Looks like this might have actually fixed the root cause:
https://review.openstack.org/#/c/71363/
Because the trends for the shelving error are correlating with this:
http://logstash.openstack.org/#eyJzZWFyY2giOiJtZXNzYWdlOlwiRXJyb3IgZnJvbSBsaWJ2aXJ0IGR1cmluZyB1bmZpbHRlci4gQ29kZT01NSBFcnJvcj1SZXF1ZXN0ZWQgb3BlcmF0aW9uIGlzIG5vdCB2YWxpZDogbndmaWx0ZXIgaXMgaW4gdXNlXCIgQU5EIGZpbGVuYW1lOlwibG9ncy9zY3JlZW4tbi1jcHUudHh0XCIiLCJmaWVsZHMiOltdLCJvZmZzZXQiOjAsInRpbWVmcmFtZSI6ImFsbCIsImdyYXBobW9kZSI6ImNvdW50IiwidGltZSI6eyJ1c2VyX2ludGVydmFsIjowfSwic3RhbXAiOjEzOTE2MjM5MzE5MDN9
And they both showed up around the same time and are dropping out of logstash around the same time, after the above patch was merged.
Looks like this might have actually fixed the root cause:
https:/ /review. openstack. org/#/c/ 71363/
Because the trends for the shelving error are correlating with this:
http:// logstash. openstack. org/#eyJzZWFyY2 giOiJtZXNzYWdlO lwiRXJyb3IgZnJv bSBsaWJ2aXJ0IGR 1cmluZyB1bmZpbH Rlci4gQ29kZT01N SBFcnJvcj1SZXF1 ZXN0ZWQgb3BlcmF 0aW9uIGlzIG5vdC B2YWxpZDogbndma Wx0ZXIgaXMgaW4g dXNlXCIgQU5EIGZ pbGVuYW1lOlwibG 9ncy9zY3JlZW4tb i1jcHUudHh0XCIi LCJmaWVsZHMiOlt dLCJvZmZzZXQiOj AsInRpbWVmcmFtZ SI6ImFsbCIsImdy YXBobW9kZSI6ImN vdW50IiwidGltZS I6eyJ1c2VyX2lud GVydmFsIjowfSwi c3RhbXAiOjEzOTE 2MjM5MzE5MDN9
And they both showed up around the same time and are dropping out of logstash around the same time, after the above patch was merged.