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https://issues.apache.org/jira/browse/TS-4902?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Leif Hedstrom updated TS-4902:
------------------------------
Priority: Blocker (was: Major)
> Http2ConnectionState::stream_list gets in bad state
> ---------------------------------------------------
>
> Key: TS-4902
> URL: https://issues.apache.org/jira/browse/TS-4902
> Project: Traffic Server
> Issue Type: Bug
> Components: HTTP/2
> Reporter: Susan Hinrichs
> Priority: Blocker
> Fix For: 7.1.0
>
>
> Saw this in one of my runs while debugging TS-4900 and TS-4813. It might
> have been due to my attempted fix, but I don't think so.
> I left current master running in production for an hour. When I returned,
> CPU utilization had jumped from 70% to 400%. perf top showed that the
> majority of time was being spent in Http2ConnectionState::restart_streams.
> Connected with debugger and two threads were spinning in that method. In
> each case this->stream_list.head->link.next ==
> this->stream_list.head->link.prev and this->thread_list.head->link.next !=
> NULL.
> I assume that was are missing some locking and the stream_list is being
> manipulated by two threads in parallel.
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