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https://issues.apache.org/jira/browse/HDFS-4249?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13507505#comment-13507505
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Suresh Srinivas commented on HDFS-4249:
---------------------------------------
Detailed changes proposed:
# Start the web server on the namenode before loading namespace.
# As namenode loads the namespace, print the following information (currently
present in logs):
#* Current startup state - loading fsimage/editlog/checkpointing/checkpointing
complete/waiting for registration of datanodes/safemode/startup complete.
#* A message when fsimage is loaded, the size of the fsimage loaded and time
taken
#* A message When editlog is loaded, the size of the edits and time taken
#* A message when checkpointing is complete and how long it took.
The information that is displayed on the webUI will also be made available over
JMX/http+JMX for monitoring and tooling purposes.
> Add status NameNode startup to webUI
> -------------------------------------
>
> Key: HDFS-4249
> URL: https://issues.apache.org/jira/browse/HDFS-4249
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 3.0.0
> Reporter: Suresh Srinivas
> Assignee: Suresh Srinivas
>
> Currently NameNode WebUI server starts only after the fsimage is loaded,
> edits are applied and checkpoint is complete. Any status related to namenode
> startin up is available only in the logs. I propose starting the webserver
> before loading namespace and providing namenode startup information.
> More details in the next comment.
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