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https://issues.apache.org/jira/browse/HBASE-18389?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16089503#comment-16089503
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Xiang Li commented on HBASE-18389:
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Had a discussion with Anoop:
{quote}
Ya. As we pass the length also.. May be a mistake at that time.
This param just makes it sure this is the size of an array java object.
May be if u remove the param, have to better name the API. Maybe
sizeOfArray(int len)?
{quote}
It came to a conclusion that we open a JIRA and have it be open for everyone to
comment.
> Remove byte[] from sizeOf() of ClassSize, ClassSize.MemoryLayout and
> ClassSize.UnsafeLayout
> -------------------------------------------------------------------------------------------
>
> Key: HBASE-18389
> URL: https://issues.apache.org/jira/browse/HBASE-18389
> Project: HBase
> Issue Type: Bug
> Components: util
> Reporter: Xiang Li
> Assignee: Xiang Li
> Priority: Minor
>
> In ClassSize class and its internal static class, sizeOf() function has 2
> formal parameters: byte[] b and int len. But the function's internal logic
> does not use or refer to byte[] b. Could be removed.
> {code:title=hbase-common/src/main/java/org/apache/hadoop/hbase/util/ClassSize.java|borderStyle=solid}
> // Class of ClassSize
> public static long sizeOf(byte[] b, int len) {
> return memoryLayout.sizeOf(b, len);
> }
> // Class of ClassSize.MemoryLayout
> long sizeOf(byte[] b, int len) {
> return align(arrayHeaderSize() + len);
> }
> // Class of ClassSize.UnsafeLayout
> long sizeOf(byte[] b, int len) {
> return align(arrayHeaderSize() + len *
> UnsafeAccess.theUnsafe.ARRAY_BYTE_INDEX_SCALE);
> }
> {code}
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