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However oslo.messaging as a client lib\nis not prepared in case operators decide to setup this limit.\n\nThis patch implement the logic to detect when the exchange\nlimit is reached when a publisher try to declare a new\nexchange.\n\nIf this situation is detected then an ``ExchangeLimitReached``\nexception is raised to allow upper layers to implement\na retry strategy.\n\n[1] https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.1.4\n[2] https://github.com/rabbitmq/rabbitmq-server/pull/14339/files\n\nChange-Id: I586c02ede5f999f9658d569969c9306be3592a01\nSigned-off-by: Hervé Beraud \u003chberaud@redhat.com\u003e\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/oslo.messaging/commit/3bc41510c37bbbdf3ef407dafa0357e784e63f60"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/oslo.messaging/commit/3bc41510c37bbbdf3ef407dafa0357e784e63f60"}]},"branch":"refs/heads/master"},"153e2967c5ffc60305c4566023e1d525ac40573d":{"kind":"REWORK","_number":7,"created":"2025-11-14 10:38:32.000000000","uploader":{"_account_id":28522,"name":"Hervé Beraud","email":"herveberaud.pro@gmail.com","username":"hberaud"},"ref":"refs/changes/77/960377/7","fetch":{"anonymous http":{"url":"https://review.opendev.org/openstack/oslo.messaging","ref":"refs/changes/77/960377/7","commands":{"Checkout":"git fetch https://review.opendev.org/openstack/oslo.messaging refs/changes/77/960377/7 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch https://review.opendev.org/openstack/oslo.messaging refs/changes/77/960377/7 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch https://review.opendev.org/openstack/oslo.messaging refs/changes/77/960377/7 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull https://review.opendev.org/openstack/oslo.messaging refs/changes/77/960377/7"}}},"commit":{"parents":[{"commit":"56921bcf7f08ad29c19ae8767c694099f0d83450","subject":"Update master for stable/2025.2","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/oslo.messaging/commit/56921bcf7f08ad29c19ae8767c694099f0d83450"}]}],"author":{"name":"Hervé Beraud","email":"hberaud@redhat.com","date":"2025-09-10 13:27:15.000000000","tz":120},"committer":{"name":"Hervé Beraud","email":"hberaud@redhat.com","date":"2025-11-14 10:37:20.000000000","tz":60},"subject":"Implement cluster exchange limit detection logic.","message":"Implement cluster exchange limit detection logic.\n\nSince version 4.1.4 RabbitMQ allow to configure a limit [1][2]\non the cluster-wide number of exchanges that applications.\n\nThis new RabbitMQ feature is a guard against applications\nthat leak resources. However oslo.messaging as a client lib\nis not prepared in case operators decide to setup this limit.\n\nThis patch implement the logic to detect when the exchange\nlimit is reached when a publisher try to declare a new\nexchange.\n\nIf this situation is detected then an ``ExchangeLimitReached``\nexception is raised to allow upper layers to implement\na retry strategy.\n\nUpper layer could implement an optional retry mechanism with\na configurable failure rate, applying a threshold-based\nfailure-aware decision pattern to enable smarter,\nadaptive handling. A kind of upper layer opt-in logic that\ncould allow to choose between best effort mode vs fail fast modes.\n\n[1] https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.1.4\n[2] https://github.com/rabbitmq/rabbitmq-server/pull/14339/files\n\nChange-Id: I586c02ede5f999f9658d569969c9306be3592a01\nSigned-off-by: Hervé Beraud \u003chberaud@redhat.com\u003e\n","web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/oslo.messaging/commit/153e2967c5ffc60305c4566023e1d525ac40573d"}],"resolve_conflicts_web_links":[{"name":"gitea","tooltip":"Open in GitWeb","url":"https://opendev.org/openstack/oslo.messaging/commit/153e2967c5ffc60305c4566023e1d525ac40573d"}]},"branch":"refs/heads/master"}},"requirements":[],"submit_records":[],"submit_requirements":[{"name":"Verified","description":"Verified in gate by CI","status":"UNSATISFIED","is_legacy":false,"submittability_expression_result":{"expression":"label:Verified\u003dMAX AND -label:Verified\u003dMIN","fulfilled":false,"status":"FAIL","passing_atoms":[],"failing_atoms":["label:Verified\u003dMAX","label:Verified\u003dMIN"],"atom_explanations":{}}},{"name":"Backport-Candidate","description":"Backport candidate status","status":"NOT_APPLICABLE","is_legacy":false,"applicability_expression_result":{"fulfilled":false,"status":"FAIL"},"submittability_expression_result":{"expression":"is:true","fulfilled":true,"status":"NOT_EVALUATED","passing_atoms":[],"failing_atoms":[],"atom_explanations":{}}},{"name":"Code-Review","description":"Code reviewed by core reviewer","status":"UNSATISFIED","is_legacy":false,"submittability_expression_result":{"expression":"label:Code-Review\u003dMAX AND -label:Code-Review\u003dMIN","fulfilled":false,"status":"FAIL","passing_atoms":[],"failing_atoms":["label:Code-Review\u003dMAX","label:Code-Review\u003dMIN"],"atom_explanations":{}}},{"name":"Workflow","description":"Approved for gate by core reviewer","status":"UNSATISFIED","is_legacy":false,"submittability_expression_result":{"expression":"label:Workflow\u003dMAX AND -label:Workflow\u003dMIN","fulfilled":false,"status":"FAIL","passing_atoms":[],"failing_atoms":["label:Workflow\u003dMAX","label:Workflow\u003dMIN"],"atom_explanations":{}}}]}