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Hemanth Yamijala commented on HADOOP-6800: ------------------------------------------ Tom, about the ivy.jar, it is like you said happening because in hadoop-common there are two versions of the jar in the lib folder. > Harmonize JAR library versions > ------------------------------ > > Key: HADOOP-6800 > URL: https://issues.apache.org/jira/browse/HADOOP-6800 > Project: Hadoop Common > Issue Type: Bug > Reporter: Tom White > Assignee: Tom White > Priority: Blocker > Fix For: 0.21.0 > > Attachments: build.sh, HADOOP-6800.patch, HADOOP-6800.patch, > HADOOP-6800.patch, ivy-declarations.dump.merged, jars-in-lib.dump.merged, > tar-munge > > > Currently, multiple versions of the same library JAR are being pulled in for > various reasons. > * Within the same project, multiple versions of the same JAR are pulled in. > E.g. Avro (used by Common) depends on Commons Lang 2.5 while Common depends > on Commons Lang 2.4. > * Dependent subprojects use different versions. E.g. Common depends on Avro > 1.3.2 while MapReduce depends on 1.3.0. Since MapReduce depends on Common, > this has the potential to cause a problem at runtime. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.