Zoom into a chart region doesn't work when there are null values on the chart
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Key: CHUKWA-277
URL: https://issues.apache.org/jira/browse/CHUKWA-277
Project: Hadoop Chukwa
Issue Type: Bug
Components: User Interface
Affects Versions: 0.1.2, 0.2.0
Environment: Redhat EL 5.1, Java 6
Reporter: Eric Yang
Assignee: Eric Yang
When there are null values on the chart, zoom doesn't work. The calculation of
average and stddev causes exception when there are null values in the metrics.
The exception prevent the chart rendering code path to be executed, hence the
chart zoom stops working.
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