Error while deploying GWT Project on GAE server

[vikash@Atos]

Hi,

When I am trying to deploy my GWT Project on GAE server (web hosting),
I am getting the following error in console:

Compiling module com.atos.VisitorRegistration
Validating newly compiled units
Ignored 1 unit with compilation errors in first pass.
Compile with -strict or with -logLevel set to TRACE or DEBUG to see
all errors.
Finding entry point classes
[ERROR] Errors in 'file:/D:/gwtproject/gwtws/
VisitorRegistrationSystem/src/com/atos/client/
VisitorRegistration.java'
[ERROR] Line 56: No source code is available for type
com.atos.db.DBUtil; did you forget to inherit a required module?
[ERROR] Unable to find type
'com.atos.client.VisitorRegistration'
[ERROR] Hint: Previous compiler errors may have made this
type unavailable
[ERROR] Hint: Check the inheritance chain from your module;
it may not be inheriting a required module or a module may not be
adding its source path entries properly
Exception in thread "UnitWriteThread" java.lang.RuntimeException:
Unable to read from byte cache
at
com.google.gwt.dev.util.DiskCache.transferToStream(DiskCache.java:196)
at
com.google.gwt.dev.util.DiskCacheToken.writeObject(DiskCacheToken.java:
91)
at sun.reflect.GeneratedMethodAccessor25.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown
Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown
Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown
Source)
at java.io.ObjectOutputStream.writeObject0(Unknown Source)
at java.io.ObjectOutputStream.writeObject(Unknown Source)
at com.google.gwt.dev.javac.PersistentUnitCache
$UnitWriter.run(PersistentUnitCache.java:226)
Caused by: java.io.IOException: Read error
at java.io.RandomAccessFile.read(Native Method)
at java.io.RandomAccessFile.readInt(Unknown Source)
at
com.google.gwt.dev.util.DiskCache.transferToStream(DiskCache.java:183)
... 14 more



Please suggest, what could be the issue?

Thanks,
Vikash

[Jens]

Root cause in your error: 

[ERROR] Line 56: No source code is available for type com.atos.db.DBUtil; did you forget to inherit a required module? 

The GWT compiler does not see com.atos.db.DBUtil.java as its not in your client package but is used by any of your client classes. Either move the class into the client package or make the file visible to the GWT compiler through your module.gwt.xml file (add a <source> tag).

If this file contains JDBC utility code then re-think what you are trying to do. A web browser can't open a direct JDBC connection to your database.

-- J.