MaxGekk commented on pull request #29976:
URL: https://github.com/apache/spark/pull/29976#issuecomment-705780596
@dongjoon-hyun Can this be merged to `branch-3.0` (maybe 2.4 too) since it
can be considered as a bug fix?
Here is a real use case, a customer tries to read files in Azure Data Lake:
```
def hadoopConf1() = Map[String, String](
s"fs.adl.oauth2.access.token.provider.type" -> "ClientCredential",
s"fs.adl.oauth2.client.id" -> dbutils.secrets.get(scope = "...", key =
"..."),
s"fs.adl.oauth2.credential" -> dbutils.secrets.get(scope = "...", key =
"..."),
s"fs.adl.oauth2.refresh.url" ->
s"https://login.microsoftonline.com/.../oauth2/token";)
val df =
spark.read.format("...").options(hadoopConf1).load("adl://....azuredatalakestore.net/foldersp1/...")
```
but gets the following exception because the settings above are not
propagated to the filesystem:
```
java.lang.IllegalArgumentException: No value for
fs.adl.oauth2.access.token.provider found in conf file.
at ....adl.AdlFileSystem.getNonEmptyVal(AdlFileSystem.java:820)
at
....adl.AdlFileSystem.getCustomAccessTokenProvider(AdlFileSystem.java:220)
at ....adl.AdlFileSystem.getAccessTokenProvider(AdlFileSystem.java:257)
at ....adl.AdlFileSystem.initialize(AdlFileSystem.java:164)
at
org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2669)
```
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