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https://issues.apache.org/jira/browse/HBASE-19289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16282197#comment-16282197
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Mike Drob commented on HBASE-19289:
-----------------------------------
[~elserj] - let me see if I understand your proposed solution.
# Introduce new flag to not fail on the StreamCapability flush/sync checks (but
still print appropriate warnings)
# Apply this flag to unit tests that don't use an underlying DFS cluster
# Apply this flag to standalone clusters
# Update documentation to include blatant caveats about data loss in standalone
cluster
That doesn't seem right to me. We have a bunch of tests that check for data
correctness, that we're apparently running with a file system that does not
offer the guarantees that we expect. This is like the difference between
SloppyMath and StrictMath - one is fast; the other is accurate. Do we gain any
confidence from running tests quickly, seeing them pass, and then discovering
that we don't have the coverage we thought we did at a later date?
> CommonFSUtils$StreamLacksCapabilityException: hflush when running test
> against hadoop3 beta1
> --------------------------------------------------------------------------------------------
>
> Key: HBASE-19289
> URL: https://issues.apache.org/jira/browse/HBASE-19289
> Project: HBase
> Issue Type: Test
> Reporter: Ted Yu
> Assignee: Mike Drob
> Attachments: 19289.v1.txt, 19289.v2.txt, HBASE-19289.patch
>
>
> As of commit d8fb10c8329b19223c91d3cda6ef149382ad4ea0 , I encountered the
> following exception when running unit test against hadoop3 beta1:
> {code}
> testRefreshStoreFiles(org.apache.hadoop.hbase.regionserver.TestHStore) Time
> elapsed: 0.061 sec <<< ERROR!
> java.io.IOException: cannot get log writer
> at
> org.apache.hadoop.hbase.regionserver.TestHStore.initHRegion(TestHStore.java:215)
> at
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:220)
> at
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:195)
> at
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:190)
> at
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:185)
> at
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:179)
> at
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:173)
> at
> org.apache.hadoop.hbase.regionserver.TestHStore.testRefreshStoreFiles(TestHStore.java:962)
> Caused by:
> org.apache.hadoop.hbase.util.CommonFSUtils$StreamLacksCapabilityException:
> hflush
> at
> org.apache.hadoop.hbase.regionserver.TestHStore.initHRegion(TestHStore.java:215)
> at
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:220)
> at
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:195)
> at
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:190)
> at
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:185)
> at
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:179)
> at
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:173)
> at
> org.apache.hadoop.hbase.regionserver.TestHStore.testRefreshStoreFiles(TestHStore.java:962)
> {code}
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