vikaskr22 opened a new pull request, #6803:
URL: https://github.com/apache/hadoop/pull/6803
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### Description of PR
AbstractDelegationTokenSecretManager's method all synchronized and are
blocking each other, even multiple readers threads are blocking each other.
This PR is an efforts towards optimising the synchronization contexts.
For detailed description, please go through the discussion on
https://issues.apache.org/jira/browse/HADOOP-18851
### How was this patch tested?
Build is working fine. And this is more about a logical change like where to
acquire or release a lock. It requires careful review. There is not any
functional logic change.
### For code changes:
- [ Y] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [N ] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [ ] If adding new dependencies to the code, are these dependencies
licensed in a way that is compatible for inclusion under [ASF
2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
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