[
https://issues.apache.org/jira/browse/BEAM-7195?focusedWorklogId=492652&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-492652
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ASF GitHub Bot logged work on BEAM-7195:
----------------------------------------
Author: ASF GitHub Bot
Created on: 29/Sep/20 20:17
Start Date: 29/Sep/20 20:17
Worklog Time Spent: 10m
Work Description: guangstick opened a new pull request #12968:
URL: https://github.com/apache/beam/pull/12968
In WriteTables and WriteRename, the `createDisposition` is set to
`CREATE_NEVER` when the pane index is great than 0.
https://github.com/apache/beam/blob/ecedd3e654352f1b51ab2caae0fd4665403bd0eb/sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/WriteTables.java#L205-L210
https://github.com/apache/beam/blob/ecedd3e654352f1b51ab2caae0fd4665403bd0eb/sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/WriteRename.java#L145-L148
Before actually triggering BQ load, BatchLoads groups all temporary files by
a singleton key.
https://github.com/apache/beam/blob/ecedd3e654352f1b51ab2caae0fd4665403bd0eb/sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/BatchLoads.java#L308-L313
This can be problematic when using
[DynamicDestinations](https://github.com/apache/beam/blob/ecedd3e654352f1b51ab2caae0fd4665403bd0eb/sdks/java/io/google-cloud-platform/src/main/java/org/apache/beam/sdk/io/gcp/bigquery/DynamicDestinations.java)
in a streaming pipeline with triggers. Sometimes users would like to create
tables in the middle of the pipeline based on the data or time. Because of the
`GroupOntoSingleton`, different BQ destinations are grouped under the same key
(always `Void`), therefore the pane index is always incremental and new tables
won't be created even though users have specified `CreateDisposition =
CREATE_IF_NEEDED`
Proposed Solution: Instead of grouping into a singleton, grouping by
Bigquery destinations.
------------------------
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Issue Time Tracking
-------------------
Worklog Id: (was: 492652)
Remaining Estimate: 0h
Time Spent: 10m
> BigQuery - 404 errors for 'table not found' when using dynamic destinations -
> sometimes, new table fails to get created
> -----------------------------------------------------------------------------------------------------------------------
>
> Key: BEAM-7195
> URL: https://issues.apache.org/jira/browse/BEAM-7195
> Project: Beam
> Issue Type: Bug
> Components: io-java-gcp
> Affects Versions: 2.5.0
> Environment: Windows
> Reporter: Chris
> Assignee: Guangyu Chen
> Priority: P1
> Time Spent: 10m
> Remaining Estimate: 0h
>
> See the following StackOverflow question, which describes the details:
>
> [https://stackoverflow.com/questions/55932291/apache-beam-for-google-cloud-dataflow-404-errors-when-using-bigqueryio-write-c]
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