Thanks Vegegoku. On closer inspection of the sample Nalu project, I do get the same errors in the log about the serialization policy file not found, but the RPC still works. I'm guessing it's because the sample RPC is simple, and the legacy serialization policy still works.
*Side question:* Does anyone know if there a way in IntelliJ, to make a compound launcher, so it'll start the CodeServer, wait for a little bit, then start the SpringBoot server? On Wednesday, 7 January 2026 at 10:04:21 pm UTC+11 Vegegoku wrote: > I can’t comment on the specifics of Nalu, but the behavior you’re seeing > is related to SDM. When running the GWT SDM server, your Spring server > relies on the SDM working directory (launcherDir, typically named > accordingly) to serve resources. This directory is created when SDM starts. > > If the Spring server is started *before* SDM, the directory will not yet > exist, causing the server to fail. Likewise, if launcherDir is configured > inside a build directory that gets cleaned between builds (for example, > Maven’s target directory), running mvn clean will delete it. In that case, > the issue will only appear after a clean build, which you can easily verify. > > If you point launcherDir to a location that persists between builds (not > generally recommended), the startup order would no longer matter. You can > test this by configuring both the Spring server and the SDM launcherDir to > use a persistent location and observing the behavior. > On Wednesday, January 7, 2026 at 1:46:11 PM UTC+3 Craig Mitchell wrote: > >> When I generate a sample "modular-springboot-webapp" project from >> https://github.com/NaluKit/gwt-maven-springboot-archetype , it doesn't >> seem to matter what order I start things up (I can start the spring-boot >> server before the codeserver), and the GWT RPC works fine. >> >> However, with my project, I must start the codeserver first. If I start >> the spring-boot server first, I get errors in the log: >> io.undertow.servlet: team.drift.server.ServerImpl: ERROR: The >> serialization policy file '/dt/BDAD2B7008E641096B983533BA494290.gwt.rpc' >> was not found; did you forget to include it in this deployment? >> >> io.undertow.servlet: team.drift.server.ServerImpl: WARNING: Failed to get >> the SerializationPolicy 'BDAD2B7008E641096B983533BA494290' for module ' >> http://lvh.me:8080/dt/'; a legacy, 1.3.3 compatible, serialization >> policy will be used. You may experience SerializationExceptions as a >> result. >> >> Followed by my app crashing when trying to do RPC with >> com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException being >> thrown. >> >> Is is a requirement that the CodeServer must be started first? Or have I >> messed something up in one of my pom.xml files? >> > -- 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 [email protected]. To view this discussion visit https://groups.google.com/d/msgid/google-web-toolkit/d78b79a0-1d17-473d-aede-b12b21d07e76n%40googlegroups.com.
