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Ran 07 Apr 2018 02:42PM UTC

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Committed 07 Apr 2018 02:42PM UTC coverage: 72.311% (-0.07%) from 72.382%

Job # 45.1

Build Type

push

jenkins

Committed by Sijie Guo

Commit Message

ISSUE #1316: A bookie with non-writable dirs should be able to start in readonly mode

Descriptions of the changes in this PR:

*Problem*

Bookie failed to start when it doesn't have non-writable dirs. Issue is reported at #1316

*Solution*

- Introduce a setting `minUsageSizeForEntryLogCreation` to allow creating entry logs even when there is no writable dirs. This setting is replacing `getIsForceGCAllowWhenNoSpace` for creating new log, since entry log files are created not only for gc/compaction. It can also happen on startup and also journal replays.

- Defer creating entry log files until first write happens, when there is no writable ledger dirs.

- add bunch of tests for EntryLog and Bookie initialization.

Master Issue: #1316
Related Issue: #190

Author: Sijie Guo <sijie@apache.org>

Reviewers: Charan Reddy Guttapalem <reddycharan18@gmail.com>

This closes #1319 from sijie/allow_bookie_to_start_with_no_writable_bookies, closes #1316

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