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Home > Success Center > New Articles > Poll failure results in 0 in statistic data and causes sudden drop in charts (SAM)

Poll failure results in 0 in statistic data and causes sudden drop in charts (SAM)

Updated: 11/14/2017

Overview

When SAM poll fails (for example, due to monitored DB outage), statistic data in SAM displays as 0 but should appears as NULL (N/A). The drop to 0 has a negative charts; drops appears instead of gaps between successful polls. For statistics where zero is untypical or even invalid value, charts are damaged and lose informative value. When historical data is aggregated, minimum and average values are incorrect.

SAM-6274 chart example.png

Environment

  • 6.4 Hotfix 2 and later

 

Cause 

Data returned is 0, resulting in chart dips and problems with minimum and average values for aggregated data. Tracked by SAM-6274, this issue was fixed in other components already. The statistic value from a failed poll should be NULL (N/A in UI) and the MIN/MAX chart should include a gap for failed polls.

Resolution

Fix in SAM 7.0 stretch, per by SAM-6274. No Customer Issues logged as of 11/14/17.

 

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Internal Use Only