jesumyip opened a new issue, #13009:
URL: https://github.com/apache/iceberg/issues/13009
### Query engine
Bytewax
### Question
I'm trying to figure this out. Using v1.9 of the released Iceberg Connector
under Docker compose. I've set
```
"iceberg.catalog.type": "rest",
"iceberg.catalog.uri": "xxxxx",
"iceberg.catalog.warehouse": "s3://xxxxx",
"iceberg.catalog.io-impl": "org.apache.iceberg.aws.s3.S3FileIO",
"iceberg.catalog.credential": "oauth",
"iceberg.catalog.oauth.client-id": "${SNOWFLAKE_CLIENT_ID}",
"iceberg.catalog.oauth.client-secret": "${SNOWFLAKE_CLIENT_SECRET}",
"iceberg.catalog.oauth.scope": "session:role:ACCOUNTADMIN",
"oauth2-server-uri": "xxxx",
"rest.auth.type": "oauth2",
```
The problem is Snowflake has a OAuth2 endpoint that is different from the
one automatically generated by the Iceberg sink. The sink uses
`iceberg.catalog.uri` + `v1/oauth/tokens`. So I tried setting
`oauth2-server-uri` because I saw this in the sink's logs:
```
[2025-05-08 08:26:03,570] INFO Hadoop config initialized:
org.apache.hadoop.conf.Configuration (org.apache.iceberg.connect.CatalogUtils)
[2025-05-08 08:26:03,576] WARN Inferring rest.auth.type=oauth2 since
property credential was provided. Please explicitly set rest.auth.type to avoid
this warning. (org.apache.iceberg.rest.auth.AuthManagers)
[2025-05-08 08:26:03,576] INFO Loading AuthManager implementation:
org.apache.iceberg.rest.auth.OAuth2Manager
(org.apache.iceberg.rest.auth.AuthManagers)
[2025-05-08 08:26:03,583] WARN Iceberg REST client is missing the OAuth2
server URI configuration and defaults to
[https://xxxx/v1/oauth/tokens.](https://xxxx/v1/oauth/tokens.) This automatic
fallback will be removed in a future Iceberg release.It is recommended to
configure the OAuth2 endpoint using the 'oauth2-server-uri' property to be
prepared. This warning will disappear if the OAuth2 endpoint is explicitly
configured. See
[https://github.com/apache/iceberg/issues/10537](https://github.com/apache/iceberg/issues/10537)
(org.apache.iceberg.rest.auth.OAuth2Manager)
[2025-05-08 08:26:03,741] WARN Unable to parse error response
(org.apache.iceberg.rest.ErrorHandlers)
```
This obviously failed spectacularly and I see the raw HTML page of a 404
error displayed by Snowflake inside the sink's logs.
One more question, how do I get rid of the error `WARN Inferring
rest.auth.type=oauth2 since property credential was provided`? I have tried
setting `rest.auth.type=oauth2` but it didn't work. When I look at
https://iceberg.apache.org/docs/nightly/kafka-connect/#configuration, I can
only see configuration properties like `iceberg.catalog.*` and no details of
what goes in place of the asterisk. The `REST example` section of that URL also
doesn't help much.
Where can I find the required documentation?
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