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https://issues.apache.org/jira/browse/HIVE-3253?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13698371#comment-13698371
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Ashutosh Chauhan commented on HIVE-3253:
----------------------------------------

Quite a big patch : ) Can you also update RB entry?
                
> ArrayIndexOutOfBounds exception for deeply nested structs
> ---------------------------------------------------------
>
>                 Key: HIVE-3253
>                 URL: https://issues.apache.org/jira/browse/HIVE-3253
>             Project: Hive
>          Issue Type: Bug
>          Components: Serializers/Deserializers
>    Affects Versions: 0.9.0, 0.10.0
>            Reporter: Swarnim Kulkarni
>            Assignee: Thejas M Nair
>         Attachments: HIVE-3253.2.patch, HIVE-3253.3.patch, 
> HIVE-3253_moar_nesting.1.patch, jsonout.hive
>
>
> It was observed that while creating table with deeply nested structs might 
> throw this exception:
> {code}
> java.lang.ArrayIndexOutOfBoundsException: 9
>         at 
> org.apache.hadoop.hive.serde2.lazy.LazyFactory.createLazyObjectInspector(LazyFactory.java:281)
>       at 
> org.apache.hadoop.hive.serde2.lazy.LazyFactory.createLazyObjectInspector(LazyFactory.java:263)
>       at 
> org.apache.hadoop.hive.serde2.lazy.LazyFactory.createLazyObjectInspector(LazyFactory.java:276)
>       at 
> org.apache.hadoop.hive.serde2.lazy.LazyFactory.createLazyObjectInspector(LazyFactory.java:263)
>       at 
> org.apache.hadoop.hive.serde2.lazy.LazyFactory.createLazyObjectInspector(LazyFactory.java:276)
>       at 
> org.apache.hadoop.hive.serde2.lazy.LazyFactory.createLazyObjectInspector(LazyFactory.java:263)
>       at 
> org.apache.hadoop.hive.serde2.lazy.LazyFactory.createLazyObjectInspector(LazyFactory.java:276)
>       at 
> org.apache.hadoop.hive.serde2.lazy.LazyFactory.createLazyObjectInspector(LazyFactory.java:263)
>       at 
> org.apache.hadoop.hive.serde2.lazy.LazyFactory.createLazyObjectInspector(LazyFactory.java:276)
>       at 
> org.apache.hadoop.hive.serde2.lazy.LazyFactory.createLazyStructInspector(LazyFactory.java:354)
> {code}
> The reason being that currently the separators array has been hardcoded to be 
> of size 8 in the LazySimpleSerde.
> {code}
> // Read the separators: We use 8 levels of separators by default, but we
> // should change this when we allow users to specify more than 10 levels
> // of separators through DDL.
> serdeParams.separators = new byte[8];
> {code}
> If possible, we should increase this size or at least make it configurable to 
> properly handle deeply nested structs.

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