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https://issues.apache.org/jira/browse/CASSANDRA-9893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14723847#comment-14723847
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Blake Eggleston commented on CASSANDRA-9893:
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The {{TestCQL.conditional_delete_test}} failure is caused by the interaction of 
two LegacyLayout behaviors. First, the static row is always prepended to the 
LegacyCell iterator here: 
https://github.com/apache/cassandra/blob/cassandra-3.0/src/java/org/apache/cassandra/db/LegacyLayout.java#L646.
 Second, the ColumnFilter instance deserialized from a 2.1 read command always 
has isFetchAll set to true. This may be more of a ColumnFilter.Builder problem, 
which sets isFetchAll to true if CFMetaData is present here: 
https://github.com/apache/cassandra/blob/cassandra-3.0/src/java/org/apache/cassandra/db/filter/ColumnFilter.java#L291

In any case, this causes the static cells to be passed back to the 2.1 node as 
part of the read response. I've added a 'maybeDisableFetchAll' method to the 
column filter builder, which is called from the legacy slice command 
deserializer, and turns off isFetchAll if the command isn't selecting all 
regular/static columns. This fixes the issue, and doesn't break anything else, 
but I'm not positive this is the best way to fix the problem. 
https://github.com/bdeggleston/cassandra/commit/5bacd62b7a6492cc91a8fd33846ea3a7d3ef9dfc

The {{TestPagingWithDeletions.test_failure_threshold_deletions}} failure was 
caused by an out of date log regex, which is fixed here: 
https://github.com/bdeggleston/cassandra-dtest/commit/28de3d11fe355a5289e70f38cb8e9e9d010a8059

I've also found these 2 tests, which are failing sporadically:
cql_tests:TestCQL.static_columns_cas_test
TestPagingSize.test_with_equal_results_to_page_size

> Fix upgrade tests from #9704 that are still failing
> ---------------------------------------------------
>
>                 Key: CASSANDRA-9893
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9893
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Sylvain Lebresne
>            Assignee: Blake Eggleston
>             Fix For: 3.0 beta 2
>
>
> The first things to do on this ticket would be to commit Tyler's branch 
> (https://github.com/thobbs/cassandra-dtest/tree/8099-backwards-compat) to the 
> dtests so cassci run them. I've had to do a few minor modifications to have 
> them run locally so someone which access to cassci should do it and make sure 
> it runs properly.
> Once we have that, we should fix any test that isn't passing. I've ran the 
> tests locally and I had 8 failures. for 2 of them, it sounds plausible that 
> they'll get fixed by the patch of CASSANDRA-9775, though that's just a guess. 
>  The rest where test that timeouted without a particular error in the log, 
> and running some of them individually, they passed.  So we'll have to see if 
> it's just my machine being overly slow when running them all.



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