dnsdist: negative real-memory-usage metric

[paddg]

• Program: dnsdist
• Issue type: Bug report

Short description

After a while dnsdist provides negative real-memory-usage if queried over built-in webserver.

Environment

• Operating system: SLES12-SP2
• Software version: dnsdist 1.2.0
• Software source: self compiled

Steps to reproduce

Negative value after about 3 days run time:

curl --silent -H 'X-API-Key: xxxxxx' http://127.0.0.1:7070/api/v1/servers/localhost/statistics | jsonpretty | grep -A2 real-memory-usage
        "name": "real-memory-usage",
        "type": "StatisticItem",
        "value": -1715232768

While dumpStats() shows still the correct value:

dnsdist -e "dumpStats()" | grep  real-memory-usage
empty-queries                 19799    real-memory-usage         6874710016

Expected behaviour

Correct value for real-memory-usage metric

Actual behaviour

Wrong and negative value

Other information

Usecase

Description