[ZEPPELIN-292] Zeppelin UI hands to get loaded for several minutes in the beginning

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Not A Problem
• Affects Version/s: 0.6.0
• Fix Version/s: 0.5.5
• Component/s: GUI
• Labels: EMR javascript

Environment

Amazon EMR [Release label:emr-4.0.0 Hadoop distribution:Amazon 2.6.0 Applications:Hive 1.0.0, Spark 1.4.1]
Server is m3.xlarge

zeppelin-env.sh:
export MASTER=yarn-client
export HADOOP_CONF_DIR=/etc/hadoop/conf
export ZEPPELIN_JAVA_OPTS=" -Dspark.jars=/usr/lib/hadoop/,/usr/lib/hadoop/../hadoop-hdfs/,/usr/lib/hadoop/../hadoop-mapreduce/,/usr/lib/hadoop/../hadoop-yarn/,/usr/lib/hadoop/../hadoop-lzo/lib/,/usr/share/aws/emr/emrfs/conf,/usr/share/aws/emr/emrfs/lib/,/usr/share/aws/emr/emrfs/auxlib/,/usr/lib/hadoop/,/usr/lib/hadoop/../hadoop-hdfs/,/usr/lib/hadoop/../hadoop-mapreduce/,/usr/lib/hadoop/../hadoop-yarn/,/usr/lib/hadoop/../hadoop-lzo/lib/,/usr/share/aws/emr/emrfs/conf,/usr/share/aws/emr/emrfs/lib/,/usr/share/aws/emr/emrfs/auxlib/"

• Assignee: Unassigned
• Reporter: Eugene Sapozhnikov
• Created: 08/Sep/15 18:03
• Updated: 05/Nov/15 14:54
• Resolved: 10/Sep/15 10:10

Description

I installed Zeppelin on EMR cluster this Spark using this script:
https://gist.github.com/snowindy/008f3e8b878a23c00679 (I made it myself)

When I navigate to http://localhost:8080 (I use ssh proxy) I see page is pending to get loaded, hanged forever with white screen and spinning status.

When I did 'curl http://localhost:8080' from master host of my cluster, to avoid network issues, I see this:
https://gist.github.com/snowindy/f7c473d813cb3f1433cc

Note there is no ending html tag, like page is not loaded fully.

I also headed to http://localhost:8080/scripts/scripts.js via browser and saw that this JS file hands to get loaded too.

After 3-5 minutes of Zeppelin UI not loading, it starts to load okay. Since then everything is fine.

Is it a bug with servlet container?