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https://issues.apache.org/jira/browse/CASSANDRA-2380?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Jonathan Ellis resolved CASSANDRA-2380.
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Resolution: Cannot Reproduce
> Cassandra requires hostname is resolvable even when specifying IP's for
> listen and rpc addresses
> ------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-2380
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2380
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 0.7.4
> Environment: open jdk 1.6.0_20 64-Bit
> Reporter: Eric Tamme
> Priority: Trivial
>
> A strange looking error is printed out, with no stack trace and no other log,
> when hostname is not resolvable regardless of whether or not the hostname is
> being used to specify a listen or rpc address. I am specifically using IPv6
> addresses but I have tested it with IPv4 and gotten the same result.
> Error: Exception thrown by the agent : java.net.MalformedURLException: Local
> host name unknown: java.net.UnknownHostException
> I have spent several hours trying to track down what is happening and have
> been unable to determine if this is down in the java
> getByName->getAllByName->getAllByName0 set of methods that is happening when
> listenAddress = InetAddress.getByName(conf.listen_address);
> is called from DatabaseDescriptor.java
> I am not able to replicate the error in a stand alone java program (see
> below) so I am not sure what cassandra is doing to force name resolution.
> Perhaps the issue is not in DatabaseDescriptor, but some where else? I get
> no log output, and no stack trace when this happens, only the single line
> error.
> import java.net.InetAddress;
> import java.net.UnknownHostException;
> class Test
> {
> public static void main(String args[])
> {
> try
> {
> InetAddress listenAddress = InetAddress.getByName("foo");
> System.out.println(listenAddress);
> }
> catch (UnknownHostException e)
> {
> System.out.println("Unable to parse address");
> }
> }
> }
> People have just said "oh go put a line in your hosts file" and while that
> does work, it is not right. If I am not using my hostname for any reason
> cassandra should not have to resolve it, and carrying around that application
> specific stuff in your hosts file is not correct.
> Regardless of if this bug gets fixed, I want to better understand what the
> heck is going on that makes cassandra crash and print out that exception.
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