Fix Hive build on Hudson
------------------------
Key: HIVE-1168
URL: https://issues.apache.org/jira/browse/HIVE-1168
Project: Hadoop Hive
Issue Type: Bug
Components: Build Infrastructure
Reporter: Carl Steinbach
Assignee: John Sichi
Priority: Critical
{quote}
We need to delete the .ant directory containing the old ivy version in order to
fix it
(and if we're using the same environment for both trunk and branches, either
segregate them or script an rm to clean in between).
{quote}
It's worth noting that ant may have picked up the old version of Ivy from
somewhere else. In order Ant's classpath contains:
# Ant's startup JAR file, ant-launcher.jar
# Everything in the directory containing the version of ant-launcher.jar that's
running, i.e. everything in ANT_HOME/lib
# All JAR files in ${user.home}/.ant/lib
# Directories and JAR files supplied via the -lib command line option.
# Everything in the CLASSPATH variable unless the -noclasspath option is used.
(2) implies that users on shared machines may have to install their own
version of ant in order to get around these problems, assuming that the
administrator has install the ivy.jar in $ANT_HOME/lib
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