IZ77432: UNKNOWNHOSTEXCEPTION IN GETLOCALHOST()

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You can track all active APARs for this component.

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 number

    IZ77432

  • Reported component name

    JAVA 5 CLASS LI

  • Reported component ID

    620500130

  • Reported release

    500

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-06-16

  • Closed date

    2010-06-25

  • Last modified date

    2010-07-22

  • 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

       UP



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Document information


More support for:

Runtimes for Java Technology
Java Class Libraries

Software version:

5.0

Reference #:

IZ77432

Modified date:

2010-07-22

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