Unusual (for me) GWT compile messages

Hi,

I am running Eclipse with GWT 2.5.1 and the ADT bundle on a Windows 7 box.  I've been writing simple GWT apps for a while now.  I am not a java expert but things have generally worked out.  I am seeing a number of compile issues that i have not seen before and i am looking for guidance.

First, there are no errors or warnings reported in the code.  During the compile I have "LogLevel" set to Track based on a different set of messages.

When I do a GWT Compile I see:

[ERROR] Failure in unit cache map load.

[ERROR] Stack overflow; to increase the stack size, use the -Xss flag at startup (java -Xss1M ...)

Then a few "The method compare(int, int) is undefined for the type Integer".

There are a ton of output lines i am trimming as many as I dare below.

What have I tried:

= I don't know what the "Failure in unit cache map load" message means

= for the stackoverflow I have increased the size to 10M "-Xss1M" but I'm not sure what is reasonable number really is.

= For the "compare" issues I'm not sure what is happening there.  In each case i am trying something like:

TreeSet<Reservation> ITEMS = new TreeSet<Reservation>(
new JSONObjectComparator());
class JSONObjectComparator implements Comparator<Reservation> {
@Override
public int compare(Reservation o1, Reservation o2) {
return java.lang.Integer.compare(o1.getReservationID(), o2.getReservationID());
}
}

 

The trimmed compile output...

Public resources found in...
Translatable source found in...
Persistent unit cache dir set to: X:\repository\EMS-Test\EMS-Test\war\..\gwt-unitCache
Compiling module edu.illinois.beckman.its.EMS_Test
Looking for previously cached Compilation Units in X:\repository\EMS-Test\EMS-Test\war\..\gwt-unitCache
   Looking for precompiled archives.  To disable, use -Dgwt.usearchives=false
   Loading archived module: jar:file:/C:/me/ANDROID/adt-bundle-windows-x86_64-20130729/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.5.1/gwt-2.5.1/gwt-user.jar!/com/google/gwt/user/User.gwtar
gwt-unitCache-00000141A30FE5A3: Load complete
[...]
gwt-unitCache-00000141DB9C3938: Load complete
[ERROR] Failure in unit cache map load.
java.util.concurrent.ExecutionException: java.lang.StackOverflowError
at java.util.concurrent.FutureTask$Sync.innerGet(Unknown Source)
at java.util.concurrent.FutureTask.get(Unknown Source)
at com.google.gwt.dev.javac.PersistentUnitCache.awaitUnitCacheMapLoad(PersistentUnitCache.java:466)
at com.google.gwt.dev.javac.PersistentUnitCache.find(PersistentUnitCache.java:391)
at com.google.gwt.dev.javac.CompilationStateBuilder.addArchive(CompilationStateBuilder.java:365)
at com.google.gwt.dev.ArchivePreloader.preloadArchives(ArchivePreloader.java:65)
at com.google.gwt.dev.Precompile.precompile(Precompile.java:243)
at com.google.gwt.dev.Precompile.precompile(Precompile.java:229)
at com.google.gwt.dev.Precompile.precompile(Precompile.java:141)
at com.google.gwt.dev.Compiler.run(Compiler.java:232)
at com.google.gwt.dev.Compiler.run(Compiler.java:198)
at com.google.gwt.dev.Compiler$1.run(Compiler.java:170)
at com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:88)
at com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger(CompileTaskRunner.java:82)
at com.google.gwt.dev.Compiler.main(Compiler.java:177)
Caused by: java.lang.StackOverflowError
at java.io.ObjectInputStream$BlockDataInputStream.read(Unknown Source)
at java.io.ObjectInputStream.read(Unknown Source)
at java.io.InputStream.read(Unknown Source)
at com.google.gwt.dev.util.DiskCache.transferFromStream(DiskCache.java:159)
at com.google.gwt.dev.util.DiskCacheToken.readObject(DiskCacheToken.java:87)
[...]
at sun.reflect.GeneratedMethodAccessor19.invoke(Unknown Source)
   [ERROR] Stack overflow; to increase the stack size, use the -Xss flag at startup (java -Xss1M ...)
   Loading archived module: jar:file:/C:/me/ANDROID/adt-bundle-windows-x86_64-20130729/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.5.1/gwt-2.5.1/gwt-user.jar!/com/google/gwt/core/Core.gwtar
   Loading archived module: jar:file:/C:/me/ANDROID/adt-bundle-windows-x86_64-20130729/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.5.1/gwt-2.5.1/gwt-user.jar!/com/google/gwt/regexp/RegExp.gwtar
   Loading archived module: jar:file:/C:/me/ANDROID/adt-bundle-windows-x86_64-20130729/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.5.1/gwt-2.5.1/gwt-user.jar!/com/google/web/bindery/event/Event.gwtar
   Loading archived module: jar:file:/C:/me/ANDROID/adt-bundle-windows-x86_64-20130729/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.5.1/gwt-2.5.1/gwt-user.jar!/com/google/gwt/json/JSON.gwtar
   Loading archived module: jar:file:/C:/me/ANDROID/adt-bundle-windows-x86_64-20130729/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.5.1/gwt-2.5.1/gwt-user.jar!/com/google/gwt/logging/Logging.gwtar
   Found 2750 cached/archived units.  Used 2750 / 2758 units from cache.
   Compiling...
      Compilation completed in 11.67 seconds
   Added 2756 units to cache since last cleanup.
   Validating units:
      Errors in 'file:/X:/repository/EMS-Test/EMS-Test/src/edu/college/its/client/reservation/Reservation.java'
         Line 42: The method compare(int, int) is undefined for the type Integer
         Line 57: The method compare(int, int) is undefined for the type Integer
      Errors in 'file:/X:/repository/EMS-Test/EMS-Test/src/edu/college/its/client/reservation/ReservationList.java'
         Line 26: The method compare(int, int) is undefined for the type Integer

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