singhpk234 commented on code in PR #2341:
URL: https://github.com/apache/polaris/pull/2341#discussion_r2299364540


##########
polaris-core/src/main/java/org/apache/polaris/core/storage/PolarisCredentialVendor.java:
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@@ -37,6 +38,10 @@ public interface PolarisCredentialVendor {
    *     allowedWriteLocations
    * @param allowedReadLocations a set of allowed to read locations
    * @param allowedWriteLocations a set of allowed to write locations
+   * @param refreshCredentialsEndpoint an optional endpoint to use for 
refreshing credentials. If
+   *     supported by the storage type it will be returned to the client in 
the appropriate
+   *     properties. The endpoint may be relative to the base URI and the 
client is responsible for

Review Comment:
   Oh no this made a lot of things super tricky, i checked iceberg python for 
refresh keyword but i didn't any prs for that so i am assuming that it doesn't 
support, taking only the iceberg java sdk reference 
   if we always send relative url it only works for >= 1.8
   fails for < 1.8 
   I know there is a header that the java sdk sends which has SDK version 
`X-Client-Version` header we may want to salvage this now on when to return the 
absolute vs relative, 
https://github.com/apache/iceberg/blob/main/core/src/main/java/org/apache/iceberg/rest/HTTPClient.java#L77
   
   Its a bit surprising to me, but i think for now we can park this by just 
documenting this gotcha, WDYT @dimas-b ?



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