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https://issues.apache.org/jira/browse/TS-2019?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13917277#comment-13917277
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Alan M. Carroll commented on TS-2019:
-------------------------------------
fbana provided a machine that was able to reproduce this problem. As a result I
tracked this down to the UrlPrintHack logic in HTTP.cc. What happens is
m_ptr_host can be set to point in to the MIME data if the host isn't in the
URL. When this is marshalled, m_ptr_host is checked against the URL heap and
the marshal fails because it is not in there (it's in the MIME heap). As a
result of that, the marshal for the request header returns -1 instead of a
length. This isn't checked so instead of a fail the buffer pointer is backed up
one byte and the is response header written over the request header. As a
result when this unmarshalling is attempted on this mess it doesn't work and
you get the error message. I am pondering how to deal with this, as there are
good reasons for moving the m_ptr_host value, but perhaps we've done enough
work to change the host request to go through the header object and not the URL
that we can drop that.
> find out what is the problem of reporting OpenReadHead failed on vector
> inconsistency
> -------------------------------------------------------------------------------------
>
> Key: TS-2019
> URL: https://issues.apache.org/jira/browse/TS-2019
> Project: Traffic Server
> Issue Type: Task
> Components: Cache
> Reporter: Zhao Yongming
> Assignee: Alan M. Carroll
> Priority: Critical
> Fix For: 5.0.0
>
>
> {code}
> [Jul 10 19:40:33.170] Server {0x2aaaaaaf1680} NOTE: OpenReadHead failed for
> cachekey 44B5C68B : vector inconsistency with 4624
> [Jul 10 19:40:33.293] Server {0x2aaaaaaf1680} NOTE: OpenReadHead failed for
> cachekey 2ABA746F : vector inconsistency with 4632
> [Jul 10 19:40:33.368] Server {0x2aaaaaaf1680} NOTE: OpenReadHead failed for
> cachekey 389594A0 : vector inconsistency with 4632
> [Jul 10 19:40:33.399] Server {0x2aaaaaaf1680} NOTE: OpenReadHead failed for
> cachekey FBC601A3 : vector inconsistency with 4632
> [Jul 10 19:40:33.506] Server {0x2aaaaaaf1680} NOTE: OpenReadHead failed for
> cachekey 1F39AD5F : vector inconsistency with 4632
> [Jul 10 19:40:33.602] Server {0x2aaaaaaf1680} NOTE: OpenReadHead failed for
> cachekey ABFC6D97 : vector inconsistency with 4632
> [Jul 10 19:40:33.687] Server {0x2aaaaaaf1680} NOTE: OpenReadHead failed for
> cachekey 2420ABBF : vector inconsistency with 4632
> [Jul 10 19:40:33.753] Server {0x2aaaaaaf1680} NOTE: OpenReadHead failed for
> cachekey 5DD061C8 : vector inconsistency with 4632
> {code}
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