The class `GzipRandomAccess` is used to parse heap dump file generated from `jcmd`/`jmap` tools when testing. It has the limitation that only gzip file which has "blocksize" header field could be sucessfully parsed. We think this class can be removed for 2 reasons: 1. The gzip heap dump file generated by `jhsdb` command does not contain the "blocksize" header field, so the GzipRandomAccess can not parse the generated file successfully. 2. The `GzipInputStream` could be used instead and then gziped heap dump file generated from both `jcmd`/`jmap` and `jhsdb jmap` could be parsed using same logic. Options
------------- Commit messages: - 8273929: Remove GzipRandomAccess in heap dump test Changes: https://git.openjdk.java.net/jdk/pull/5556/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5556&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8273929 Stats: 605 lines in 2 files changed: 20 ins; 578 del; 7 mod Patch: https://git.openjdk.java.net/jdk/pull/5556.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/5556/head:pull/5556 PR: https://git.openjdk.java.net/jdk/pull/5556
