Dave Thompson created HADOOP-8327:
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Summary: distcpv2 and distcpv1 jars should not coexist
Key: HADOOP-8327
URL: https://issues.apache.org/jira/browse/HADOOP-8327
Project: Hadoop Common
Issue Type: Bug
Affects Versions: 0.23.2
Reporter: Dave Thompson
Assignee: Dave Thompson
Distcp v2 (hadoop-tools/hadoop-distcp/...) and Distcp v1
(hadoop-tools/hadoop-extras/...) are currently both built, and the resulting
hadoop-distcp-*.jar and hadoop-extras-*.jar end up in the same class path
directory. This causes some undeterministic problems, where v1 is launched
when v2 is intended, or even v2 is launched, but may later fail on various
nodes because of mismatch with v1.
According to
http://docs.oracle.com/javase/6/docs/technotes/tools/windows/classpath.html
("Understanding class path wildcards")
"The order in which the JAR files in a directory are enumerated in the expanded
class path is not specified and may vary from platform to platform and even
from moment to moment on the same machine."
Suggest distcpv1 be depricated at this point, possibly by discontinuing build
of distcpv1.
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