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https://issues.apache.org/jira/browse/GEODE-9466?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Darrel Schneider updated GEODE-9466:
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Summary: ByteBufferInputStream slower on Java 16 and later (was:
ByteBufferInputStream slower on Java 9 and later)
> ByteBufferInputStream slower on Java 16 and later
> -------------------------------------------------
>
> Key: GEODE-9466
> URL: https://issues.apache.org/jira/browse/GEODE-9466
> Project: Geode
> Issue Type: Improvement
> Components: core
> Reporter: Darrel Schneider
> Priority: Major
> Labels: Java16
>
> ByteBufferInputStream has a method determineUnaligned that will always return
> false on java 9 and later. This is because it calls Method.setAccessible
> which is not allowed under normal conditions starting with java 9 (see:
> [https://stackoverflow.com/questions/41265266/how-to-solve-inaccessibleobjectexception-unable-to-make-member-accessible-m).|https://stackoverflow.com/questions/41265266/how-to-solve-inaccessibleobjectexception-unable-to-make-member-accessible-m]
> This causes ByteBufferInputStream to do a bunch of its work a byte at a time
> instead of using the optimal multi-byte methods like readShort, readInt, and
> readLong.
> It would be simple to change determineUnaligned in its exception catch block
> to read the "os.arch" system property and if it is any of the following to
> return true:
> {code:java}
> arch.equals("i386") || arch.equals("x86")
> || arch.equals("amd64") || arch.equals("x86_64")
> || arch.equals("ppc64") || arch.equals("ppc64le")
> {code}
> This is what the Bits class does in jdk 8. In jdk 16 it this logic has moved
> to UnsafeConstants and its value is injected by the JVM so it is unclear if
> the list has grown.
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