Re: 2.13 debug compile.log issue

I'm sorry for the inconvenience, it looks like you're encountering https://github.com/gwtproject/gwt/issues/10272. The bad news is that of all the GWT users running on Windows, you're one of only two (so far) able to reproduce this - but if possible, we'd love to gather a little more information on why that might be. The good news is that we have a tentative fix, linked from that ticket, with an SDK download for you to try and confirm that it solves it.

On Monday, March 2, 2026 at 12:44:27 PM UTC-6 RT wrote:

I tested out 2.13 in my project and got the following error after trying to debug "GWT Development Mode with Jetty" in Eclipse 2025-09 (4.37.0)

Running java org.eclipse.justj.openjdk.hotspot.jre.full.win32.x86_64_21.0.5.v20241023-1957\jre

Running CodeServer with parameters: [-noprecompile, -port, 9876, -sourceLevel, 17, -bindAddress, 127.0.0.1, -launcherDir, C:\myproject\war, -logLevel, INFO, -style, OBFUSCATED, -strict, com.myclass, com.myclass]
Super Dev Mode starting up
   workDir: C:\Users\me\AppData\Local\Temp\gwt-codeserver-15019746707938385524
[main] INFO org.eclipse.jetty.util.log - Logging initialized @2022ms to org.eclipse.jetty.util.log.Slf4jLog
   Loading Java files in com.myclass.
   Module setup completed in 3179 ms
java.nio.file.FileSystemException: C:\Users\me\AppData\Local\Temp\gwt-codeserver-15019746707938385524\com.myclass\compile-1: failed to delete one or more files; see suppressed exceptions for details
at com.google.gwt.thirdparty.guava.common.io.MoreFiles.throwDeleteFailed(MoreFiles.java:803)
at com.google.gwt.thirdparty.guava.common.io.MoreFiles.deleteRecursively(MoreFiles.java:554)
at com.google.gwt.dev.codeserver.OutboxDir.create(OutboxDir.java:91)
at com.google.gwt.dev.codeserver.CodeServer.makeOutboxTable(CodeServer.java:182)
at com.google.gwt.dev.codeserver.CodeServer.start(CodeServer.java:151)
at com.google.gwt.dev.codeserver.CodeServer.main(CodeServer.java:104)
at com.google.gwt.dev.codeserver.CodeServer.main(CodeServer.java:55)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at com.google.gwt.dev.shell.SuperDevListener.runCodeServer(SuperDevListener.java:118)
at com.google.gwt.dev.shell.SuperDevListener.start(SuperDevListener.java:97)
at com.google.gwt.dev.DevMode.ensureCodeServerListener(DevMode.java:705)
at com.google.gwt.dev.DevModeBase.doStartup(DevModeBase.java:778)
at com.google.gwt.dev.DevMode.doStartup(DevMode.java:599)
at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:880)
at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:698)
at com.google.gwt.dev.DevMode.main(DevMode.java:476)
Suppressed: java.nio.file.FileSystemException: C:\Users\me\AppData\Local\Temp\gwt-codeserver-15019746707938385524\com.myclass\compile-1\compile.log: The process cannot access the file because it is being used by another process
at java.base/sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:92)
at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:103)
at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:108)
at java.base/sun.nio.fs.WindowsFileSystemProvider.implDelete(WindowsFileSystemProvider.java:273)
at java.base/sun.nio.fs.AbstractFileSystemProvider.delete(AbstractFileSystemProvider.java:104)
at java.base/java.nio.file.Files.delete(Files.java:1152)
at com.google.gwt.thirdparty.guava.common.io.MoreFiles.deleteRecursivelyInsecure(MoreFiles.java:678)
at com.google.gwt.thirdparty.guava.common.io.MoreFiles.deleteDirectoryContentsInsecure(MoreFiles.java:698)
at com.google.gwt.thirdparty.guava.common.io.MoreFiles.deleteRecursivelyInsecure(MoreFiles.java:671)
at com.google.gwt.thirdparty.guava.common.io.MoreFiles.deleteRecursively(MoreFiles.java:543)
... 15 more

Looks like guava MoreFiles is having issues with the log file created.

I tried running Eclipse as admin and doing a clean/rebuild but the error remains. 

Changing back to 2.12.2 allows the debug session to run even with the log issue:
Super Dev Mode starting up
   workDir: C:\Users\me\AppData\Local\Temp\gwt-codeserver-5121754604815682518.tmp
[main] INFO org.eclipse.jetty.util.log - Logging initialized @2240ms to org.eclipse.jetty.util.log.Slf4jLog
   Loading Java files in com.myclass.
   Module setup completed in 4115 ms
   [WARN] unable to delete 'C:\Users\me\AppData\Local\Temp\gwt-codeserver-5121754604815682518.tmp\com.myclass\compile-1' (skipped)
   [ERROR] unable to create directory: C:\Users\me\AppData\Local\Temp\gwt-codeserver-5121754604815682518.tmp\com.myclass\compile-1
   Loading Java files in com.myclass.
   Module setup completed in 731 ms
[main] INFO org.eclipse.jetty.server.Server - jetty-9.4.44.v20210927; built: 2021-09-27T23:02:44.612Z; git: 8da83308eeca865e495e53ef315a249d63ba9332; jvm 21.0.5+11-LTS
[main] INFO org.eclipse.jetty.server.handler.ContextHandler - Started o.e.j.s.ServletContextHandler@29835b68{/,null,AVAILABLE}
[main] INFO org.eclipse.jetty.server.AbstractConnector - Started ServerConnector@1c45c654{HTTP/1.1, (http/1.1)}{127.0.0.1:9876}

[main] INFO org.eclipse.jetty.server.Server - Started @5882ms
The code server is ready at http://127.0.0.1:9876/

I'm guessing it's something to do with my specific build, so is there something I can do to either relocate the log file or disable it perhaps?  

--
You received this message because you are subscribed to the Google Groups "GWT Users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscribe@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/google-web-toolkit/3037c0f8-1bac-4d3a-b429-505922ec26a6n%40googlegroups.com.