UDP Discovery fails to report correct IP address to peers for back-connect when
InetAddress.getLocalHost() fails to return an externally-visible address (i.e.
returns a local address)
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Key: JCS-89
URL: https://issues.apache.org/jira/browse/JCS-89
Project: Commons JCS
Issue Type: Bug
Reporter: Diego Rivera
On certain environments where reverse-lookup of the machine's IP address isn't
available, or other IP configurations restrict the ability of the JVM to
determine its own "canonical" local address, it's impossible to determine ahead
of time what address should be sent into the UDP multicast in order for lateral
peers to establish the back-connection.
The fix for this is simple: when the packet is received with the discovery
message, determine the source host address of the packet that was received and
set that to the discovery message's host property
(setHost(packet.getAddress().getHostAddress()). This way, it's 100% for
certain we'll be back-connecting to the correct instance.
A patch will be uploaded shortly.
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