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https://issues.apache.org/jira/browse/CASSANDRA-19820?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17872274#comment-17872274
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Michael Semb Wever commented on CASSANDRA-19820:
------------------------------------------------
+1
> Fix tests extending FuzzTestBase when running test-compression profile
> ----------------------------------------------------------------------
>
> Key: CASSANDRA-19820
> URL: https://issues.apache.org/jira/browse/CASSANDRA-19820
> Project: Cassandra
> Issue Type: Bug
> Components: Local/Commit Log, Test/unit
> Reporter: Stefan Miklosovic
> Assignee: Stefan Miklosovic
> Priority: Normal
> Fix For: 5.0-rc2, 5.0.x, 5.x
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> FuzzTestBase extends CQLTester.InMemory which uses jimfs filesystem instead
> of the real one. This does not play well with direct mode of
> commitlog_disk_access_mode. We fixed this in CASSANDRA-19779 by always
> setting it to mmap. This does not work when we run tests in test-compression
> profile because then it expects "standard" mode and if fails on asserts.
> The solution to fix test-compression profile is to set
> commitlog_disk_access_mode to mmap only in case it was indeed resolved to
> direct and not every time.
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