[jira] [Updated] (TS-3743) Crash Under Heavy Load and Sending Plugin Error Page

["Sam Baskinger (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TS-3743?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sam Baskinger updated TS-3743:
------------------------------
    Attachment: stacktrace.txt

Representative stacktrace.

> Crash Under Heavy Load and Sending Plugin Error Page
> ----------------------------------------------------
>
>                 Key: TS-3743
>                 URL: https://issues.apache.org/jira/browse/TS-3743
>             Project: Traffic Server
>          Issue Type: Bug
>          Components: Core
>            Reporter: Sam Baskinger
>         Attachments: stacktrace.txt
>
>
> One of the tests done on the IronBee plugin for TrafficServer is to send a OWASP Zap scan through the proxy at a DokuWiki server. When this was done a repeatable but seemingly sporadic crash was observed when IronBee would request that a block page be delivered to the client.
> The crash was always in {{HttpTunnel::producer_run (this=this@entry=0xaf6021c8, p=p@entry=0xaf6022f8)}} and in all cases {{c->vc}} was invalid.
> Our investigations correlated the crash with HttpSM's {{ua_session->m_active}} being false. More specifically we think that {{Http::SM::setup_internal_transfer()}} starts with {{ua_session->m_active}} as true and then closes it when it reaches the call to {{tunnel.tunnel_run(p)}}.
> Please refer to two attachments. The first is a copy of the stack trace we've been working off of. Every crash has a remarkably similar call stack. The second attachment is a patch that is working in our labs.
> This also appears in the TrafficServer 4.x series, and the same patch fixes our problems.



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