Malformed Class Name error on Nested Class Names

[madsmith]

Took a while to track down the cause of this issue. I was having issues invoking Dynamo operations with the API. Eventually, I tried the simple example QuickStart (blocking using nonblocking api) that is at the top of the Readme and it raised the following error. Looks like there's an issue with calling getSimpleName() on nested scala classes.

Moving the case class definition for Person out of the try (or better yet out of the object) changes the way the object's classname is generated which circumvents the error.

Ultimately, this is a scala/java bug where scala's classnames are at times incompatible with java.lang.class.getSimpleName(). I'd recommend not using getSimpleName in DynamicObject.

See https://issues.scala-lang.org/browse/SI-2034 for background.

[info] Running QuckStart
[info] [ERROR] [06/19/2013 20:26:41.937] [Dynamo-dynamo-connection-dispatcher-5] [akka://Dynamo/user/DynamoClient/DynamoConnection/$a] AmazonDB Error [Malformed class name] while executing [TableExists(asyncdynamo.DynamoObject$$anon$1@6af2da21)]. To see the operation origin please add -Dasyncdynamo.debug system property.
[info] asyncdynamo.ThirdPartyException: AmazonDB Error [Malformed class name] while executing [TableExists(asyncdynamo.DynamoObject$$anon$1@6af2da21)]. To see the operation origin please add -Dasyncdynamo.debug system property.
[info]  at asyncdynamo.DbOperation.safeExecute(DbOperation.scala:49)
[info]  at asyncdynamo.Dynamo$$anonfun$receive$1$$anonfun$1$$anonfun$apply$1.apply(Dynamo.scala:53)
[info]  at asyncdynamo.AmazonThrottlingRecoveryStrategy.onExecute(ThrottlingRecoveryStrategy.scala:18)
[info]  at asyncdynamo.Dynamo$$anonfun$receive$1$$anonfun$1.apply(Dynamo.scala:53)
[info]  at asyncdynamo.Dynamo.asyncdynamo$Dynamo$$time(Dynamo.scala:75)
[info]  at asyncdynamo.Dynamo$$anonfun$receive$1.liftedTree1$1(Dynamo.scala:53)
[info]  at asyncdynamo.Dynamo$$anonfun$receive$1.applyOrElse(Dynamo.scala:52)
[info]  at akka.actor.ActorCell.receiveMessage(ActorCell.scala:425)
[info]  at akka.actor.ActorCell.invoke(ActorCell.scala:386)
[info]  at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:230)
[info]  at akka.dispatch.Mailbox.run(Mailbox.scala:212)
[info]  at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
[info]  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
[info]  at java.lang.Thread.run(Thread.java:680)
[info] Caused by: java.lang.InternalError: Malformed class name
[info]  at java.lang.Class.getSimpleName(Class.java:1135)
[info]  at asyncdynamo.DynamoObject$.className$lzycompute$1(DynamoObject.scala:67)
[info]  at asyncdynamo.DynamoObject$.asyncdynamo$DynamoObject$$className$1(DynamoObject.scala:67)
[info]  at asyncdynamo.DynamoObject$$anon$1.table(DynamoObject.scala:75)
[info]  at asyncdynamo.DynamoObject$class.table(DynamoObject.scala:31)
[info]  at asyncdynamo.DynamoObject$$anon$1.table(DynamoObject.scala:70)
[info]  at asyncdynamo.nonblocking.TableExists.execute(admin-operations.scala:63)
[info]  at asyncdynamo.nonblocking.TableExists.execute(admin-operations.scala:61)
[info]  at asyncdynamo.DbOperation.safeExecute(DbOperation.scala:44)
[info]  ... 13 more
[info]
[info] [ERROR] [06/19/2013 20:26:41.946] [Dynamo-akka.actor.default-dispatcher-2] [akka://Dynamo/user/DynamoClient/DynamoConnection] AmazonDB Error [Malformed class name] while executing [TableExists(asyncdynamo.DynamoObject$$anon$1@6af2da21)]. To see the operation origin please add -Dasyncdynamo.debug system property.
[info] asyncdynamo.ThirdPartyException: AmazonDB Error [Malformed class name] while executing [TableExists(asyncdynamo.DynamoObject$$anon$1@6af2da21)]. To see the operation origin please add -Dasyncdynamo.debug system property.
[info]  at asyncdynamo.DbOperation.safeExecute(DbOperation.scala:49)
[info]  at asyncdynamo.Dynamo$$anonfun$receive$1$$anonfun$1$$anonfun$apply$1.apply(Dynamo.scala:53)
[info]  at asyncdynamo.AmazonThrottlingRecoveryStrategy.onExecute(ThrottlingRecoveryStrategy.scala:18)
[info]  at asyncdynamo.Dynamo$$anonfun$receive$1$$anonfun$1.apply(Dynamo.scala:53)
[info]  at asyncdynamo.Dynamo.asyncdynamo$Dynamo$$time(Dynamo.scala:75)
[info]  at asyncdynamo.Dynamo$$anonfun$receive$1.liftedTree1$1(Dynamo.scala:53)
[info]  at asyncdynamo.Dynamo$$anonfun$receive$1.applyOrElse(Dynamo.scala:52)
[info]  at akka.actor.ActorCell.receiveMessage(ActorCell.scala:425)
[info]  at akka.actor.ActorCell.invoke(ActorCell.scala:386)
[info]  at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:230)
[info]  at akka.dispatch.Mailbox.run(Mailbox.scala:212)
[info]  at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
[info]  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
[info]  at java.lang.Thread.run(Thread.java:680)
[info] Caused by: java.lang.InternalError: Malformed class name
[info]  at java.lang.Class.getSimpleName(Class.java:1135)
[info]  at asyncdynamo.DynamoObject$.className$lzycompute$1(DynamoObject.scala:67)
[info]  at asyncdynamo.DynamoObject$.asyncdynamo$DynamoObject$$className$1(DynamoObject.scala:67)
[info]  at asyncdynamo.DynamoObject$$anon$1.table(DynamoObject.scala:75)
[info]  at asyncdynamo.DynamoObject$class.table(DynamoObject.scala:31)
[info]  at asyncdynamo.DynamoObject$$anon$1.table(DynamoObject.scala:70)
[info]  at asyncdynamo.nonblocking.TableExists.execute(admin-operations.scala:63)
[error] asyncdynamo.ThirdPartyException: AmazonDB Error: [AmazonDB Error [Malformed class name] while executing [TableExists(asyncdynamo.DynamoObject$$anon$1@6af2da21)]. To see the operation origin please add -Dasyncdynamo.debug system property.] while executing [Some(PendingOperation(TableExists(asyncdynamo.DynamoObject$$anon$1@6af2da21),Deadline(1371691611687620000 nanoseconds)))]
[info]  at asyncdynamo.nonblocking.TableExists.execute(admin-operations.scala:61)
[error]         at asyncdynamo.Dynamo.preRestart(Dynamo.scala:70)
[info]  at asyncdynamo.DbOperation.safeExecute(DbOperation.scala:44)
[info]  ... 13 more
[info]
[error]         at akka.actor.dungeon.FaultHandling$class.faultRecreate(FaultHandling.scala:67)
[error]         at akka.actor.ActorCell.faultRecreate(ActorCell.scala:306)
[error]         at akka.actor.ActorCell.systemInvoke(ActorCell.scala:356)
[error]         at akka.dispatch.Mailbox.processAllSystemMessages(Mailbox.scala:256)
[error]         at akka.dispatch.Mailbox.run(Mailbox.scala:211)
[error]         at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
[error]         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
[error]         at java.lang.Thread.run(Thread.java:680)
[error] Caused by: asyncdynamo.ThirdPartyException: AmazonDB Error [Malformed class name] while executing [TableExists(asyncdynamo.DynamoObject$$anon$1@6af2da21)]. To see the operation origin please add -Dasyncdynamo.debug system property.
[error]         at asyncdynamo.DbOperation.safeExecute(DbOperation.scala:49)
[error]         at asyncdynamo.Dynamo$$anonfun$receive$1$$anonfun$1$$anonfun$apply$1.apply(Dynamo.scala:53)
[error]         at asyncdynamo.AmazonThrottlingRecoveryStrategy.onExecute(ThrottlingRecoveryStrategy.scala:18)
[error]         at asyncdynamo.Dynamo$$anonfun$receive$1$$anonfun$1.apply(Dynamo.scala:53)
[error]         at asyncdynamo.Dynamo.asyncdynamo$Dynamo$$time(Dynamo.scala:75)
[error]         at asyncdynamo.Dynamo$$anonfun$receive$1.liftedTree1$1(Dynamo.scala:53)
[error]         at asyncdynamo.Dynamo$$anonfun$receive$1.applyOrElse(Dynamo.scala:52)
[error]         at akka.actor.ActorCell.receiveMessage(ActorCell.scala:425)
[error]         at akka.actor.ActorCell.invoke(ActorCell.scala:386)
[error]         at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:230)
[error]         at akka.dispatch.Mailbox.run(Mailbox.scala:212)
[error]         ... 3 more
[error] Caused by: java.lang.InternalError: Malformed class name
[error]         at java.lang.Class.getSimpleName(Class.java:1135)
[error]         at asyncdynamo.DynamoObject$.className$lzycompute$1(DynamoObject.scala:67)
[error]         at asyncdynamo.DynamoObject$.asyncdynamo$DynamoObject$$className$1(DynamoObject.scala:67)
[error]         at asyncdynamo.DynamoObject$$anon$1.table(DynamoObject.scala:75)
[error]         at asyncdynamo.DynamoObject$class.table(DynamoObject.scala:31)
[error]         at asyncdynamo.DynamoObject$$anon$1.table(DynamoObject.scala:70)
[error]         at asyncdynamo.nonblocking.TableExists.execute(admin-operations.scala:63)
[error]         at asyncdynamo.nonblocking.TableExists.execute(admin-operations.scala:61)
[error]         at asyncdynamo.DbOperation.safeExecute(DbOperation.scala:44)
[error]         ... 13 more

[glidester]

Could you provide a demonstrating example and I'll try and take a look at this.

[alexanderdean]

This is still live in 2.0.0. We should fix it as it affects the README's example, which is very confusing for new starters...

[petervandenabeele]

Confirmed ... I just hit this as a starter (found this issue via Googling the issue).

Thanks for the explanation :-)

[sathish-io]

I do face this problem while running QuickStart example. What is the fix ?
I am trying to evaluate AWScala vs async-dynamo.

[sathish-io]

Between, I am using following library dependency,

resolvers += Resolver.bintrayRepo("zzztimbo", "maven")
libraryDependencies += "com.github.piotrga" % "async-dynamo_2.10" % "2.0.1.14" withSources()