Ilan Filonenko created SPARK-25681:
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Summary: Delegation Tokens fetched twice upon
HadoopFSDelegationTokenProvider creation
Key: SPARK-25681
URL: https://issues.apache.org/jira/browse/SPARK-25681
Project: Spark
Issue Type: Improvement
Components: Kubernetes, Mesos, YARN
Affects Versions: 2.5.0
Reporter: Ilan Filonenko
Looking for a refactor to {{HadoopFSDelegationTokenProvider.}} Within the
function {{obtainDelegationTokens()}}:
This code-block:
{code:java}
val fetchCreds = fetchDelegationTokens(getTokenRenewer(hadoopConf),...)
// Get the token renewal interval if it is not set. It will only be called
once.
if (tokenRenewalInterval == null) {
tokenRenewalInterval = getTokenRenewalInterval(...)
}{code}
calls {{fetchDelegationTokens()}} twice since the {{tokenRenewalInterval}}
will always be null upon creation of the {{TokenManager}} which I think is
unnecessary in the case of Kubernetes (as you are creating 2 DTs when only one
is needed.) Could this possibly be refactored to only call
{{fetchDelegationTokens()}} once upon startup or to have a param to specify
{{tokenRenewalInterval}}
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