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https://issues.apache.org/jira/browse/HBASE-19289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16279142#comment-16279142
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Mike Drob commented on HBASE-19289:
-----------------------------------

Cool, I get this to fail locally now. I tried setting file system to 
{{raw:///}} then I realized that you were suggesting that as a future fix, not 
something that's available now, [~steve_l].

At least for our tests here, since we're testing higher level functionality in 
HBase we shouldn't need to care about the underlying FS implementation - there 
is an expectation that the local fs (ext3 or whatever) supports flush and sync, 
and beyond that there's no reason to start a full DFS cluster - this will add a 
lot of time to the test suite if it's not strictly necessary.

Anyway, I'm attaching a patch that will start a DFS cluster for tests where we 
need to use this. So far I've only done it for one test, but I know there are 
lots of failures out there... Attaching the WIP for initial review of the 
approach. [~elserj], [~tedyu] - WDYT?


> CommonFSUtils$StreamLacksCapabilityException: hflush when running test 
> against hadoop3 beta1
> --------------------------------------------------------------------------------------------
>
>                 Key: HBASE-19289
>                 URL: https://issues.apache.org/jira/browse/HBASE-19289
>             Project: HBase
>          Issue Type: Test
>            Reporter: Ted Yu
>         Attachments: 19289.v1.txt, 19289.v2.txt, HBASE-19289.patch
>
>
> As of commit d8fb10c8329b19223c91d3cda6ef149382ad4ea0 , I encountered the 
> following exception when running unit test against hadoop3 beta1:
> {code}
> testRefreshStoreFiles(org.apache.hadoop.hbase.regionserver.TestHStore)  Time 
> elapsed: 0.061 sec  <<< ERROR!
> java.io.IOException: cannot get log writer
>       at 
> org.apache.hadoop.hbase.regionserver.TestHStore.initHRegion(TestHStore.java:215)
>       at 
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:220)
>       at 
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:195)
>       at 
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:190)
>       at 
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:185)
>       at 
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:179)
>       at 
> org.apache.hadoop.hbase.regionserver.TestHStore.init(TestHStore.java:173)
>       at 
> org.apache.hadoop.hbase.regionserver.TestHStore.testRefreshStoreFiles(TestHStore.java:962)
> Caused by: 
> org.apache.hadoop.hbase.util.CommonFSUtils$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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