[TOREE-485] Not able to run Toree kernel in JupyterLab 0.34

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.3.0
• Environment: Ubuntu 18.04, Python 3.6.6, JupyterLab v0.34.12, Apache Toree 0.2.0-rc6
• Assignee: Luciano Resende
• Reporter: Sergey Kuznetsov
• Created: 26/Sep/18 12:37
• Updated: 08/Oct/18 21:47
• Resolved: 01/Oct/18 12:26

Description

Hello! I've been using Toree kernel in JupyterLab (Python 2.7) versions 0.32 and 0.33 for some time and it worked great. Recently I updated JupyterLab to version 0.34 that supports only Python 3 and now I'm not ably to run Scala code in Toree. The kernel starts fine, without any warnings, but once I executed the cell with simple import I get the following error:

ERROR OneForOneStrategy:159 - JsResultException(errors:List((/deletedCells,List(ValidationError(error.expected.jsstring,WrappedArray())))))
play.api.libs.json.JsResultException: JsResultException(errors:List((/deletedCells,List(ValidationError(error.expected.jsstring,WrappedArray())))))
  at play.api.libs.json.JsValue$$anonfun$2.apply(JsValue.scala:67)
  at play.api.libs.json.JsValue$$anonfun$2.apply(JsValue.scala:67)
  at play.api.libs.json.JsResult$class.fold(JsResult.scala:77)
  at play.api.libs.json.JsError.fold(JsResult.scala:13)
  at play.api.libs.json.JsValue$class.as(JsValue.scala:65)
  at play.api.libs.json.JsObject.as(JsValue.scala:166)
  at org.apache.toree.kernel.protocol.v5.kernel.Utilities$.ZMQMessageToKernelMessage(Utilities.scala:69)
  at org.apache.toree.kernel.protocol.v5.kernel.socket.ZeromqKernelMessageSocket$$anonfun$receive$1.applyOrElse(ZeromqKernelMessageSocket.scala:48)
  at akka.actor.Actor$class.aroundReceive(Actor.scala:502)
  at org.apache.toree.kernel.protocol.v5.kernel.socket.ZeromqKernelMessageSocket.aroundReceive(ZeromqKernelMessageSocket.scala:39)
  at akka.actor.ActorCell.receiveMessage(ActorCell.scala:526)
  at akka.actor.ActorCell.invoke(ActorCell.scala:495)
  at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:257)
  at akka.dispatch.Mailbox.run(Mailbox.scala:224)
  at akka.dispatch.Mailbox.exec(Mailbox.scala:234)
  at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
  at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
  at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
  at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
2018-09-26 14:45:29 ERROR ZeroMQSocketRunnable:167 - Unexpected exception in 0mq socket runnable!
org.zeromq.ZMQException: Errno 48 : Address already in use
  at org.zeromq.ZMQ$Socket.mayRaise(ZMQ.java:1425)
  at org.zeromq.ZMQ$Socket.bind(ZMQ.java:1187)
  at org.zeromq.ZMQ$Socket.bind(ZMQ.java:1148)
  at org.apache.toree.communication.socket.ZeroMQSocketRunnable$$anonfun$processOptions$2.apply(ZeroMQSocketRunnable.scala:88)
  at org.apache.toree.communication.socket.ZeroMQSocketRunnable$$anonfun$processOptions$2.apply(ZeroMQSocketRunnable.scala:87)
  at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
  at scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:35)
  at org.apache.toree.communication.socket.ZeroMQSocketRunnable.processOptions(ZeroMQSocketRunnable.scala:87)
  at org.apache.toree.communication.socket.ZeroMQSocketRunnable.run(ZeroMQSocketRunnable.scala:144)
  at java.lang.Thread.run(Thread.java:748)

I tried to update Toree: install with pip3 the latest rc6 release, but the issue remains. Is there any way to fix this?

 

Thanks,

Sergey

Issue Links

• duplicates: TOREE-489 Apache Toree kernel throw error when executing code in jupyter lab
• links to: GitHub Pull Request #165