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https://issues.apache.org/jira/browse/HBASE-18601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16266105#comment-16266105
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Chia-Ping Tsai commented on HBASE-18601:
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{code:title=TraceTree.java}
if (span.getParents().length == 0) {
LinkedList<Span> list = parentToSpans.get(Long.valueOf(0L)); <-- here
if (list == null) {
list = new LinkedList<Span>();
parentToSpans.put(new SpanId(Long.MIN_VALUE, Long.MIN_VALUE), list);
}
list.add(span);
}
{code}
It seems we pass the wrong type to the {{parentToSpans#get}}.
[~balazs.meszaros] Would you please take a look?
> Update Htrace to 4.2
> --------------------
>
> Key: HBASE-18601
> URL: https://issues.apache.org/jira/browse/HBASE-18601
> Project: HBase
> Issue Type: Improvement
> Components: dependencies, tracing
> Affects Versions: 2.0.0, 3.0.0
> Reporter: Tamas Penzes
> Assignee: Balazs Meszaros
> Fix For: 2.0.0-beta-1
>
> Attachments: HBASE-18601.master.001.patch,
> HBASE-18601.master.002.patch, HBASE-18601.master.003 (3).patch,
> HBASE-18601.master.003.patch, HBASE-18601.master.004.patch,
> HBASE-18601.master.004.patch, HBASE-18601.master.005.patch,
> HBASE-18601.master.006.patch, HBASE-18601.master.006.patch,
> HBASE-18601.master.007.patch, HBASE-18601.master.007.patch,
> HBASE-18601.master.007.patch, HBASE-18601.master.008.patch,
> HBASE-18601.master.009.patch, HBASE-18601.master.009.patch,
> HBASE-18601.master.010.patch, HBASE-18601.master.010.patch,
> HBASE-18601.master.011.patch, HBASE-18601.master.012.patch,
> HBASE-18601.master.013.patch, HBASE-18601.master.014.patch,
> HBASE-18601.master.014.patch, HBASE-18601.master.015.patch
>
>
> HTrace is not perfectly integrated into HBase, the version 3.2.0 is buggy,
> the upgrade to 4.x is not trivial and would take time. It might not worth to
> keep it in this state, so would be better to remove it.
> Of course it doesn't mean tracing would be useless, just that in this form
> the use of HTrace 3.2 might not add any value to the project and fixing it
> would be far too much effort.
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
> Based on the decision of the community we keep htrace now and update version
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