Trond Norbye added a comment - 09/Oct/19 10:40 PM - edited The difference in kv_engine between the two builds is: commit 510acc65d2ef846204f123a3feab64545233a616 Author: Trond Norbye <trond.norbye@gmail.com> Date: Mon Sep 30 10:47:35 2019 +0200   Prepare Command Contexts for OoO [2/n] When operating in OoO mode the underlying buffer for the request may change the first time the command returns EWOULDBLOCK as we'll try not to copy the buffer if we don't need our own copy. This means that we can't keep pointers into the packet as members in the command context (but fetch them from the cookie every time). Change-Id: Ice6b62a17609ffc119aa10d6016c980b8a301c2f Reviewed-on: http://review.couchbase.org/115567 Tested-by: Trond Norbye <trond.norbye@couchbase.com> Reviewed-by: Dave Rigby <daver@couchbase.com> Tested-by: Build Bot <build@couchbase.com>   commit 8cdb2cee3a4c9b599f58b2f0a615d7d7810bac3f Author: Dave Rigby <daver@couchbase.com> Date: Thu Sep 26 10:14:53 2019 +0100   Update uses of AtomicDuration to new template platform's cb::AtomicDuration is now templated on the memory ordering to use. Update the uses of AtomicDuration to use the correct template syntax. Change-Id: I00221d1acbea73f12a00d679e595f91739d998c0 Reviewed-on: http://review.couchbase.org/115416 Tested-by: Build Bot <build@couchbase.com> Reviewed-by: Trond Norbye <trond.norbye@couchbase.com> and in platform: commit f42ec1e99c185d1c242cb64bc8a38c1837fa9822 Author: Dave Rigby <daver@couchbase.com> Date: Thu Sep 26 09:57:36 2019 +0100   Allow memory order of AtomicDuration to be specified Change AtomicDuration to a templated class, templated on the memory order to use. Defaults to the same memory order it previously used (relaxed). Change-Id: I00221d1acbea73f12a00d679e595f91739d998c0 Reviewed-on: http://review.couchbase.org/115575 Tested-by: Build Bot <build@couchbase.com> Reviewed-by: Ben Huddleston <ben.huddleston@couchbase.com> Reviewed-by: Trond Norbye <trond.norbye@couchbase.com>

Trond Norbye added a comment - 10/Oct/19 12:12 PM Reverted the patch

Couchbase Build Team added a comment - 10/Oct/19 12:46 PM Build couchbase-server-6.5.0-4554 contains kv_engine commit c154703 with commit message: MB-36413 : Revert "Prepare Command Contexts for OoO [2/n] "

Couchbase Build Team added a comment - 11/Oct/19 4:06 AM Build couchbase-server-7.0.0-1009 contains kv_engine commit c154703 with commit message: MB-36413 : Revert "Prepare Command Contexts for OoO [2/n] "

Wayne Siu added a comment - 24/Oct/19 1:06 AM Verified with build 6.5.0-4558, the issue is fixed.