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https://issues.apache.org/jira/browse/HBASE-21041?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16589815#comment-16589815
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Hudson commented on HBASE-21041:
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Results for branch branch-2
[build #1148 on
builds.a.o|https://builds.apache.org/job/HBase%20Nightly/job/branch-2/1148/]:
(x) *{color:red}-1 overall{color}*
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details (if available):
(/) {color:green}+1 general checks{color}
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report|https://builds.apache.org/job/HBase%20Nightly/job/branch-2/1148//General_Nightly_Build_Report/]
(x) {color:red}-1 jdk8 hadoop2 checks{color}
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(x) {color:red}-1 jdk8 hadoop3 checks{color}
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> Memstore's heap size will be decreased to minus zero after flush
> ----------------------------------------------------------------
>
> Key: HBASE-21041
> URL: https://issues.apache.org/jira/browse/HBASE-21041
> Project: HBase
> Issue Type: Bug
> Affects Versions: 2.1.0, 2.0.1
> Reporter: Allan Yang
> Assignee: Allan Yang
> Priority: Major
> Fix For: 3.0.0, 2.1.1, 2.0.2
>
> Attachments: HBASE-21041.branch-2.0.001.patch,
> HBASE-21041.branch-2.0.002.patch
>
>
> When creating an active mutable segment (MutableSegment) in memstore,
> MutableSegment's deep overheap (208 bytes) was added to its heap size, but
> not to the region's memstore's heap size. And so was the immutable
> segment(CSLMImmutableSegment) which the mutable segment turned into
> (additional 8 bytes ) later. So after one flush, the memstore's heapsize will
> be decreased to -216 bytes, The minus number will accumulate after every
> flush.
> CompactingMemstore has this problem too.
> We need to record the overhead for CSLMImmutableSegment and MutableSegment to
> the corresponding region's memstore size.
> For CellArrayImmutableSegment, CellChunkImmutableSegment and
> CompositeImmutableSegment , it is not necessary to do so, because inside
> CompactingMemstore, the overheads are already be taken care of when transfer
> a CSLMImmutableSegment into them.
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