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https://issues.apache.org/jira/browse/HTRACE-209?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14642172#comment-14642172
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Masatake Iwasaki commented on HTRACE-209:
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bq. There isn't really any way to make this change compatibly, since there are
tons of places in the code that assume that span ID is 64 bits.
I meant source compatibility for tracee such as Hadoop and HBase. Tracee just
need to send a pair of long value along with RPC and don't care about spanId
itself. This requirement will not change by the fix. Anyway I am fine to clean
up API on major version up. Let's describe required tracee code update in
documentation.
> Make span ID 128 bit to avoid collisions
> ----------------------------------------
>
> Key: HTRACE-209
> URL: https://issues.apache.org/jira/browse/HTRACE-209
> Project: HTrace
> Issue Type: Sub-task
> Affects Versions: 4.0
> Reporter: Colin Patrick McCabe
> Assignee: Colin Patrick McCabe
> Attachments: HTRACE-209.001.patch, HTRACE-209.002.patch,
> HTRACE-209.004.patch
>
>
> Make span ID 128 bit to avoid collisions in htrace 4.x
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