Rushabh S Shah created HDFS-11702:
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Summary: Remove indefinite caching of key provider uri in DFSClient
Key: HDFS-11702
URL: https://issues.apache.org/jira/browse/HDFS-11702
Project: Hadoop HDFS
Issue Type: Bug
Components: hdfs-client
Reporter: Rushabh S Shah
Assignee: Rushabh S Shah
There is an indefinite caching of key provider uri in dfsclient.
Relevant piece of code.
{code:title=DFSClient.java|borderStyle=solid}
/**
* The key provider uri is searched in the following order.
* 1. If there is a mapping in Credential's secrets map for namenode uri.
* 2. From namenode getServerDefaults rpc.
* 3. Finally fallback to local conf.
* @return keyProviderUri if found from either of above 3 cases,
* null otherwise
* @throws IOException
*/
URI getKeyProviderUri() throws IOException {
if (keyProviderUri != null) {
return keyProviderUri;
}
{code}
Once the key provider uri is set, it won't refresh the value even if the key
provider uri on namenode is changed.
For long running clients like on oozie servers, this means we have to bounce
all the oozie servers to get the change reflected.
After this change, the client will cache the value for an hour after which it
will issue getServerDefaults call and will refresh the key provider uri.
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