Hi, looking at your build logs it seems you have executed
ant clean dist -Dgwt.tools=/home/aarmugam/GWT_Source_code/gwt-2.4.0/tools/ -Dgwt.version=2.4.0 ant clean dist-dev -Dgwt.tools=/home/aarmugam/GWT_Source_code/gwt-2.4.0/tools/ -Dgwt.version=2.4.0 In both cases you have set the system property "gwt.tools" to "gwt-2.4.0/tools". Given the full path it looks a bit unusual so I want to verify that you actually did the correct thing. To build GWT you need to checkout two repositories: https://github.com/gwtproject/gwt and https://github.com/gwtproject/tools. But the system property "gwt.tools" is a bit confusing because the project https://github.com/gwtproject/gwt also has a folder "tools", see https://github.com/gwtproject/gwt/tree/main/tools . The system property should point to the checked out project https://github.com/gwtproject/tools and not to the subfolder "tools" of the checked out project https://github.com/gwtproject/gwt. You don't need to set the system property at all, if you checkout both projects next to each other, because by default the GWT build script uses "../tools" as value. So the easiest way is to have a folder layout like GWT_Source_code |--- gwt-2.4.0 (checkout of https://github.com/gwtproject/gwt) |--- here is also a different tools folder as part of GWT |--- tools (checkout of https://github.com/gwtproject/tools) So maybe verify that you have not accidentally mixed up both these tools folders. -- J. Anjana A schrieb am Dienstag, 16. Januar 2024 um 14:55:45 UTC+1: > Colin, > > As mentioned earlier due to some unavoidable constraints we are unable to > upgrade GWT to its latest version and so we are trying out this option. I > have attached the GWT.2.4.0 ant build logs and GWT error related build > logs. I am not sure if this gonna work but just wanted to give a try and if > it works it will be helpful. Thank you very much! > > > Regards, > Anjana > > On Tuesday, January 16, 2024 at 6:17:08 PM UTC+5:30 Colin Alworth wrote: > > Unfortunately, there isn't enough information to help you without redoing > the work you've done - most of your log looks like the jvm's own internal > logging, which doesn't tell me anything right away at least. > > What commands exactly did you use to build, and what changes did you make, > how did you validate that the jars you created were able to be used at all, > how did you ensure that the changes you made would solve the problems you > are after? Can you share the full build log - for certain "Unable to find > ..." is not the first line of logging that GWT itself emitted. > > In the event you are cherry-picking specific GWT commits since 2.4, to add > support for newer JVMs (which is to say changes that are known to add > support for newer JDKs), why not simply update to a newer GWT version? > Wouldn't it be better to use a version built and tested for what you > intend, than to make a custom fork of a 12 year old version? > > Quick testing locally shows at least that 2.8.2 will run on Java 17 for > the Hello sample app, which is still pretty old, having been published in > 2017. In the event you aren't able to update to latest, what about just > updating to something not quite as old, but validated to work on Java9+? > > On Tuesday, January 16, 2024 at 6:26:19 AM UTC-6 anjana....@gmail.com > wrote: > > Hi Colin, > > Thanks for the response! > As an initial step I am try to build the GWT SDK jars from source code by > following the instructions provided in this link - > https://github.com/gwtproject/gwt?tab=readme-ov-file > > With few corrections in GWT.2.4.0 source code was able to build jars > successfully with JDK 17 and also tried with JDK.1.8 (no code change made) > by using command ant clean dist-dev with -Dgwt.tools from CLI as mentioned > in the above link. But when I use these generated jars(gwt-dev.jar, > gwt-user.jar, gwt-servlet.jar, gwt-servlet-deps.jar, > requestfactory-apt.jar, requestfactory-client.jar, > requestfactory-server.jar, requestfactory-client+src.jar, > requestfactory-server+src.jar, requestfactory-client-src.jar, > requestfactory-server-src.jar) into my application, I am getting below > error- > > Error trace- > > [java] [1.574s][info][class,load] > com.google.gwt.dev.javac.CompilationProblemReporter source: > > [java] [1.575s][info][class,load] > java.lang.invoke.LambdaForm$MH/0x00007fe964144000 source: > __JVM_LookupDefineClass__ > > [java] [1.575s][info][class,load] > java.lang.invoke.LambdaForm$MH/0x00007fe964144400 source: > __JVM_LookupDefineClass__ > [java] [1.576s][info][class,load] > java.lang.invoke.LambdaForm$MH/0x00007fe964144800 source: > __JVM_LookupDefineClass__ > [java] [1.576s][info][class,load] > java.lang.invoke.LambdaForm$MH/0x00007fe964144c00 source: > __JVM_LookupDefineClass__ > [java] > *[ERROR] Unable to find type 'java.lang.Object'* [java] > [1.577s][info][class,load] com.google.gwt.dev.util.Messages source: > > [java] *[ERROR] Hint: Check that your module inherits > 'com.google.gwt.core.Core' either directly or indirectly (most often by > inheriting module 'com.google.gwt.user.User')* > [java] [1.578s][info][class,load] > java.util.IdentityHashMap$KeyIterator source: shared objects file > [java] [1.578s][info][class,load] java.io.RandomAccessFile$1 source: > shared objects file > [java] [1.579s][info][class,load] > java.util.prefs.FileSystemPreferences$10 source: jrt:/java.prefs > [java] [1.579s][info][class,load] > java.util.prefs.FileSystemPreferences$12 source: jrt:/java.prefs > [java] [1.579s][info][class,load] > java.util.prefs.FileSystemPreferences$11 source: jrt:/java.prefs > > > I checked many blogs on the similar error where it was mentioned the root > cause for this issue was because of classpath mistake. I am running my > application ant build from CLI and also I have verified that all the > required jars are present in classpath. Could you please guide me here to > tackle this issue? Please note I am also *facing same issue when I > build jars with JDK.1.8 without any code change in GWT.2.4.0 source code*. > > GWT.2.4.0 source code downloaded from - > https://github.com/gwtproject/gwt/releases/tag/2.4.0 > <https://github.com/gwtproject/gwt/releases/tag/2.4.0> > tools - https://github.com/gwtproject/tools/ > <https://github.com/gwtproject/tools/> > > Thanks in advance! > > Regards, > Anjana > > On Wednesday, January 3, 2024 at 10:25:25 PM UTC+5:30 Colin Alworth wrote: > > (I wrote a longer reply, but Google Groups ate it and never posted it, so > apologies for brevity here): > > Without more information, it is hard to give a specific answer - are you > just hoping to update the Java version and make no changes to the > application? It might be that nothing at all needs to be done. If you're > using GWT-RPC, you might have no changes to make at all, or you might need > an --add-opens jvm arg for a few specific classes (fix to be released in > GWT 2.11). > > On the other hand, if you're running the compiler or dev mode on Java 17, > other changes are likely needed, due to dependencies that have changed with > the Java update. > > GWT 2.4.0 was released just over 12 years ago, and was intended to run on > Java 6 - even Java 8 will only be ten years old in about two months. > > On Wednesday, January 3, 2024 at 8:40:28 AM UTC-6 anjana....@gmail.com > wrote: > > Hi Team, > > Due to some business constraints our application is still running on old > GWT.2.4.0 and now we wanted to upgrade java version of our application to > JDK 17. is it possible to run GWT.2.4.0 on an application which uses JDK > 17? if yes, can you please guide me with the helpful resources for the > same? > > Thanks, > Anjana > > -- You received this message because you are subscribed to the Google Groups "GWT Users" group. 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