Thrown when an error is detected in an ack/nack/modack call, when exactly-once delivery is enabled on the subscription. This will only be thrown for actual errors that can't be retried.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[],[],null,["# Class AckError (4.8.0)\n\nVersion latestkeyboard_arrow_down\n\n- [4.8.0 (latest)](/nodejs/docs/reference/pubsub/latest/pubsub/ackerror)\n- [4.4.0](/nodejs/docs/reference/pubsub/4.4.0/pubsub/ackerror)\n- [4.3.3](/nodejs/docs/reference/pubsub/4.3.3/pubsub/ackerror)\n- [4.1.1](/nodejs/docs/reference/pubsub/4.1.1/pubsub/ackerror)\n- [4.0.7](/nodejs/docs/reference/pubsub/4.0.7/pubsub/ackerror)\n- [3.7.5](/nodejs/docs/reference/pubsub/3.7.5/pubsub/ackerror)\n- [3.2.1](/nodejs/docs/reference/pubsub/3.2.1/pubsub/ackerror)\n- [3.1.1](/nodejs/docs/reference/pubsub/3.1.1/pubsub/ackerror)\n- [3.0.3](/nodejs/docs/reference/pubsub/3.0.3/pubsub/ackerror)\n- [2.18.3](/nodejs/docs/reference/pubsub/2.18.3/pubsub/ackerror)\n- [2.17.0](/nodejs/docs/reference/pubsub/2.17.0/pubsub/ackerror)\n- [2.16.6](/nodejs/docs/reference/pubsub/2.16.6/pubsub/ackerror)\n- [2.13.0](/nodejs/docs/reference/pubsub/2.13.0/pubsub/ackerror) \nThrown when an error is detected in an ack/nack/modack call, when exactly-once delivery is enabled on the subscription. This will only be thrown for actual errors that can't be retried. \n\nInheritance\n-----------\n\nError \\\u003e AckError\n\nPackage\n-------\n\n[@google-cloud/pubsub](../overview.html)\n\nConstructors\n------------\n\n### (constructor)(errorCode, message)\n\n constructor(errorCode: AckResponse, message?: string);\n\nConstructs a new instance of the `AckError` class\n\nProperties\n----------\n\n### errorCode\n\n errorCode: AckResponse;"]]
