Metricbeat MongoDB Connection Leak

[andrewkroh]

Each of the MongoDB metricsets (status, dbstats) create a new session for each Fetch by do not close the session that they open. Each metricset should have a defer session.Close() (or similar).

beats/metricbeat/module/mongodb/status/status.go

Line 62 in 84e2e09

mongoSession, err := mongodb.NewDirectSession(m.dialInfo)

beats/metricbeat/module/mongodb/dbstats/dbstats.go

Line 60 in 84e2e09

mongoSession, err := mongodb.NewDirectSession(m.dialInfo)

For confirmed bugs, please report:

• Version: 5.x / 6.x
• Operating System: all
• Discuss: https://discuss.elastic.co/t/metricbeat-mongodb-leaks-connections-when-metricbeat-config-modules-reload-enabled-set-to-true/108723?u=andrewkroh
• Steps to Reproduce: Enable the mongodb module.

[andrewkroh]

I haven't verified this bug. My report is based on code inspection and a user report from Discuss.