Firstly, about 2 weeks ago I started receiving the exception, CreateProcess
error=87, The parameter is incorrect. This occurs when I try to run my app
on devmode on Google App Engine. I have searched all over the internet and I
was able to solve this by adding useexternalfile="yes" to ant build.xml at
the javadoc target. But, this was solved only when I'm not running in
devmode. That is, I'm running the app directly at
http://localhost:8888/[app-name]. The error is below;
java.io.IOException: Cannot run program
"C:\Java\jdk1.6.0_06\jre\bin\java.exe" (in directory
"D:\AllData\netBeans_Projects\Listings"): CreateProcess error=87, The
parameter is incorrect
at java.lang.ProcessBuilder.start(ProcessBuilder.java:459)
at java.lang.Runtime.exec(Runtime.java:593)
at
org.apache.tools.ant.taskdefs.Execute$Java13CommandLauncher.exec(Execute.java:827)
at org.apache.tools.ant.taskdefs.Execute.launch(Execute.java:445)
at org.apache.tools.ant.taskdefs.Execute.execute(Execute.java:459)
at org.apache.tools.ant.taskdefs.Java.fork(Java.java:791)
at org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:214)
at org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:135)
at org.apache.tools.ant.taskdefs.Java.execute(Java.java:108)
at
org.datanucleus.enhancer.tools.EnhancerTask.execute(EnhancerTask.java:100)
at
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
at sun.reflect.GeneratedMethodAccessor233.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
Secondly, I have gotten my app up to advanced stage where I am adding maps,
extensive use of GWT for DOM Manipulation to improve UI etc, but when I try
to build my app, I get the error below;
[ERROR] Unexpected
java.lang.NoClassDefFoundError: javax/jdo/spi/Detachable
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
at java.net.URLClassLoader.access$000(URLClassLoader.java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at
com.google.gwt.dev.javac.TypeOracleMediator.resolveAnnotationValue(TypeOracleMediator.java:710)
at
com.google.gwt.dev.javac.TypeOracleMediator.createAnnotation(TypeOracleMediator.java:442)
at
com.google.gwt.dev.javac.TypeOracleMediator.resolveAnnotation(TypeOracleMediator.java:608)
at
com.google.gwt.dev.javac.TypeOracleMediator.resolveAnnotations(TypeOracleMediator.java:623)
at
com.google.gwt.dev.javac.TypeOracleMediator.resolveClass(TypeOracleMediator.java:768)
at
com.google.gwt.dev.javac.TypeOracleMediator.addNewUnits(TypeOracleMediator.java:385)
at
com.google.gwt.dev.javac.CompilationState.assimilateUnits(CompilationState.java:165)
at
com.google.gwt.dev.javac.CompilationState.<init>(CompilationState.java:82)
at
com.google.gwt.dev.javac.CompilationStateBuilder.doBuildFrom(CompilationStateBuilder.java:392)
at
com.google.gwt.dev.javac.CompilationStateBuilder.buildFrom(CompilationStateBuilder.java:275)
at
com.google.gwt.dev.cfg.ModuleDef.getCompilationState(ModuleDef.java:299)
at com.google.gwt.dev.Precompile.precompile(Precompile.java:529)
at com.google.gwt.dev.Precompile.precompile(Precompile.java:466)
at com.google.gwt.dev.Compiler.run(Compiler.java:205)
at com.google.gwt.dev.Compiler.run(Compiler.java:177)
at com.google.gwt.dev.Compiler$1.run(Compiler.java:149)
at
com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:87)
at
com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger(CompileTaskRunner.java:81)
at com.google.gwt.dev.Compiler.main(Compiler.java:156)
Caused by: java.lang.ClassNotFoundException: javax.jdo.spi.Detachable
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
... 33 more
One more thing to add is, whenever I make simple changes to the client-side
code(GWT), this error pops up as well, which always requires me to clean it
and then build again, which obviously have started to refuse to even compile
successfully. FYI, most of these problems started occuring when I added to
my project libraries gwt-user.jar, majorly because I needed to use JSON to
handle a REST request (Response dispatched to a Place using Activity & Place
MVP). Initially this jar file was included in my project by default, hence
the package com.google.gwt.json wasn't available.
Dev environment:
- GWT 2.1
- Google App Engine 1.4.3
- JDO
- Spring 3
- Activity and Place
Can somebody in the name of God help me with this. It's been weeks I've
trying to get out of this.
Regards
--
Odeyemi 'Kayode O.
http://www.sinati.com
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