Github user jongyoul commented on the issue:
https://github.com/apache/zeppelin/pull/3167
I have a similar issue. Jetty's scheulder became stocked.
```
[zeppelin@host ~]$ cat
/var/log/zeppelin/zeppelin-zeppelin-zeppelin001-datachain-jp2p-prod.log | grep
WebSocketException
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
javax.servlet.ServletException:
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint unavailable,
outgoing connection not open
Caused by: org.eclipse.jetty.websocket.api.WebSocketException:
RemoteEndpoint unavailable, outgoing connection not open
javax.servlet.ServletException:
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint unavailable,
outgoing connection not open
Caused by: org.eclipse.jetty.websocket.api.WebSocketException:
RemoteEndpoint unavailable, outgoing connection not open
WARN [2018-09-12 11:24:27,674] ({qtp1486371051-6163}
HttpChannel.java[handleException]:482) - Could not send response error 500:
javax.servlet.ServletException:
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint unavailable,
outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
javax.servlet.ServletException:
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint unavailable,
outgoing connection not open
Caused by: org.eclipse.jetty.websocket.api.WebSocketException:
RemoteEndpoint unavailable, outgoing connection not open
javax.servlet.ServletException:
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint unavailable,
outgoing connection not open
Caused by: org.eclipse.jetty.websocket.api.WebSocketException:
RemoteEndpoint unavailable, outgoing connection not open
WARN [2018-09-12 16:51:21,441] ({qtp1486371051-8251}
HttpChannel.java[handleException]:482) - Could not send response error 500:
javax.servlet.ServletException:
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint unavailable,
outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
org.eclipse.jetty.websocket.api.WebSocketException: RemoteEndpoint
unavailable, outgoing connection not open
```
---
