[Scons-users] SCons Intermittent parallel build failures

[Dirk Bächle]

Hi Brady,

On 31.03.2014 21:35, Brady Johnson wrote:

>

> Hello all,

>

> I */occasionally /*get build failures when doing parallel builds while 

> compiling java code.

>

> The dependencies are very clear, as follows:

> 1) WsCommon java code is compiled

> 2) The WsCommon.jar file is created, specifying the classes from 1) as 

> the source

> 3) The WsCommon.jar target is used in the classpath to compile other 

> java code, and also as a source to a WAR file builder.

>

> Here is an excerpt that I can show from the SConscript:

>

>     tclass = env.SccfJava(target='WsCommon/classes',

>     source='WsCommon/src/main/java',

>     JAVACLASSPATH=ws_common_classpath)

>     target_WsCommon_jar = env.SccfJar(target='WsCommon.jar',

>     source='WsCommon/classes')

>     tclass = env.SccfJava(target='DomainIpService/classes',

>       source='DomainIpService/src/main/java',

>       JAVACLASSPATH=[target_WsCommon_jar,

>                      ws_common_classpath,

>                      ...])

>

>


I'm no Java expert, but for this to work properly the JAR file would 
have to get added as implicit dependency, based on appearing in the 
JAVACLASSPATH variable. I checked the core sources for v2.3.1, but this 
doesn't seem to be supported for the standard Java() builder.

I guess you'll either have to fix your SccfJava(), or explicitly add a 
dependency as follows:

   tclass = env.SccfJava(target='DomainIpService/classes',
source='DomainIpService/src/main/java',
JAVACLASSPATH=[target_WsCommon_jar,
              ws_common_classpath,
              ...])
   env.Depends(tclass, target_WsCommon_jar)

Hope this helps you any further.

Best regards,

Dirk

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