Chris Drome created HIVE-3632:
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             Summary: datanucleus breaks when using JDK7
                 Key: HIVE-3632
                 URL: https://issues.apache.org/jira/browse/HIVE-3632
             Project: Hive
          Issue Type: Bug
          Components: Metastore
    Affects Versions: 0.10.0, 0.9.1
            Reporter: Chris Drome
            Priority: Critical


I found serious problems with datanucleus code when using JDK7, resulting in 
some sort of exception being thrown when datanucleus code is entered.

I tried source=1.7, target=1.7 with JDK7 as well as source=1.6, target=1.6 with 
JDK7 and there was no visible difference in that the same unit tests failed.

I tried upgrading datanucleus to 3.0.1, as per HIVE-2084.patch, which did not 
fix the failing tests.

I tried upgrading datanucleus to 3.1-release, as per the advise of 
http://www.datanucleus.org/servlet/jira/browse/NUCENHANCER-86, which suggests 
using ASMv4 will allow datanucleus to work with JDK7. I was not successful with 
this either.

I tried upgrading datanucleus to 3.1.2. I was not successful with this either.

Regarding datanucleus support for JDK7+, there is the following JIRA

http://www.datanucleus.org/servlet/jira/browse/NUCENHANCER-81

which suggests that they don't plan to actively support JDK7+ bytecode any time 
soon.

I also tested the following JVM parameters found on

http://veerasundar.com/blog/2012/01/java-lang-verifyerror-expecting-a-stackmap-frame-at-branch-target-jdk-7/

with no success either.

This will become a more serious problem as people move to newer JVMs. If there 
are other who have solved this issue, please post how this was done. Otherwise, 
it is a topic that I would like to raise for discussion.

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