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https://issues.apache.org/jira/browse/DISPATCH-1927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17278098#comment-17278098
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ASF GitHub Bot commented on DISPATCH-1927:
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ted-ross closed pull request #1014:
URL: https://github.com/apache/qpid-dispatch/pull/1014
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> TCP adaptor Assertion `(link->undelivered).head' failed.
> --------------------------------------------------------
>
> Key: DISPATCH-1927
> URL: https://issues.apache.org/jira/browse/DISPATCH-1927
> Project: Qpid Dispatch
> Issue Type: Bug
> Components: Protocol Adaptors, Router Node
> Environment: Fedora 31
> Reporter: Charles E. Rolke
> Assignee: Ted Ross
> Priority: Major
> Attachments: DISPATCH-1927-use-after-free-log.txt
>
>
> Test setup:
> * Proton git: branch master @ 5e7d7af8f
> * Dispatch git: branch master @ ec39e5e
> * Debug build
> * Running the configuration described in DISPATCH-1777
> Seven clients run TCP_echo_client continuously against the server:
> * Four run --size 0
> * One runs --size 100
> * One runs --size 100000
> * One runs --size 1000000
> Eventually the router running the tcpConnector fails with the assertion.
> Tail of the router log:
> {code:java}
> Two router setup with a TCP listener on one router and a TCP connector on the
> other router.
> This is the log from the second tcpConnector router
> Here comes a message from core to TCP needing a new connection to egress
> server
> 2021-01-22 09:37:57.979054 -0500 TCP_ADAPTOR (debug) [C1] on_activate
> 2021-01-22 09:37:57.979594 -0500 TCP_ADAPTOR (debug) [C1][L1] qdr_tcp_push
> 2021-01-22 09:37:57.979619 -0500 TCP_ADAPTOR (debug) [C1][L1][D46793]
> qdr_tcp_deliver Delivery event
> 2021-01-22 09:37:57.979641 -0500 TCP_ADAPTOR (debug) [C1][L1][D46793]
> tcp_adaptor initiating egress connection
> 2021-01-22 09:37:57.979671 -0500 TCP_ADAPTOR (info) [C11768] Connecting to:
> 127.0.0.1:9090
> 2021-01-22 09:37:57.979789 -0500 TCP_ADAPTOR (debug) [C11767]
> qdr_tcp_activate: waking raw connection
> 2021-01-22 09:37:57.979974 -0500 TCP_ADAPTOR (info) [C11768]
> PN_RAW_CONNECTION_CONNECTED Egress connected to 127.0.0.1:9090
> 2021-01-22 09:37:57.980003 -0500 TCP_ADAPTOR (info) [C11768] Opening
> server-side core connection 127.0.0.1:9090
> 2021-01-22 09:37:57.980057 -0500 ROUTER_CORE (info) [C11768] Connection
> Opened: dir=out host=127.0.0.1:9090 vhost= encrypted=no auth=no user=
> container_id=TcpAdaptor props=
> Delivery is handed off to new connection/link
> 2021-01-22 09:37:57.980153 -0500 TCP_ADAPTOR (debug) [C1][L1][D46793]
> initial_delivery ownership passed to [C11768][L23564][D46793]
> 2021-01-22 09:37:57.980191 -0500 TCP_ADAPTOR (debug) [C11768]
> PN_RAW_CONNECTION_NEED_WRITE_BUFFERS
> 2021-01-22 09:37:57.980215 -0500 TCP_ADAPTOR (debug) [C11768]
> PN_RAW_CONNECTION_NEED_READ_BUFFERS
> 2021-01-22 09:37:57.980243 -0500 TCP_ADAPTOR (debug) [C11768][L23564] Waiting
> for credit to initiate message
> POOF! link_process_delivery has no deliveries yet.
> This is happening too soon. Probably.
> qdrouterd: /home/chug/git/qpid-dispatch/src/router_core/transfer.c:231:
> qdr_link_process_deliveries: Assertion `(link->undelivered).head' failed.
> from gdb: delivery_id = 46793, link_id = 23564, conn_id = 11768 or:
> [C11768][L23564][D46793] for failed process
> Moments later the rest of the connection/link setup happens
> 2021-01-22 09:37:57.980312 -0500 ROUTER_CORE (info) [C11768][L23564] Link
> attached: dir=out source={foo expire:link} target={<none> expire:link}
> 2021-01-22 09:37:57.980332 -0500 TCP_ADAPTOR (debug) [C11768]
> qdr_tcp_activate: waking raw connection
> 2021-01-22 09:37:57.980356 -0500 TCP_ADAPTOR (debug) [C11767]
> qdr_tcp_activate: waking raw connection
> 2021-01-22 09:37:57.980386 -0500 TCP_ADAPTOR (debug) [C11768]
> PN_RAW_CONNECTION_WAKE
> 2021-01-22 09:37:57.980404 -0500 TCP_ADAPTOR (debug) [C11768][L23564]
> qdr_tcp_second_attach
> 2021-01-22 09:37:57.980430 -0500 TCP_ADAPTOR (debug) [C11768][L23564]
> qdr_tcp_get_credit: NOOP
> 2021-01-22 09:37:57.980453 -0500 TCP_ADAPTOR (debug) [C11768][L23564]
> qdr_tcp_push
> 2021-01-22 09:37:57.980471 -0500 TCP_ADAPTOR (debug) [C11768][L23564][D46793]
> qdr_tcp_deliver Delivery event
> 2021-01-22 09:37:57.980563 -0500 TCP_ADAPTOR (debug) [C11768][L23565] Create
> Link to amqp:/_topo/0/router-b/temp.tsMXbvjL9M01_l8
> 2021-01-22 09:37:57.980591 -0500 TCP_ADAPTOR (debug) [C11768][L23564] Waiting
> for credit to initiate message
> 2021-01-22 09:37:57.980621 -0500 TCP_ADAPTOR (debug) [C11768] Writing 2040
> bytes
> 2021-01-22 09:37:57.980640 -0500 TCP_ADAPTOR (debug) [C11768] Writing 2048
> bytes
> 2021-01-22 09:37:57.980657 -0500 TCP_ADAPTOR (debug) [C11768] Writing 2048
> bytes
> 2021-01-22 09:37:57.980674 -0500 TCP_ADAPTOR (debug) [C11768] Writing 1104
> bytes
> 2021-01-22 09:37:57.980691 -0500 TCP_ADAPTOR (debug) [C11768][L23564]
> qdr_tcp_get_credit: NOOP
> Aborted (core dumped){code}
>
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