[jira] [Resolved] (IMPALA-10398) Altering an Iceberg table might throw NullPointerException

["Zoltán Borók-Nagy (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-10398?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Zoltán Borók-Nagy resolved IMPALA-10398.
----------------------------------------
    Fix Version/s: Impala 4.0
       Resolution: Fixed

> Altering an Iceberg table might throw NullPointerException
> ----------------------------------------------------------
>
>                 Key: IMPALA-10398
>                 URL: https://issues.apache.org/jira/browse/IMPALA-10398
>             Project: IMPALA
>          Issue Type: Bug
>            Reporter: Zoltán Borók-Nagy
>            Assignee: Zoltán Borók-Nagy
>            Priority: Major
>             Fix For: Impala 4.0
>
>
> IcebergSchemaConverter has a static thread local member which can be uninitialized in the current thread when nextId() is invoked.
>   
>  In that case the thread local integer's get() method returns a null and we get a NullPointerException when we want to convert it to a builtin int.
> {noformat}
> I1215 17:25:28.418272 22202 jni-util.cc:288] java.lang.NullPointerException
>  at org.apache.impala.util.IcebergSchemaConverter.nextId(IcebergSchemaConverter.java:179)
>  at org.apache.impala.util.IcebergSchemaConverter.fromImpalaType(IcebergSchemaConverter.java:162)
>  at org.apache.impala.util.IcebergSchemaConverter.fromImpalaColumnType(IcebergSchemaConverter.java:121)
>  at org.apache.impala.service.IcebergCatalogOpExecutor.addColumn(IcebergCatalogOpExecutor.java:103)
>  at org.apache.impala.service.CatalogOpExecutor.alterIcebergTable(CatalogOpExecutor.java:972)
>  at org.apache.impala.service.CatalogOpExecutor.alterTable(CatalogOpExecutor.java:701)
>  at org.apache.impala.service.CatalogOpExecutor.execDdlRequest(CatalogOpExecutor.java:370)
>  at org.apache.impala.service.JniCatalog.execDdl(JniCatalog.java:171){noformat}
>  
>  Because of this issue test_alter_iceberg_tables is flaky, especially on systems with a high number of CPUs.
>   
>  The error can be reproduced by restarting the Impala cluster and adding complex types to an Iceberg table, e.g.:
> {noformat}
> ALTER TABLE ice_table
> ADD COLUMNS(map_test MAP <STRING, array <STRING>>, struct_test STRUCT <f1: BIGINT, f2: BIGINT>);{noformat}
>  
>   



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