AppEngine Maven Plugin jarSplittingExcludes - google-app-engine

Question

I'm trying to include the stanford-corenlp library into my AppEngine application, but am running into "JAR too big" errors when uploading:
com.google.appengine.tools.admin.LocalIOException: Jar.../stanford-corenlp-3.3.0-models.jar is too large. Consider using --enable_jar_splitting.
Unable to update app: Jar /tmp/appcfg4516706702870427847.tmp/WEB-INF/lib/stanford-corenlp-3.3.0-models.jar is too large. Consider using --enable_jar_splitting.
As suggested, I tried the enable_jar_splitting option, but some individuals files were too large and those can't be split. Looking through the plugin docs I found:
jarSplittingExcludes
User property: appengine.jarSplittingExcludes
When --enable-jar-splitting is set, files that match the list of comma
separated SUFFIXES will be excluded from all jars.
So I tried to exclude some of the large files that I'm not using with this pom.xml:
<plugin>
<groupId>com.google.appengine</groupId>
<artifactId>appengine-maven-plugin</artifactId>
<version>${appengine.target.version}</version>
<configuration>
<enableJarSplitting>true</enableJarSplitting>
<jarSplittingExcludes>englishRNN.ser.gz</jarSplittingExcludes>
</configuration>
</plugin>
However, now when I run
mvn appengine:update
I get:
[INFO] Updating Google App Engine Application
Bad argument: Unknown option: --jar_splitting_excludes
usage: AppCfg [options] <action> [<app-dir>] [<argument>]
...
options:
....
--enable_jar_splitting
Split large jar files (> 10M) into smaller fragments.
--jar_splitting_excludes=SUFFIXES
When --enable-jar-splitting is set, files that match
the list of comma separated SUFFIXES will be excluded
from all jars.
Any ideas on what I'm doing wrong?

Answer 1

Turns out it was a bug. Should be fixed in 1.9.7. You can clone the development branch for earlier access:
$ git clone https://code.google.com/p/appengine-maven-plugin/
$ cd appengine-maven-plugin
$ mvn install
and change in you pom the plugin version to 1.9.7-SNAPSHOT (keep the other artifacts the same, change only for the plugin)