Kimahriman opened a new pull request, #8000:
URL: https://github.com/apache/hadoop/pull/8000
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### Description of PR
Update the process of JournalNodes journaling new edits to persist edits to
disk before adding them to the edit cache. This prevents standby and observer
nodes from accidentally reading transactions from the edit cache when tailing
logs that have not actually been durably persisted, making the standby or
observer have in invalid state thinking the latest committed transaction is
higher than it should be.
### How was this patch tested?
New UT using a new fault injector method to simulate a disk write failure.
### For code changes:
- [x] Does the title or this PR starts with the corresponding JIRA issue id
(e.g. 'HADOOP-17799. Your PR title ...')?
- [x] Object storage: have the integration tests been executed and the
endpoint declared according to the connector-specific documentation?
- [x] 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)?
- [x] If applicable, have you updated the `LICENSE`, `LICENSE-binary`,
`NOTICE-binary` files?
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