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https://issues.apache.org/jira/browse/IMPALA-12845?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Becker resolved IMPALA-12845.
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Resolution: Fixed
> Crash with DESCRIBE on a complex type from an Iceberg table
> -----------------------------------------------------------
>
> Key: IMPALA-12845
> URL: https://issues.apache.org/jira/browse/IMPALA-12845
> Project: IMPALA
> Issue Type: Bug
> Reporter: Daniel Becker
> Assignee: Daniel Becker
> Priority: Critical
>
> A DESCRIBE statement on a struct contained in an Iceberg table crashes Impala:
> In Hive:
> {code:java}
> create table ice_struct (id INT, s STRUCT<i: INT>) stored by iceberg;{code}
> In Impala:
> {code:java}
> describe ice_struct.s
> Caught exception TSocket read 0 bytes, type=<class
> 'thrift.transport.TTransport.TTransportException'> in FetchResults.
> Error communicating with impalad: TSocket read 0 bytes{code}
> The logs in impalad.FATAL indicate that we hit a DCHECK:
> {code:java}
> F0227 11:53:49.936864 680819 query-result-set.cc:386] Check failed: num_col
> == metadata_.columns.size() (3 vs. 4){code}
>
> Note that this also happens with Iceberg metadata tables, for example:
> {code:java}
> describe
> functional_parquet.iceberg_query_metadata.entries.readable_metrics;{code}
> With non-Iceberg tables there is no error.
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