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https://issues.apache.org/jira/browse/RANGER-3989?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Madhan Neethiraj updated RANGER-3989:
-------------------------------------
Attachment: RANGER-3989.patch
> KMS APIs fail due to ConcurrentModificationException
> ----------------------------------------------------
>
> Key: RANGER-3989
> URL: https://issues.apache.org/jira/browse/RANGER-3989
> Project: Ranger
> Issue Type: Bug
> Components: kms
> Reporter: Madhan Neethiraj
> Assignee: Madhan Neethiraj
> Priority: Major
> Attachments: RANGER-3989.patch
>
>
> When KMS APIs are called concurrently they can fail withÂ
> ConcurrentModificationException, due to updates to a map instance while
> another thread is in the middle of iterating the map - for example:
> {noformat}
> java.util.ConcurrentModificationException: null
> at java.util.HashMap$HashIterator.nextNode(HashMap.java:1469)
> at java.util.HashMap$EntryIterator.next(HashMap.java:1503)
> at java.util.HashMap$EntryIterator.next(HashMap.java:1501)
> at
> org.apache.hadoop.crypto.key.RangerKeyStoreProvider.flush(RangerKeyStoreProvider.java:360)
> at
> org.apache.hadoop.crypto.key.KeyProviderExtension.flush(KeyProviderExtension.java:127)
> at
> org.apache.hadoop.crypto.key.KeyProviderExtension.flush(KeyProviderExtension.java:127)
> at
> org.apache.hadoop.crypto.key.KeyProviderExtension.flush(KeyProviderExtension.java:127)
> at
> org.apache.hadoop.crypto.key.kms.server.KeyAuthorizationKeyProvider.flush(KeyAuthorizationKeyProvider.java:365)
> at org.apache.hadoop.crypto.key.kms.server.KMS$1.run(KMS.java:159)
> at org.apache.hadoop.crypto.key.kms.server.KMS$1.run(KMS.java:155)
> at java.security.AccessController.doPrivileged(Native Method)
> at javax.security.auth.Subject.doAs(Subject.java:422)
> at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1845)
> at
> org.apache.hadoop.crypto.key.kms.server.KMS.createKey(KMS.java:154) {noformat}
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