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{{% product-name %}} does the following when you send a write request:
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1. Validates the request.
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2. If successful, attempts to [ingest data](/influxdb3/cloud-dedicated/reference/internals/durability/#data-ingest) from the request body; otherwise, responds with an [error status](#review-http-status-codes).
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3. Ingests or rejects data in the batch and returns one of the following HTTP status codes:
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-`204 No Content`: All data in the batch is ingested.
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-`400 Bad Request`: Some (_when **partial writes** are configured for the cluster_) or all of the data has been rejected. Data that has not been rejected is ingested and queryable.
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The response body contains error details about [rejected points](#troubleshoot-rejected-points), up to 100 points.
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Writes are synchronous--the response status indicates the final status of the write and all ingested data is queryable.
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To ensure that InfluxDB handles writes in the order you request them,
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wait for the response before you send the next request.
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### Review HTTP status codes
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InfluxDB uses conventional HTTP status codes to indicate the success or failure of a request.
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The `message` property of the response body may contain additional details about the error.
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{{< product-name >}} returns one the following HTTP status codes for a write request:
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| HTTP response code | Response body | Description |
|`204 No Content"`| no response body | If InfluxDB ingested all of the data in the batch |
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|`400 "Bad request"`| error details about rejected points, up to 100 points: `line` contains the first rejected line, `message` describes rejections | If some (_when **partial writes** are configured for the cluster_) or all request data isn't allowed (for example, if it is malformed or falls outside of the bucket's retention period)--the response body indicates whether a partial write has occurred or if all data has been rejected |
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|`401 "Unauthorized"`|| If the `Authorization` header is missing or malformed or if the [token](/influxdb3/cloud-dedicated/admin/tokens/) doesn't have [permission](/influxdb3/cloud-dedicated/reference/cli/influxctl/token/create/#examples) to write to the database. See [examples using credentials](/influxdb3/cloud-dedicated/get-started/write/#write-line-protocol-to-influxdb) in write requests. |
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|`404 "Not found"`| requested **resource type** (for example, "organization" or "database"), and **resource name**| If a requested resource (for example, organization or database) wasn't found |
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| `422 "Unprocessable Entity"` | `message` contains details about the error | If the data isn't allowed (for example, falls outside of the database’s retention period).
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|`500 "Internal server error"`|| Default status for an error |
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| `503 "Service unavailable"` | | If the server is temporarily unavailable to accept writes. The `Retry-After` header contains the number of seconds to wait before trying the write again.
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The `message` property of the response body may contain additional details about the error.
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If your data did not write to the database, see how to [troubleshoot rejected points](#troubleshoot-rejected-points).
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## Troubleshoot failures
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If you notice data is missing in your database, do the following:
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- Check the [HTTP status code](#review-http-status-codes) in the response.
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- Check the `message` property in the response body for details about the error.
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- If the `message` describes a field error, [troubleshoot rejected points](#troubleshoot-rejected-points).
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- Verify all lines contain valid syntax ([line protocol](/influxdb3/cloud-dedicated/reference/syntax/line-protocol/)).
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- Verify the timestamps in your data match the [precision parameter](/influxdb3/cloud-dedicated/reference/glossary/#precision) in your request.
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- Minimize payload size and network errors by [optimizing writes](/influxdb3/cloud-dedicated/write-data/best-practices/optimize-writes/).
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## Troubleshoot rejected points
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When writing points from a batch, InfluxDB rejects points that have syntax errors or schema conflicts.
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If InfluxDB processes the data in your batch and then rejects points, the [HTTP response](#handle-write-responses) body contains the following properties that describe rejected points:
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-`code`: `"invalid"`
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-`line`: the line number of the _first_ rejected point in the batch.
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-`message`: a string that contains line-separated error messages, one message for each rejected point in the batch, up to 100 rejected points.
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InfluxDB rejects points for the following reasons:
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- a line protocol parsing error
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- an invalid timestamp
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- a schema conflict
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Schema conflicts occur when you try to write data that contains any of the following:
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- a wrong data type: the point falls within the same partition (default partitioning is measurement and day) as existing bucket data and contains a different data type for an existing field
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- a tag and a field that use the same key
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### Example
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The following example shows a response body for a write request that contains two rejected points:
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```json
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{
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"code": "invalid",
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"line": 2,
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"message": "failed to parse line protocol:
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errors encountered on line(s):
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error parsing line 2 (1-based): Invalid measurement was provided
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error parsing line 4 (1-based): Unable to parse timestamp value '123461000000000000000000000000'"
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}
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```
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Check for [field data type](/influxdb3/cloud-dedicated/reference/syntax/line-protocol/#data-types-and-format) differences between the rejected data point and points within the same database and partition--for example, did you attempt to write `string` data to an `int` field?
{{% product-name %}} does the following when you send a write request:
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1. Validates the request.
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2. If successful, attempts to [ingest data](/influxdb3/cloud-serverless/reference/internals/durability/#data-ingest) from the request body; otherwise, responds with an [error status](#review-http-status-codes).
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3. Ingests or rejects data from the batch and returns one of the following HTTP status codes:
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-`204 No Content`: All of the data is ingested and queryable.
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-`400 Bad Request`: Some or all of the data has been rejected. Data that has not been rejected is ingested and queryable.
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The response body contains error details about [rejected points](#troubleshoot-rejected-points), up to 100 points.
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Writes are synchronous--the response status indicates the final status of the write and all ingested data is queryable.
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To ensure that InfluxDB handles writes in the order you request them,
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wait for the response before you send the next request.
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-
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### Review HTTP status codes
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-
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-
InfluxDB uses conventional HTTP status codes to indicate the success or failure of a request.
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The `message` property of the response body may contain additional details about the error.
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{{< product-name >}} returns one the following HTTP status codes for a write request:
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| HTTP response code | Response body | Description |
|`204 "No Content"`| no response body | If InfluxDB ingested all of the data in the batch |
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|`400 "Bad request"`| error details about rejected points, up to 100 points: `line` contains the first rejected line, `message` describes rejections | If some or all request data isn't allowed (for example, is malformed or falls outside of the bucket's retention period)--the response body indicates whether a partial write has occurred or if all data has been rejected |
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|`401 "Unauthorized"`|| If the `Authorization` header is missing or malformed or if the [token](/influxdb3/cloud-serverless/admin/tokens/) doesn't have [permission](/influxdb3/cloud-serverless/admin/tokens/create-token/) to write to the bucket. See [examples using credentials](/influxdb3/cloud-serverless/get-started/write/#write-line-protocol-to-influxdb) in write requests. |
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|`404 "Not found"`| requested **resource type** (for example, "organization" or "bucket"), and **resource name**| If a requested resource (for example, organization or bucket) wasn't found |
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|`413 “Request too large”`| cannot read data: points in batch is too large | If a request exceeds the maximum [global limit](/influxdb3/cloud-serverless/admin/billing/limits/)|
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| `429 “Too many requests”` | | If the number of requests exceeds the [adjustable service quota](/influxdb3/cloud-serverless/admin/billing/limits/#adjustable-service-quotas). The `Retry-After` header contains the number of seconds to wait before trying the write again. | If a request exceeds your plan's [adjustable service quotas](/influxdb3/cloud-serverless/admin/billing/limits/#adjustable-service-quotas)
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|`500 "Internal server error"`|| Default status for an error |
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| `503 "Service unavailable"` | | If the server is temporarily unavailable to accept writes. The `Retry-After` header contains the number of seconds to wait before trying the write again.
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The `message` property of the response body may contain additional details about the error.
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If your data did not write to the bucket, see how to [troubleshoot rejected points](#troubleshoot-rejected-points).
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## Troubleshoot failures
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If you notice data is missing in your database, do the following:
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- Check the [HTTP status code](#review-http-status-codes) in the response.
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- Check the `message` property in the response body for details about the error.
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- If the `message` describes a field error, [troubleshoot rejected points](#troubleshoot-rejected-points).
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- Verify all lines contain valid syntax ([line protocol](/influxdb3/cloud-serverless/reference/syntax/line-protocol/)).
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- Verify the timestamps in your data match the [precision parameter](/influxdb3/cloud-serverless/reference/glossary/#precision) in your request.
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- Minimize payload size and network errors by [optimizing writes](/influxdb3/cloud-serverless/write-data/best-practices/optimize-writes/).
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## Troubleshoot rejected points
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When writing points from a batch, InfluxDB rejects points that have syntax errors or schema conflicts.
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If InfluxDB processes the data in your batch and then rejects points, the [HTTP response](#handle-write-responses) body contains the following properties that describe rejected points:
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-`code`: `"invalid"`
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-`line`: the line number of the _first_ rejected point in the batch.
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-`message`: a string that contains line-separated error messages, one message for each rejected point in the batch, up to 100 rejected points.
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InfluxDB rejects points for the following reasons:
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- a line protocol parsing error
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- an invalid timestamp
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- a schema conflict
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Schema conflicts occur when you try to write data that contains any of the following:
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- a wrong data type: the point falls within the same partition (default partitioning is measurement and day) as existing bucket data and contains a different data type for an existing field
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- a tag and a field that use the same key
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### Example
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The following example shows a response body for a write request that contains two rejected points:
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```json
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{
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"code": "invalid",
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"line": 2,
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"message": "failed to parse line protocol:
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errors encountered on line(s):
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error parsing line 2 (1-based): Invalid measurement was provided
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error parsing line 4 (1-based): Unable to parse timestamp value '123461000000000000000000000000'"
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}
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```
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Check for [field data type](/influxdb3/cloud-serverless/reference/syntax/line-protocol/#data-types-and-format) differences between the rejected data point and points within the same database and partition--for example, did you attempt to write `string` data to an `int` field?
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