IZ77432: UNKNOWNHOSTEXCEPTION IN GETLOCALHOST()

APAR status

• Closed as program error.

Error description

• Error Message: N/A
  .
  Stack Trace: java.net.UnknownHostException: localhost: localhost
  at java.net.InetAddress.getAllByName0(InetAddress.java:1249)
  at java.net.InetAddress.getAllByName(InetAddress.java:1176)
  at java.net.InetAddress.getAllByName(InetAddress.java:1099)
  at java.net.InetAddress.getByName(InetAddress.java:1049)
  at HostName.main(HostName.java:6)
  .
  

Local fix

• Use IPv4 instead of IPv6 as default. Pass
  -Djava.net.preferIPv4Stack=true as a command line parameter to
  the JVM to resolve the issue
  

Problem summary

• getByName() and getLocalHost() returns an unexpected
  java.net.UnknownHostException when /etc/services file is
  empty/corrupted in Java 5
  

Problem conclusion

• This defect will be fixed in:
  5.0.0 SR12
  .
  The unwanted services parameter "domain" in getaddrinfo() has
  been changed
  .
  To obtain the fix:
  Install build 20100625 or later
  

Temporary fix

• -Djava.net.preferIPv4Stack=true
  (Enable IPv4 by default and everything works fine)
  

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  JAVA 5 CLASS LI

• Fixed component ID

  620500130

Applicable component levels

• R500 PSN

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