DEADLINE_EXCEEDED cloud runtime_error ai_generated true

DEADLINE_EXCEEDED: The deadline expired before the operation could complete. gRPC stream closed with status code 4

ID: cloud/gcp-pubsub-subscription-pull-ack-deadline-exceeded

Also available as: JSON · Markdown · 中文
82%Fix Rate
85%Confidence
1Evidence
2024-02-15First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
gcloud_cli active — — —
pubsub_api active — — —
client_library active — — —

Root Cause

Pub/Sub subscriber's ack deadline is too short for message processing, causing the gRPC streaming pull to close after repeated deadline violations.

generic

中文

Pub/Sub 订阅者的确认截止时间太短，无法完成消息处理，导致 gRPC 流式拉取在多次截止时间违规后关闭。

Official Documentation

https://cloud.google.com/pubsub/docs/pull#streamingpull

Workarounds

  1. 90% success Increase the ack deadline for the subscription: `gcloud pubsub subscriptions update my-sub --ack-deadline=600` (10 minutes). Ensure your message processing completes within this window. 
    Increase the ack deadline for the subscription: `gcloud pubsub subscriptions update my-sub --ack-deadline=600` (10 minutes). Ensure your message processing completes within this window.
  2. 95% success Implement a manual ack extension loop in your subscriber: after receiving a message, call `subscriber.modifyAckDeadline(message, 60)` every 30 seconds until processing is done, then ack. Example: `from google.cloud import pubsub_v1; subscriber.modify_ack_deadline(subscription, [message.ack_id], 60)` 
    Implement a manual ack extension loop in your subscriber: after receiving a message, call `subscriber.modifyAckDeadline(message, 60)` every 30 seconds until processing is done, then ack. Example: `from google.cloud import pubsub_v1; subscriber.modify_ack_deadline(subscription, [message.ack_id], 60)`

中文步骤

  1. Increase the ack deadline for the subscription: `gcloud pubsub subscriptions update my-sub --ack-deadline=600` (10 minutes). Ensure your message processing completes within this window.
  2. Implement a manual ack extension loop in your subscriber: after receiving a message, call `subscriber.modifyAckDeadline(message, 60)` every 30 seconds until processing is done, then ack. Example: `from google.cloud import pubsub_v1; subscriber.modify_ack_deadline(subscription, [message.ack_id], 60)`

Dead Ends

Common approaches that don't work:

  1. 75% fail

    Adding more subscribers doesn't fix the ack deadline; each message still has the same processing time limit.

  2. 60% fail

    Synchronous pull has its own timeout issues and doesn't inherently increase ack deadline.