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https://issues.apache.org/jira/browse/GEODE-10035?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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John Blum updated GEODE-10035:
------------------------------
Issue Type: Bug (was: Improvement)
> The System property condition to use "direct" ByteBuffers in P2P is wrong
> -------------------------------------------------------------------------
>
> Key: GEODE-10035
> URL: https://issues.apache.org/jira/browse/GEODE-10035
> Project: Geode
> Issue Type: Bug
> Affects Versions: 1.14.3
> Reporter: John Blum
> Priority: Major
>
> In the {{o.a.g.internal.net.ByteBuffer.useDirectBuffers}} class member
> (static) constant field
> ([source|https://github.com/apache/geode/blob/rel/v1.14.3/geode-core/src/main/java/org/apache/geode/internal/net/BufferPool.java#L82-L83]),
> which is derived from either the "{{p2p.nodirectBuffers"}} OR the
> "{{gemfire.BufferPool.useHeapBuffers}}" System properties, the conditional
> logic is incorrect!
> It should read (formatted to make it more readable):
> {code:java}
> public static final boolean useDirectBuffers = !(
> Boolean.getBoolean("p2p.nodirectBuffers")
> ||
> Boolean.getBoolean(GeodeGlossary.GEMFIRE_PREFIX+"BufferPool.useHeapBuffers")
> );
> {code}
> Alternatively:
> {code:java}
> public static final boolean useDirectBuffers =
> !Boolean.getBoolean("p2p.nodirectBuffers")
> &&
> !Boolean.getBoolean(GeodeGlossary.GEMFIRE_PREFIX+"BufferPool.useHeapBuffers");
> {code}
> That is, if either the "{{p2p.nodirectBuffers}}" OR the
> "{{gemfire.BufferPool.useHeapBuffers}}" System properties are {{true}}, then
> DO NOT USE direct ByteBuffers.
> The term "{{useHeapBuffers}}" implies that the buffer should be created on
> the JVM Heap, and not in main memory as a "direct" ByteBuffer.
> Setting the System property "{{gemfire.BufferPool.useHeapBuffers}}" to
> "{{true}}" would result in a direct ByteBuffer allocation as can be seen
> [here|https://github.com/apache/geode/blob/rel/v1.14.3/geode-core/src/main/java/org/apache/geode/internal/net/BufferPool.java#L104-L115],
>
> rather than what should happen
> [here|https://github.com/apache/geode/blob/rel/v1.14.3/geode-core/src/main/java/org/apache/geode/internal/net/BufferPool.java#L117].
> As the condition currently stands, if the "{{p2p.nodirectBuffers}}" System
> property is not set at all (which results in {{Boolean.getBoolean(..)}}
> returning {{false}}), which negated results in the OR'd condition not even
> being evaluated!
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