dongjoon-hyun commented on code in PR #57285:
URL: https://github.com/apache/spark/pull/57285#discussion_r3678301415
##########
core/src/main/scala/org/apache/spark/deploy/security/HadoopDelegationTokenManager.scala:
##########
@@ -76,28 +77,52 @@ private[spark] class HadoopDelegationTokenManager(
require((principal == null) == (keytab == null),
"Both principal and keytab must be defined, or neither.")
+ if (sparkConf.get(DIRECT_CREDENTIAL_PROVIDERS_ENABLED)) {
+ val hasEncryption = sparkConf.getBoolean("spark.ssl.rpc.enabled", false) ||
+ (sparkConf.get(NETWORK_AUTH_ENABLED) &&
+ (sparkConf.get(NETWORK_CRYPTO_ENABLED) ||
sparkConf.get(SASL_ENCRYPTION_ENABLED)))
+ require(hasEncryption,
+ "RPC channel encryption must be enabled when " +
+ "spark.security.directCredentialProviders.enabled is true: either " +
+ "spark.ssl.rpc.enabled=true, or spark.authenticate=true together with " +
+ "spark.network.crypto.enabled or
spark.authenticate.enableSaslEncryption. " +
+ "Credential tokens must not be transmitted over unencrypted channels.")
+ }
+
private val delegationTokenProviders = loadProviders()
+ if (sparkConf.get(DIRECT_CREDENTIAL_PROVIDERS_ENABLED) &&
delegationTokenProviders.isEmpty) {
+ logWarning("spark.security.directCredentialProviders.enabled is true but "
+
+ "no HadoopDelegationTokenProvider implementations were discovered. " +
+ "Ensure provider JARs are on the classpath with META-INF/services
registration.")
+ }
logDebug("Using the following builtin delegation token providers: " +
s"${delegationTokenProviders.keys.mkString(", ")}.")
private var renewalExecutor: ScheduledExecutorService = _
+ private def hasKerberosCredentials: Boolean =
+ sparkConf.get(KERBEROS_RENEWAL_CREDENTIALS) match {
+ case "keytab" => principal != null
+ case "ccache" =>
UserGroupInformation.getCurrentUser().hasKerberosCredentials()
+ case _ => false
+ }
+
/** @return Whether delegation token renewal is enabled. */
- def renewalEnabled: Boolean = sparkConf.get(KERBEROS_RENEWAL_CREDENTIALS)
match {
- case "keytab" => principal != null
- case "ccache" =>
UserGroupInformation.getCurrentUser().hasKerberosCredentials()
- case _ => false
+ def renewalEnabled: Boolean = {
+ hasKerberosCredentials ||
+ (sparkConf.get(DIRECT_CREDENTIAL_PROVIDERS_ENABLED) &&
delegationTokenProviders.nonEmpty)
Review Comment:
Technically, `delegationTokenProviders.nonEmpty` is insufficient. The
following is the correct way to check the existence of tokens, isn't it? WDYT,
@parthchandra ?
```suggestion
hasKerberosCredentials ||
(sparkConf.get(DIRECT_CREDENTIAL_PROVIDERS_ENABLED) &&
delegationTokenProviders.values.exists(_.delegationTokensRequired(sparkConf,
hadoopConf)))
```
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