[jira] [Created] (HDFS-16925) Fix regex pattern for namenode audit log tests

["Viraj Jasani (Jira)" <ji...@apache.org>]

Viraj Jasani created HDFS-16925:
-----------------------------------

             Summary: Fix regex pattern for namenode audit log tests
                 Key: HDFS-16925
                 URL: https://issues.apache.org/jira/browse/HDFS-16925
             Project: Hadoop HDFS
          Issue Type: Task
            Reporter: Viraj Jasani
            Assignee: Viraj Jasani


With HADOOP-18628 in place, we perform InetAddress#getHostName in addition to InetAddress#getHostAddress, to save host name with IPC Connection object. When we perform InetAddress#getHostName, toString() of InetAddress would automatically print \{hostName}/\{hostIPAddress} if hostname is already resolved:
{code:java}
/**
 * Converts this IP address to a {@code String}. The
 * string returned is of the form: hostname / literal IP
 * address.
 *
 * If the host name is unresolved, no reverse name service lookup
 * is performed. The hostname part will be represented by an empty string.
 *
 * @return  a string representation of this IP address.
 */
public String toString() {
    String hostName = holder().getHostName();
    return ((hostName != null) ? hostName : "")
        + "/" + getHostAddress();
}{code}
 

For namenode audit logs, this means that when dfs client makes filesystem updates, the audit logs would also print host name in the audit logs in addition to ip address. We have some tests that performs regex pattern matching to identify the log pattern of audit logs, we will have to change them to reflect the change in host address.



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