Bug ID 805017: DB monitor marks pool member down if no send/recv strings are configured

Last Modified: Sep 11, 2019

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
15.0.0, 15.0.1

Opened: Jul 13, 2019
Severity: 3-Major

Symptoms

If an LTM database monitor type (MySQL, MSSQL, Oracle or PostgreSQL database monitor type) is configured without a 'send' string to issue a user-specified database query, pool members using this monitor are marked DOWN, even though a connection to the configured database completed successfully.

Impact

With this configuration, the monitor connects to the configured database, but does not issue a query or check for a specific response. Pool members are always marked DOWN when using a database monitor with no 'send' string configured.

Conditions

-- AnLTM pool or pool members are configured to us an LTM database (MySQL, MSSQL, Oracle or PostgreSQL) monitor type. -- No send string is configured for the monitor.

Workaround

To work around this issue, configure 'send' and 'recv' strings for the database monitor that will always succeed when successfully connected to the specified database (with the configured username and password, if applicable).

Fix Information

None

Behavior Change