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Posted to dev@qpid.apache.org by "Andrew Stitcher (Jira)" <ji...@apache.org> on 2021/11/19 16:07:00 UTC
[jira] [Assigned] (PROTON-2466) raw connection posts wake events after disconnect event is handled
[ https://issues.apache.org/jira/browse/PROTON-2466?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andrew Stitcher reassigned PROTON-2466:
---------------------------------------
Assignee: Clifford Jansen
> raw connection posts wake events after disconnect event is handled
> ------------------------------------------------------------------
>
> Key: PROTON-2466
> URL: https://issues.apache.org/jira/browse/PROTON-2466
> Project: Qpid Proton
> Issue Type: Bug
> Components: proton-c
> Affects Versions: proton-c-0.36.0
> Reporter: Ken Giusti
> Assignee: Clifford Jansen
> Priority: Major
> Attachments: qdrouterd-A.conf, qdrouterd-B.conf
>
>
> While running tcp stress tests against qdrouterd a crash occurred. The crash was due to a stale pointer dereference.
> qdrouterd code has been patched to properly clear the pointer and check for null in the effected codepath. However...
> ... the access occurred while processing a PN_RAW_CONNECTION_WAKE event that arrived on a raw connection *after* a PN_RAW_CONNECTION_DISCONNECTED event previously arrived on the raw connection.
> IIUC the PN_RAW_CONNECTION_DISCONNECTED event is supposed to be the last event generated on a raw connection, and once that event has been handled the raw connection is released. If that is correct then the arrival of the following WAKE event is a bug.
> Here is the log output from the router just prior to the crash (filtered on the affected connection):
> $ tail C140.txt
> 2021-11-16 17:11:10.925728 -0500 TCP_ADAPTOR (debug) [C140] PN_RAW_CONNECTION_WAKE connector
> 2021-11-16 17:11:10.926990 -0500 TCP_ADAPTOR (debug) [C140] PN_RAW_CONNECTION_WAKE connector
> 2021-11-16 17:11:10.927001 -0500 TCP_ADAPTOR (debug) [C140] PN_RAW_CONNECTION_READ connector Event
> 2021-11-16 17:11:10.927034 -0500 TCP_ADAPTOR (debug) [C140] PN_RAW_CONNECTION_READ Read 0 bytes. Total read 0 bytes
> 2021-11-16 17:11:10.927596 -0500 TCP_ADAPTOR (debug) [C140] PN_RAW_CONNECTION_WRITTEN connector pn_raw_connection_take_written_buffers wrote 3276\
> 8 bytes. Total written 36929573 bytes
> 2021-11-16 17:11:10.928207 -0500 TCP_ADAPTOR (debug) [C140][L322] PN_RAW_CONNECTION_CLOSED_READ connector
> 2021-11-16 17:11:10.928591 -0500 TCP_ADAPTOR (debug) [C140] PN_RAW_CONNECTION_CLOSED_WRITE connector
> 2021-11-16 17:11:10.929160 -0500 TCP_ADAPTOR (debug) [C140] PN_RAW_CONNECTION_WRITTEN connector pn_raw_connection_take_written_buffers wrote 3276\
> 8 bytes. Total written 36962341 bytes
> *2021-11-16 17:11:10.929410 -0500 TCP_ADAPTOR (info) [C140] PN_RAW_CONNECTION_DISCONNECTED connector*
> *2021-11-16 17:11:10.929915 -0500 TCP_ADAPTOR (debug) [C140] PN_RAW_CONNECTION_WAKE connector*
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