Apache Zeppelin - Disconnected status - apache-zeppelin

Question

I have successfully installed and started Zeppelin on ec2 cluster with spark 1.3 and hadoop 2.4.1 on yarn.(as given in https://github.com/apache/incubator-zeppelin)
However, I see zeppelin started with 'disconnected' status (on the right corner).
As per log, I find that both the zeppelin port and the websocket port (zeppeling port + 1) have been started with no error. Also, both the ports are not used by any other process and I see
zeppelin process (pid) running on both the ports. The IP table is blank.
log:
INFO [2015-06-30 03:20:31,294] ({main} QuartzScheduler.java[initialize]:305) - Scheduler meta-data: Quartz Scheduler (v2.2.1) 'DefaultQuartzScheduler' with instanceId 'NON_CLUSTERED'
Scheduler class: 'org.quartz.core.QuartzScheduler' - running locally.
NOT STARTED.
Currently in standby mode.
Number of jobs executed: 0
Using thread pool 'org.quartz.simpl.SimpleThreadPool' - with 10 threads.
Using job-store 'org.quartz.simpl.RAMJobStore' - which does not support persistence. and is not clustered.
INFO [2015-06-30 03:20:31,294] ({main} StdSchedulerFactory.java[instantiate]:1339) - Quartz scheduler 'DefaultQuartzScheduler' initialized from default resource file in Quartz package: 'quartz.properties'
INFO [2015-06-30 03:20:31,294] ({main} StdSchedulerFactory.java[instantiate]:1343) - Quartz scheduler version: 2.2.1
INFO [2015-06-30 03:20:31,295] ({main} QuartzScheduler.java[start]:575) - Scheduler DefaultQuartzScheduler_$_NON_CLUSTERED started.
INFO [2015-06-30 03:20:31,510] ({main} ServerImpl.java[initDestination]:94) - Setting the server's publish address to be /
INFO [2015-06-30 03:20:31,625] ({main} StandardDescriptorProcessor.java[visitServlet]:284) - NO JSP Support for /, did not find org.apache.jasper.servlet.JspServlet
INFO [2015-06-30 03:20:32,374] ({main} AbstractConnector.java[doStart]:338) - Started SocketConnector#0.0.0.0:8083
INFO [2015-06-30 03:20:32,374] ({main} ZeppelinServer.java[main]:108) - Started
INFO [2015-06-30 03:20:30,181] ({main} ZeppelinConfiguration.java[create]:98) - Load configuration from file:/home/ec2-user/incubator-zeppelin/conf/zeppelin-site.xml
INFO [2015-06-30 03:20:30,336] ({main} NotebookServer.java[creatingwebSocketServerLog]:65) - Create zeppelin websocket on 0.0.0.0:8084
INFO [2015-06-30 03:20:30,537] ({main} ZeppelinServer.java[main]:106) - Start zeppelin server
INFO [2015-06-30 03:20:30,539] ({main} Server.java[doStart]:272) - jetty-8.1.14.v20131031
zeppelin-env.sh:
export ZEPPELIN_PORT=8083
export HADOOP_CONF_DIR=/mnt/disk1/hadoop-2.4.1/etc/hadoop
export SPARK_HOME=/mnt/disk2/spark
In zeppelin-site.xml, I have only set server ip address and port and -1 for websocket port.
When I access websocket port thru chorme I get "no data received..err_empty_reponse" and "Unable to load the webpage because the server sent no data' error.
Am I missing anything during installation or in configuration? Any help is appreciated. Thanks.

Answer 1

I have some experiences using apache zeppelin with IE or Chrome. Just add the your IP address into trusted sites with internet option. Close the IE or Chrome and restart it. And then opening IE or Chrome browser, you can see main page of apache zeppelin.

Answer 2

Try to set the property zeppelin.server.allowed.origins to *in the conf/zeppelin-site.xmland check if it's a websocket issue. After you can list the origins that you would like to allow.