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https://issues.apache.org/jira/browse/IMPALA-11817?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17657000#comment-17657000
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Wenzhe Zhou commented on IMPALA-11817:
--------------------------------------
Impala is working closely with Kudu team to enable new features provided by
Kudu engine. Not like other third party libraries, Impala could upgrade Kudu in
the toolchain with the specific commit hash before next Kudu formal release.
This make Impala not able to use Kudu version to check compatibility.
Some new features require new APIs to be provided by Kudu client library, some
new features only need to upgrade Kudu server. There is always compatibility
issue if Kudu is behind the minimal required version for Impala. I don't think
it's viable to add a feature flag to disable bloom filters for kudu in Impala.
Otherwise we need to add a feature flag for each new Kudu feature. I discussed
this compatibility issue with Thomas when implement pushing bloom filters down
to Kudu and he did not agree to add such flag.
> Unable to open scanner for node with id '0' for Kudu table
> ----------------------------------------------------------
>
> Key: IMPALA-11817
> URL: https://issues.apache.org/jira/browse/IMPALA-11817
> Project: IMPALA
> Issue Type: Improvement
> Components: Frontend
> Affects Versions: Impala 4.0.0, Impala 4.1.0, Impala 4.2.0, Impala 4.1.1
> Reporter: qingqingqingtian
> Priority: Major
> Labels: impala, kudu
> Attachments: problem.sql
>
> Original Estimate: 72h
> Remaining Estimate: 72h
>
>
> Use two kudu tables to perform an associated left join query.
>
> sql Example:
>
> {code:java}
> select count(1) from dw_dwd_syky.dwd_dzyj_dzyjcg_dcfc_xxbak1208 DDX left join
> dw_dwd_syky.dwd_dzyj_dzyjcg_dcfcbak1208 DD ON DDX.c2 = DD.c2 ;
> error:
> Unable to open scanner for node with id '0' for Kudu table
> 'impala::dw_dwd_syky.dwd_dzyj_dzyjcg_dcfc_xxbak1208': Remote error:
> unsupported feature flags{code}
>
> *Environment*
> * kudu version: 1.10.0
> * impala version：4.1.1
> * hive version: 3.1.2
>
> Hopes to be compatible with lower versions of kudu
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