Question

i wanna to write a SQL script to get the misfire jobs,
There is some tables like QRTZ_TRIGGERS,
how can i implement the sql?
maybe compare next_fire_time + misfireThreshold< now()?

Answer 1

It goes something like this:

SELECT TRIGGER_NAME
FROM QRTZ_TRIGGERS
WHERE NOT (MISFIRE_INSTR = -1)
  AND NEXT_FIRE_TIME < 1345050693000 
  AND TRIGGER_STATE = 'WAITING'

Basically you ask for all waiting triggers with NEXT_FIRE_TIME parameter far in the past. How far? Quartz assumes all triggers that are more than org.quartz.jobStore.misfireThreshold late are misfired. By default Quartz treats trigger as misfired if it was scheduled to run more than a minute ago. So take:

new Date() - 60 * 1000 * 1000

See StdJDBCConstants for more details.