Cannot read RpcRequest: unknown case: RPCCall

[mrksmb]

Getting the following error after running:

sbt new UdashFramework/udash.g8 sbt compileStatics run

and pointing the browser to http://localhost:8080/ :

09:06:52.313 [qtp1137752618-86] ERROR io.udash.rpc.AtmosphereService - Error occurred while handling websocket data. com.avsystem.commons.serialization.GenCodec$UnknownCase: Cannot read io.udash.rpc.RpcRequest, unknown case: RPCCall at com.avsystem.commons.serialization.ErrorReportingCodec.unknownCase(macroCodecs.scala:308) at com.avsystem.commons.serialization.NestedSealedHierarchyCodec.readObject(macroCodecs.scala:151) at com.avsystem.commons.serialization.GenCodec$ObjectCodec.readNonNull(GenCodec.scala:291) at com.avsystem.commons.serialization.GenCodec$ObjectCodec.readNonNull$(GenCodec.scala:289) at com.avsystem.commons.serialization.SealedHierarchyCodec.readNonNull(macroCodecs.scala:113) at com.avsystem.commons.serialization.GenCodec$NullSafeCodec.read(GenCodec.scala:244) at com.avsystem.commons.serialization.GenCodec$NullSafeCodec.read$(GenCodec.scala:241) at com.avsystem.commons.serialization.SealedHierarchyCodec.read(macroCodecs.scala:113) at com.avsystem.commons.serialization.GenCodec$.read(GenCodec.scala:93) at com.avsystem.commons.serialization.json.JsonStringInput$.read(JsonStringInput.scala:14) at io.udash.rpc.AtmosphereService.readRequest(AtmosphereService.scala:196) at io.udash.rpc.AtmosphereService.handleRequest(AtmosphereService.scala:122) at io.udash.rpc.AtmosphereService.onWebsocketRequest(AtmosphereService.scala:84) at io.udash.rpc.AtmosphereService.onRequest(AtmosphereService.scala:64) at org.atmosphere.cpr.AsynchronousProcessor.action(AsynchronousProcessor.java:225)

Java version 1.8.0_221, accepted defaults during project setup.

[ddworak]

@mrksmb I've just run:

sbt new UdashFramework/udash.g8

then:

sbt compileStatics run

on a clean directory with Ubuntu 19.04 and openjdk version "1.8.0_222" - it all seems to work fine here.

Can you upload a minimal project somewhere?

Please also make sure to check without browser cache or in incognito mode. The exception you're getting looks like a mismatch between an older version of Udash on the frontend and a newer one on the backend.

[mrksmb]

@ddworak sorry for the delay. Clearing the browser cache / using incognito mode resolved the issue. I had used the previous Udash version in my browser several months ago which has probably caused the problem.

Is there a simiple way to add versioning to the files in the browser cache which caused this issue? That might make it smoother for other developers who upgrade to a new version in the future. Thank you!

[ddworak]

@mrksmb one way to do it would be the Cache-Control headers. Adding an issue for introducing an example to the template #451