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Improve alarmd Drools engine performance by using STREAM mode

Description

In NMS-12322 we switched from using STREAM mode to CLOUD mode to work around a memory leak in Drools.

Since then, we've been able to isolate the memory leak, reproduce it, and have it fixed upstream: https://issues.jboss.org/browse/DROOLS-4805

Drools 7.31.0.Final now includes a patch for the problem so we can look at upgrading Drools and going back to STREAM mode. STREAM mode has the benefit of being much more performant and respsonsive than CLOUD mode for our use case.

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Jesse White December 18, 2019 at 1:54 AM

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PagerDuty

Created December 18, 2019 at 1:44 AM
Updated December 20, 2019 at 2:54 AM
Resolved December 20, 2019 at 2:54 AM