ivankelly opened a new pull request #898: Bookies should prioritize recovery reads/writes URL: https://github.com/apache/bookkeeper/pull/898 The change adds a new flag for reads, RECOVERY_READ. This flag is set when a client is retrying to recover a ledger. Recovery reads should be higher priority than normal reads, as recovery usually happens when a writer has failed, and another node needs to take over the stream that that ledger belonged to. All writes on that stream are blocked until the ledger the ledger has been recovered, so giving these reads priority will mean the stream is out for action for the shortest amount of time possible. Priority is given to these reads by executing the reads directly in the BookieRequestProcessor, rather than adding them to the readThreadPool where they could end up queuing. This change was originally 372a99db in the yahoo. Descriptions of the changes in this PR: (PR description content here)... Master Issue: #<master-issue-number> > --- > Be sure to do all of the following to help us incorporate your contribution > quickly and easily: > > If this PR is a BookKeeper Proposal (BP): > > - [ ] Make sure the PR title is formatted like: > `<BP-#>: Description of bookkeeper proposal` > `e.g. BP-1: 64 bits ledger is support` > - [ ] Attach the master issue link in the description of this PR. > - [ ] Attach the google doc link if the BP is written in Google Doc. > > Otherwise: > > - [ ] Make sure the PR title is formatted like: > `<Issue # or BOOKKEEPER-#>: Description of pull request` > `e.g. Issue 123: Description ...` > `e.g. BOOKKEEPER-1234: Description ...` > - [ ] Make sure tests pass via `mvn clean apache-rat:check install spotbugs:check`. > - [ ] Replace `<Issue # or BOOKKEEPER-#>` in the title with the actual Issue/JIRA number. > > ---
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