liangyu-1 commented on PR #42295:
URL: https://github.com/apache/spark/pull/42295#issuecomment-1667554705
The main cause is that ShutdownHook thread is created before we create the
ugi in ApplicationMaster.
When we set the config key _"hadoop.security.credential.provider.path"_, the
ApplicationMaster will try to get a filesystem when generating SSLOptions, and
when initialize the filesystem during which it will generate a new thread whose
ugi is inherited from the current process (yarn).
After this, it will generate a new ugi (SPARK_USER) in ApplicationMaster and
execute the doAs() function.
Here is the chain of the call:
ApplicationMaster.<init>(ApplicationMaster.scala:83) ->
org.apache.spark.SecurityManager.<init>(SecurityManager.scala:98) ->
org.apache.spark.SSLOptions$.parse(SSLOptions.scala:188) ->
org.apache.hadoop.conf.Configuration.getPassword(Configuration.java:2353) ->
org.apache.hadoop.conf.Configuration.getPasswordFromCredentialProviders(Configuration.java:2434)
->
org.apache.hadoop.security.alias.CredentialProviderFactory.getProviders(CredentialProviderFactory.java:82)
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