Flow Designer error on save

[ericgilmore]

Working with Flow Designer, everything was going fine until I wrote and assigned a function script to the Short Description field of a Create Catalog Task action. After writing the script, I clicked [Done], [Save], and [Activate] and it worked as usual.

Then I decided to NOT use the script, so I went back, deleted what I'd done, clicked [Done], [Save], and [Activate] and immediately received some error asking me to look at the error logs.

Went back, looked at the Create Catalog Task action, no script. Everything looks normal, clicked [Done], [Save], [Activate], everything worked no error, but I now noticed that the [Flow] button is NOT green and the [Acitvate] button is still blue, so it didn't activate although it didn't display an error.

I go to the error logs and I see two recent entries:

Failed to invoke public com.glide.flow.model.ComponentInstance() with no args
com.google.gson.internal.ConstructorConstructor$3.construct(ConstructorConstructor.java:107)
com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:162)
com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40)
com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:81)
com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93)
com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172)
com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40)
com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:81)
com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93)
com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172)
com.google.gson.Gson.fromJson(Gson.java:803)
com.google.gson.Gson.fromJson(Gson.java:768)
com.google.gson.Gson.fromJson(Gson.java:717)
com.google.gson.Gson.fromJson(Gson.java:689)
com.glide.flow_design.rest.FlowService.updateFlow(FlowService.java:437)
sun.reflect.GeneratedMethodAccessor2748.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
com.glide.rest.handler.impl.ServiceHandlerImpl.invokeService(ServiceHandlerImpl.java:44)
com.glide.rest.processors.RESTAPIProcessor.process(RESTAPIProcessor.java:286)
com.glide.processors.AProcessor.runProcessor(AProcessor.java:553)
com.glide.processors.AProcessor.processTransaction(AProcessor.java:241)
com.glide.processors.ProcessorRegistry.process0(ProcessorRegistry.java:177)
com.glide.processors.ProcessorRegistry.process(ProcessorRegistry.java:166)
com.glide.ui.GlideServletTransaction.process(GlideServletTransaction.java:31)
com.glide.sys.Transaction.run(Transaction.java:2218)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:748)

and

Flow Designer: Failed to invoke public com.glide.flow.model.ComponentInstance() with no args
com.google.gson.internal.ConstructorConstructor$3.construct(ConstructorConstructor.java:107)
com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:162)
com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40)
com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:81)
com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93)
com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172)
com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40)
com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:81)
com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93)
com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172)
com.google.gson.Gson.fromJson(Gson.java:803)
com.google.gson.Gson.fromJson(Gson.java:768)
com.google.gson.Gson.fromJson(Gson.java:717)
com.google.gson.Gson.fromJson(Gson.java:689)
com.glide.flow_design.rest.FlowService.updateFlow(FlowService.java:437)
sun.reflect.GeneratedMethodAccessor2748.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
com.glide.rest.handler.impl.ServiceHandlerImpl.invokeService(ServiceHandlerImpl.java:44)
com.glide.rest.processors.RESTAPIProcessor.process(RESTAPIProcessor.java:286)
com.glide.processors.AProcessor.runProcessor(AProcessor.java:553)
com.glide.processors.AProcessor.processTransaction(AProcessor.java:241)
com.glide.processors.ProcessorRegistry.process0(ProcessorRegistry.java:177)
com.glide.processors.ProcessorRegistry.process(ProcessorRegistry.java:166)
com.glide.ui.GlideServletTransaction.process(GlideServletTransaction.java:31)
com.glide.sys.Transaction.run(Transaction.java:2218)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:748)
: no thrown error

Has anyone else experienced this madness with Flow Designer? I hope I don't have to recreate everything again.

[Pooja Devkar · Accepted solution]

Hello,

Its complaining of the payload length, for which the size needs to be changed.

Please check below link,

https://docs.servicenow.com/bundle/orlando-application-development/page/integrate/custom-web-service...

Also check Watch this video once.

Kindly mark correct & helpful; if my answer is useful to you.

Thanks & Regards,

Pooja Devkar

DxSherpa Technologies Pvt. Ltd

[ericgilmore]

The video was helpful. I redesigned my flow and got it working as expected. From my experience I'd say perhaps there's a limit to the number of times you can update, save, and activate before things get squirrelly.

[tantony]

Pooja,

In your experience by setting the glide.rest.max_content_length system property ,will it correct an already messed up flow as above outlined by @ericgilmore ?.I have the same error and same situation, toggling on and off  scripting for email body for a Service catalog 'Send Email' action.

[ericgilmore]

Ok, this has happened to me twice. Both times I'd spent quite a bit of time working and reworking my logic only to be foiled at the final step by this gremlin. What I had to do both times was just restart a brand new flow. That seemed to be the most efficient path. Thanks for your help though.