Resolution:
Environment:
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AIX

Resolution:
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BW uses JDK APIs to determine hostname. So it depends on the order specified by JVM (IBM JVM) and OS System (AIX) to resolve the hostname.

Currently, as per IBM documentation:
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By default, resolver routines first attempt to resolve names through the DNS/BIND, then NIS and the /etc/hosts file. The /etc/netsvc.conf file may specify a different search order. The environment variable NSORDER overrides both the /etc/netsvc.conf file and the default ordering. Services are ordered as hosts = value, value, value in the /etc/netsvc.conf file where at least one value must be specified from the list bind, nis, local. NSORDER specifies a list of values.
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References:
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http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp?topic=/com.ibm.aix.commtechref/doc/commtrf2/gethostbyname.htm

What order does BW follow in order to resolve DNS names on AIX machines?