Seeing plenty of
```
java.lang.NullPointerException: Some(Null receiver values are not supported by libraries.)
at org.graalvm.truffle/com.oracle.truffle.api.library.LibraryFactory.dispatch(LibraryFactory.java:528)
at org.graalvm.truffle/com.oracle.truffle.api.library.LibraryFactory.getUncached(LibraryFactory.java:396)
at org.enso.interpreter.runtime.error.WarningsLibraryGen$UncachedDispatch.hasWarnings(WarningsLibraryGen.java:440)
at org.enso.interpreter.instrument.job.ProgramExecutionSupport$.sendExpressionUpdate(ProgramExecutionSupport.scala:366)
at org.enso.interpreter.instrument.job.ProgramExecutionSupport$.$anonfun$executeProgram$1(ProgramExecutionSupport.scala:62)
at org.enso.interpreter.instrument.job.ProgramExecutionSupport$.$anonfun$executeProgram$10(ProgramExecutionSupport.scala:151)
at java.base/java.lang.Iterable.forEach(Iterable.java:75)
at org.enso.interpreter.instrument.job.ProgramExecutionSupport$.executeProgram(ProgramExecutionSupport.scala:139)
at org.enso.interpreter.instrument.job.ProgramExecutionSupport$.$anonfun$runProgram$3(ProgramExecutionSupport.scala:217)
```
during execution of simple programs.
Added a guard to prevent us from sending expression updates when dealing with nulls.
close#7206
fixes
```
[error] [2023-07-04T08:43:55.015Z] [akka.actor.OneForOneStrategy] Cannot invoke "org.enso.interpreter.instrument.execution.CommandProcessor.stop()" because the return value of "org.enso.interpreter.instrument.Handler.commandProcessor()" is null
java.lang.NullPointerException: Some(Cannot invoke "org.enso.interpreter.instrument.execution.CommandProcessor.stop()" because the return value of "org.enso.interpreter.instrument.Handler.commandProcessor()" is null)
at org.enso.interpreter.instrument.Handler.onMessage(Handler.scala:119)
at org.enso.interpreter.instrument.Endpoint.$anonfun$sendBinary$1(Handler.scala:66)
at org.enso.interpreter.instrument.Endpoint.$anonfun$sendBinary$1$adapted(Handler.scala:64)
at scala.Option.foreach(Option.scala:437)
at org.enso.interpreter.instrument.Endpoint.sendBinary(Handler.scala:64)
at org.graalvm.truffle/com.oracle.truffle.api.instrumentation.TruffleInstrument$Env$MessageTransportProxy$MessageEndpointProxy.sendBinary(TruffleInstrument.java:1052)
at org.enso.languageserver.runtime.RuntimeConnector$$anonfun$initialized$1.applyOrElse(RuntimeConnector.scala:79)
at scala.runtime.AbstractPartialFunction.apply(AbstractPartialFunction.scala:35)
at org.enso.logger.akka.ActorLoggingReceive.apply(ActorLoggingReceive.scala:35)
at org.enso.logger.akka.ActorLoggingReceive.apply(ActorLoggingReceive.scala:14)
at scala.PartialFunction.applyOrElse(PartialFunction.scala:214)
at scala.PartialFunction.applyOrElse$(PartialFunction.scala:213)
at org.enso.logger.akka.ActorLoggingReceive.applyOrElse(ActorLoggingReceive.scala:14)
at scala.PartialFunction$Combined.applyOrElse(PartialFunction.scala:305)
at akka.actor.Actor.aroundReceive(Actor.scala:537)
at akka.actor.Actor.aroundReceive$(Actor.scala:535)
at org.enso.languageserver.runtime.RuntimeConnector.aroundReceive(RuntimeConnector.scala:20)
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:579)
at akka.actor.ActorCell.invoke(ActorCell.scala:547)
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:270)
at akka.dispatch.Mailbox.run(Mailbox.scala:231)
at akka.dispatch.Mailbox.exec(Mailbox.scala:243)
at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373)
at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182)
```
Package's config information, once loaded, never changed. While there is typically no need for it, this was problematic when the config became out-of-sync with the filesystem, like in the case of project rename action.
In rename, the config's properties would be updated in the FS, but that would never be reflected in module's package. Therefore further compilations would continue to ask for the old namespace.
Most of the changes are cosmetic (s/`.config`/`.getConfig()`) except for the new `reloadConfig` method on `Package` that is being called in `RenameProjectCmd` handler.
Closes#7062.
# Important Notes
The reported `ExecutionFailed` error should have been mostly fixed already via #7143. This change makes sure that all the related warnings are gone as well and the compiler uses the updated namespace.
`executionFailed` instead is sent when an evaulation finishes with a a critical failure or a non-critical error.
The PR tries to miniminally modify the change in the messages exchange so as to avoid a major redesign at this point.
Closes#7002.
# Important Notes
Unblocks IDE which will need to modify to this new setup.
Fixes#6955 by:
- using `visualisationModule` to specify the module where the visualization is to be used
- referring to method in `Meta.get_annotation` with `.method_name` - e.g. unresolved symbol notation
- evaluating arguments to `Meta.get_annotation` in the context of the user module (which can access the extension functions)
Request Timeouts started plaguing IDE due to numerous `executionContext/***Visualization` requests. While caused by a bug they revealed a bigger problem in the Language Server when serving large amounts of requests:
1) Long and short lived jobs are fighting for various locks. Lock contention leads to some jobs waiting for a longer than desired leading to unexpected request timeouts. Increasing timeout value is just delaying the problem.
2) Requests coming from IDE are served almost instantly and handled by various commands. Commands can issue further jobs that serve request. We apparently have and always had a single-thread thread pool for serving such jobs, leading to immediate thread starvation.
Both reasons increase the chances of Request Timeouts when dealing with a large number of requests. For 2) I noticed that while we used to set the `enso-runtime-server.jobParallelism` option descriptor key to some machine-dependent value (most likely > 1), the value set would **only** be available for instrumentation. `JobExecutionEngine` where it is actually used would always get the default, i.e. a single-threaded ThreadPool. This means that this option descriptor was simply misused since its introduction. Moved that option to runtime options so that it can be set and retrieved during normal operation.
Adding parallelism intensified problem 1), because now we could execute multiple jobs and they would compete for resources. It also revealed a scenario for a yet another deadlock scenario, due to invalid order of lock acquisition. See `ExecuteJob` vs `UpsertVisualisationJob` order for details.
Still, a number of requests would continue to randomly timeout due to lock contention. It became apparent that
`Attach/Modify/Detach-VisualisationCmd` should not wait until a triggered `UpsertVisualisationJob` sends a response to the client; long and short lived jobs will always compete for resources and we cannot guarantee that they will not timeout that way. That is why the response is sent immediately from the command handler and not from the job executed after it.
This brings another problematic scenario:
1. `AttachVisualisationCmd` is executed, response sent to the client, `UpsertVisualisationJob` scheduled.
2. In the meantime `ModifyVisualisationCmd` comes and fails; command cannot find the visualization that will only be added by `UpsertVisualisationJob`, which might have not yet been scheduled to run.
Remedied that by checking visualisation-related jobs that are still in progress. It also allowed for cancelling jobs which results wouldn't be used anyway (`ModifyVisualisationCmd` sends its own `UpsertVisualisationJob`). This is not a theoretical scenario, it happened frequently on IDE startup.
This change does not fully solve the rather problematic setup of numerous locks, which are requested by short and long lived jobs. A better design should still be investigated. But it significantly reduces the chances of Request Timeouts which IDE had to deal with.
With this change I haven't been able to experience Request Timeouts for relatively modest projects anymore.
I added the possibility of logging wait times for locks to better investigate further problems.
Closes#7005
There was an inherent race condition between edit, close & open commands which could not be prevented solely using locks. `EditFileCmd` triggered `EnsureCompiledJob` which was applying edits collected over time. At the same `CloseFileCmd` and `OpenFileCmd` were executed asynchronously and required locks on compilation unit and file lock.
Additionally, open file was resetting the module's runtime source irrespective of any edits that could already have been applied with the asynchronous execution in `EnsureCompiledJob`. This was visible especially during early manipulation of the project when open/close was performed due to a bug in IDE (#6843).
Now commands can be run either synchronously or asynchronously. Only that way can we ensure that `close` & `open` commands finish by the time any editions are being applied to module's sources.
Closes#6841.
# Important Notes
In the given video, `"foo"` would be greyed out because it would never be part of the module's (runtime) sources. Therefore no IR would be generated for it or instrumentation, meaning it would be present in `expressionUpdates` information necessary for IDE.
[Kazam_screencast_00014.webm](https://github.com/enso-org/enso/assets/292128/226a17b8-729a-415a-803f-003a9695b2f1)
