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https://issues.apache.org/jira/browse/TS-1332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13406261#comment-13406261
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James Peach commented on TS-1332:
---------------------------------
IIRC this is harmless. As you point out, it will happen when the certificate's
subject also appears in the SNI host name list. I'll take this bug you
double-check and drop the log level of the message.
> "ERROR: Cannot insert duplicate!" when SSL cert has same domain in CN and SAN
> -----------------------------------------------------------------------------
>
> Key: TS-1332
> URL: https://issues.apache.org/jira/browse/TS-1332
> Project: Traffic Server
> Issue Type: Bug
> Components: SSL
> Affects Versions: 3.2.0
> Environment: ATS 3.2.0 RHEL 6.2 64-bit
> Reporter: David Carlin
> Priority: Minor
>
> I see the following error when starting ATS:
> [Jul 3 22:09:23.878] Server {0x2b2f97c6b860} ERROR: Cannot insert duplicate!
> bcall helped me figure out what the problem is by looking through the source;
> apparently this error message occurs when the SSL certificate is loaded. Its
> caused because the same domain appears in the CN and the SAN of the cert.
> There was a relevant discussion between jpeach/bcall/zwoop on #traffic-server
> June 15th ~3PM PST if you guys keep IRC logs. Lots of further
> troubleshooting in there.
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