Slow namenode webUI (Taking 1 minute to load on 2000 nodes cluster.)
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Key: HADOOP-3909
URL: https://issues.apache.org/jira/browse/HADOOP-3909
Project: Hadoop Core
Issue Type: Improvement
Components: dfs
Affects Versions: 0.17.1
Reporter: Koji Noguchi
Showing the namenode webui takes a long time with large cluster
and also adds high cpu load to the namenode.
Is this expected?
WHILE pulling the namenode webUI, top showed
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
20957 hadoop 16 0 20.3g 19g 4732 S 131 63.7 9767:05 java
AFTER the pull
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
20957 hadoop 16 0 20.3g 19g 4732 S 24 63.7 9768:12 java
It would be nice if we can improve this especially since we tend to hit the webUI when namenode
is having trouble.
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