Madhan Neethiraj created RANGER-3989:
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Summary: 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
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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