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ASF subversion and git services commented on DISPATCH-1136: ----------------------------------------------------------- Commit 430efa0777c87289f5b59a83d0d36cab7647adac in qpid-dispatch's branch refs/heads/master from [~chug] [ https://git-wip-us.apache.org/repos/asf?p=qpid-dispatch.git;h=430efa0 ] DISPATCH-1136: Don't drop presettled message at head of list This message may have had bytes go over the wire already and dropping it now may corrupt the link data stream. > Receiver crash due to data corruption on multicast presettled messages > ---------------------------------------------------------------------- > > Key: DISPATCH-1136 > URL: https://issues.apache.org/jira/browse/DISPATCH-1136 > Project: Qpid Dispatch > Issue Type: Bug > Components: Routing Engine > Affects Versions: 1.3.0 > Environment: Fedora 27 > Three routers connected serially as described in DISPATCH-1124 > > Reporter: Chuck Rolke > Assignee: Chuck Rolke > Priority: Major > > After applying the fixes from DISPATCH-1124 and DISPATCH-1129 receivers in > long-running multicast presettled tests still fail with corrupted data > sequences. There is no single symptom but several: > * Receivers use all system memory and cache and getting hit by the OOM killer > * underrun > * illegal value for field > Research shows that function qdr_forward_drop_presettled_CT_LH is routinely > dropping presettled deliveries that have already made forward progress in > transmitting bytes to the wire. After that happens there is a race condition > as to whether the message is successfully transmitted or the message is torn > down in the middle of transmission. > For reproducing this error the sender must supply messages significantly > faster than the receiving router can forward them to the next router. This > triggers the presettled drops. My test setup does this by having the sender > and the receiving router on the same laptop and having the next router > connected over a relatively slow WiFi. > -- This message was sent by Atlassian JIRA (v7.6.3#76005) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@qpid.apache.org For additional commands, e-mail: dev-h...@qpid.apache.org