[ZEPPELIN-3250] Appropriate error message should be shown to user if interpreter binding fails

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.7.0
• Fix Version/s: 0.7.0
• Component/s: zeppelin-interpreter
• Assignee: Unassigned
• Reporter: Supreeth Sharma
• Created: 20/Feb/18 14:42
• Updated: 20/Feb/18 23:16

Description

Appropriate error message should be shown to user if interpreter binding fails.

Steps to reproduce the issue :
1) Create a new notebook
2) Add a para to the notebook with interpreter spark.sql (interpreter which is not registered in zeppelin)
3) Try to change interpreter bindings. ie deselect angular and save it.
Operation fails with below exception :

==> /grid/0/log/zeppelin/zeppelin-zeppelin-ctr-e138-1518143905142-29848-01-000004.hwx.site.log <==
 INFO [2018-02-20 14:38:47,803] ({qtp604125138-823} FileSystemConfigStorage.java[call]:98) - Save Interpreter Settings to hdfs://mycluster/user/zeppelin/conf/interpreter.json
 INFO [2018-02-20 14:38:47,836] ({qtp604125138-823} FileSystemConfigStorage.java[call]:143) - Save notebook authorization to file: hdfs://mycluster/user/zeppelin/conf/notebook-authorization.json
 INFO [2018-02-20 14:38:47,856] ({qtp604125138-823} FileSystemConfigStorage.java[call]:143) - Save notebook authorization to file: hdfs://mycluster/user/zeppelin/conf/notebook-authorization.json
 INFO [2018-02-20 14:38:47,869] ({qtp604125138-823} FileSystemConfigStorage.java[call]:143) - Save notebook authorization to file: hdfs://mycluster/user/zeppelin/conf/notebook-authorization.json
 INFO [2018-02-20 14:38:47,900] ({qtp604125138-823} FolderView.java[onNoteNameChanged]:205) - Note name changed:  -> test
 INFO [2018-02-20 14:38:47,900] ({qtp604125138-823} Folder.java[addNote]:184) - Add note 2D64BH3K1 to folder /
 INFO [2018-02-20 14:38:48,197] ({qtp604125138-821} NotebookServer.java[sendNote]:711) - New operation from 10.200.5.34 : 52682 : hrt_1 : GET_NOTE : 2D64BH3K1
 WARN [2018-02-20 14:38:48,198] ({qtp604125138-821} FileSystemNotebookRepo.java[revisionHistory]:171) - revisionHistory is not implemented for HdfsNotebookRepo
ERROR [2018-02-20 14:38:55,954] ({qtp604125138-821} NotebookServer.java[onMessage]:358) - Can't handle message
org.apache.zeppelin.interpreter.InterpreterException: spark.sql interpreter not found
	at org.apache.zeppelin.interpreter.InterpreterFactory.getInterpreter(InterpreterFactory.java:417)
	at org.apache.zeppelin.socket.NotebookServer.getEditorSetting(NotebookServer.java:2212)
	at org.apache.zeppelin.socket.NotebookServer.onMessage(NotebookServer.java:346)
	at org.apache.zeppelin.socket.NotebookSocket.onWebSocketText(NotebookSocket.java:59)
	at org.eclipse.jetty.websocket.common.events.JettyListenerEventDriver.onTextMessage(JettyListenerEventDriver.java:128)
	at org.eclipse.jetty.websocket.common.message.SimpleTextMessage.messageComplete(SimpleTextMessage.java:69)
	at org.eclipse.jetty.websocket.common.events.AbstractEventDriver.appendMessage(AbstractEventDriver.java:65)
	at org.eclipse.jetty.websocket.common.events.JettyListenerEventDriver.onTextFrame(JettyListenerEventDriver.java:122)
	at org.eclipse.jetty.websocket.common.events.AbstractEventDriver.incomingFrame(AbstractEventDriver.java:161)
	at org.eclipse.jetty.websocket.common.WebSocketSession.incomingFrame(WebSocketSession.java:309)
	at org.eclipse.jetty.websocket.common.extensions.ExtensionStack.incomingFrame(ExtensionStack.java:214)
	at org.eclipse.jetty.websocket.common.Parser.notifyFrame(Parser.java:220)
	at org.eclipse.jetty.websocket.common.Parser.parse(Parser.java:258)
	at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.readParse(AbstractWebSocketConnection.java:632)
	at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.onFillable(AbstractWebSocketConnection.java:480)
	at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
	at java.lang.Thread.run(Thread.java:748)
 INFO [2018-02-20 14:38:56,698] ({qtp604125138-823} NotebookServer.java[broadcastNewParagraph]:647) - Broadcasting paragraph on run call instead of note.
ERROR [2018-02-20 14:38:56,727] ({qtp604125138-823} NotebookServer.java[persistAndExecuteSingleParagraph]:1652) - Exception from run

Instead of failing the operation silently, its better to show appropriate error message to user.