how to disable warning for niogroovymethods

Question

I am using groovy-2.3.3, with jdk6u35. The groovy binaries have been extracted from groovy-sdk-2.3.3.zip.

After compiling with groovyc, I got an error while running java:

Unsupported major.minor version 51.0.

I googled and figured that the problem was with the groovy-all-2.3.3-indy.jar (which is used for jdk7+), so I removed it from my CLASSPATH. Now the program works, but it gives a warning:

WARNING: Module [groovy-all] - Unable to load extension class [org.codehaus.groovy.runtime.NioGroovyMethods]

How to disable this warning message, since I know that it is not applicable for my setup?

If I cannot disable this warning without a recompilation from source (which is not a valid option for me), is there any other groovy executable that I should download, instead of the sdk zip file, so that it can work with java-jdk6 without any warnings?

Answer 1

Before I got

➜~  groovy -version                          
Aug 6, 2014 12:29:38 PM org.codehaus.groovy.runtime.m12n.MetaInfExtensionModule newModule
WARNING: Module [groovy-nio] - Unable to load extension class [org.codehaus.groovy.runtime.NioGroovyMethods]
Groovy Version: 2.3.4 JVM: 1.6.0_45 Vendor: Sun Microsystems Inc. OS: Linux

Editvim $JAVA_HOME/jre/lib/logging.properties

Set INFO to SEVERE or OFF java.util.logging.ConsoleHandler.level = SEVERE

After

➜~  groovy -version                          
Groovy Version: 2.3.4 JVM: 1.6.0_45 Vendor: Sun Microsystems Inc. OS: Linux

UPDATE (Second better solution):

Remove groovy-nio-2.3.6.jar from lib folder

➜  ~  groovy --version
Aug 15, 2014 11:45:56 PM org.codehaus.groovy.runtime.m12n.MetaInfExtensionModule newModule
WARNING: Module [groovy-nio] - Unable to load extension class [org.codehaus.groovy.runtime.NioGroovyMethods]
Groovy Version: 2.3.6 JVM: 1.6.0_34 Vendor: Sun Microsystems Inc. OS: Linux
➜  ~  
➜  ~  mv $GROOVY_HOME/lib/groovy-nio-2.3.6.jar $GROOVY_HOME/lib/groovy-nio-2.3.6.bak
➜  ~  
➜  ~  groovy --version                                                              
Groovy Version: 2.3.6 JVM: 1.6.0_34 Vendor: Sun Microsystems Inc. OS: Linux