[jira] Created: (TS-570) SplitDNS schedules on wrong thread when "dns_threads > 0"

[qianshi (JIRA)]

SplitDNS schedules on wrong thread when "dns_threads > 0"
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                 Key: TS-570
                 URL: https://issues.apache.org/jira/browse/TS-570
             Project: Traffic Server
          Issue Type: Bug
          Components: DNS
    Affects Versions: 2.1.5
         Environment: 2.1.5 trunk
            Reporter: qianshi
            Priority: Minor


In main() function, SplitDNSConfig::startup() is called before 
dnsProcessor.start() like 1. 
In SplitDNSConfig::startup(), reconfigure() schedule threads like 2. 
In dnsProcessor.start(), create threads for dns and split dns like 3.

So when split dns is enable and dns threads more than 0, split dns uses no the 
dns threads which created to do so but 0 thread, that may be not the initial 
purpose of creating the dedicated threads for dns and split dns.

1.
    SplitDNSConfig::startup();
    dnsProcessor.start();

2.
  EThread *thread = eventProcessor.eventthread[ET_DNS][0];
  thread->schedule_imm(dnsH, ET_DNS);

3.
  ET_DNS = eventProcessor.spawn_event_threads(dns_threads);



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