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  1. ActiveMQ
  2. AMQ-6028

DNS search domain is dropped when looking up failover

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      We have a setup with a network of two brokers. They're running on broker1.foo.bar.com and broker2.foo.bar.com.

      We have a producer on producer.bar.com which would not failover when one of the brokers went down. We're using failover:(tcp://broker1.foo.bar.com:7250,tcp://broker2.foo.bar.com:7250) as the connect string.

      We couldn't figure out why until we enabled debug logging:

      [DEBUG] [2015-10-29T11:37:15,063] [ActiveMQ Task-4] Attempting  0th  connect to: tcp://broker1:7250  [FailoverTransport]
      [DEBUG] [2015-10-29T11:37:15,068] [ActiveMQ Task-4] Connect fail to: tcp://broker1:7250, reason: java.net.UnknownHostException: broker1  [FailoverTransport]
      

      (off topic: why is there only debug logging on failing attempts when there is info logging on successful attempts?)

      Since the brokers are on foo.bar.com, and the producer is on bar.com, a hostname-only lookup fails.

      Our workaround is to add foo.bar.com to the DNS search domain on producer.bar.com. (Either in /etc/resolv.conf or as a LOCALDOMAIN environment variable)

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            • Assignee:
              Unassigned
              Reporter:
              monti Henrik
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              • Created:
                Updated: