Trigger wont be removed if JobConcurrentExecutionDisallowed is true and no nextFireTime set (Version 1.1.9)

[roeder82]

Given the following scenario:

• Job with isJobConcurrentExecutionDisallowed(job.getJobClass()) == true
• trigger.getNextFireTime() == null

In this case in RedisStorage.triggersFired the else case in line 744 ( jedis.hset(triggerHashKey, TRIGGER_NEXT_FIRE_TIME, "")) is not executed, as there is an else if else from "if (isJobConcurrentExecutionDisallowed(job.getJobClass()))", therefor the trigger wont be removed in RedisStorage.triggeredJobComplete line 818 (if(isNullOrEmpty(jedis.hget(triggerHashKey, TRIGGER_NEXT_FIRE_TIME)))) as the expression evaluates to false.

This leads to jobs running and running again even though the shall be deleted.