Github user sesuncedu commented on the issue:
https://github.com/apache/commons-compress/pull/43
Oracle JDK 7 has been dead for two years. Openjdk 7 has some back ports of
security patches, but both are gone from most Linux distros.
Openjdk and oraclejdk 8 are essentially in sync, with the only differences
really being the oracle proprietary stuff. There's not much win testing against
both unless the oracle commercial stuff is being used.
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