: Auto-weka problem

Michael Hall wrote
>> On Jun 13, 2021, at 5:13 PM, justinuliu <

> [email protected]

> > wrote:
>> 
>> Hi,
>> 
>> Auto-weka will invoke java while running. So please make sure that you
>> have
>> installed JRE or JDK in your system and correctly set the PATH variable
>> to
>> include $JAVA_HOME/bin before using it. That is, if you cannot invoke
>> java
>> in command prompt, Auto-weka will not be able to invoke it either and
>> fail.
>> You can simply put bundled jre (weka-$VERSION/jre/zulu*/bin) in PATH
>> variable if you don't want to install any other JAVA package.
>> 
>> Hope this helps.
>> 
>> Cheers,
>> Justin
> 
> I think your solution only applies command line or on some specific
> platform? On OS/X the jre for the Weka application is embedded and doesn’t
> include a bin directory at all. You used to be able to just copy a
> compatible one in for the ‘java’ command but I haven’t tried that for a
> while. I did do it for Auto-Weka some time ago.
> Currently I’ve been doing things, not Weka, with app’s created using the
> jpackage command. Here it seems to depend on what jlink related parameters
> you use. To get the java command I think you would just need —link-options
> that omit —strip-native-commands. For other commands I think you need to
> include the correct —add-modules.
> I don’t believe Weka uses jpackage at this time. 
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Hi,

Sorry for misleading you. In the previous message, I should say "take an
example on Ubuntu". You're right, there is no bin folder in the WEKA
application on OS/X, so we cannot simply let PATH variable include the
embedded JRE.

I have observed this problem occurs both on Windows and Ubuntu even if I use
GUI. When the problem occurs, again take an example on Ubuntu, I can see
something like "mac-v2.10.03-master-778/smac: line 13: exec: java: not
found" in the log file in /tmp/autowekaXXXXXXXXXXX/Auto-WEKA/out/logs. Then
I assume that Auto-WEKA need to invoke java command while running. After I
have installed java package and make sure I can call java in terminal, the
problem disappeared. So I think smac may simply run a command call in
somewhere. 

BTW, for the embedded jre on OS/X, I used to delete the Home folder in
/Application/weka-3-8-5-azul-zulu.app/Contents/Plugins/zulu-11.jre/Content/
and create a soft link to my current java home. It looks working well. 





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