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https://issues.apache.org/jira/browse/IMPALA-10168?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Quanlong Huang resolved IMPALA-10168.
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Fix Version/s: Impala 4.0
Resolution: Fixed
> Expose JSON catalog objects in catalogd's debug page
> ----------------------------------------------------
>
> Key: IMPALA-10168
> URL: https://issues.apache.org/jira/browse/IMPALA-10168
> Project: IMPALA
> Issue Type: New Feature
> Reporter: Quanlong Huang
> Assignee: Quanlong Huang
> Priority: Major
> Labels: observability
> Fix For: Impala 4.0
>
>
> Catalogd has a debug web page for showing catalog objects. Example URL:
> [http://localhost:25020/catalog_object?object_type=TABLE&object_name=functional.alltypes]
> Catalog objects are shown in thrift debug strings which are hard to parse for
> tests. We do have some tests parsing simple things from the thrift debug
> strings. For instances, we extract the catalog version here:
>
> [https://github.com/apache/impala/blob/fc19e70cbc94735c38e64573c1e015878f218281/tests/common/impala_service.py#L165]
> We verify whether a table is loaded by checking some substrings:
>
> [https://github.com/apache/impala/blob/9ecbe7d3dc22d7233e4bf2f91aaab43d0ad4e373/tests/custom_cluster/test_automatic_invalidation.py#L33-L34]
> However, it's hard to parse the partition ids of a hdfs table since the debug
> string is too complex. It'd be better to support exposing JSON results to
> ease test codes. JSON format results also help for customer to develop their
> monitor tools.
> The new URL can be something like
> [http://localhost:25020/catalog_object?json&object_type=TABLE&object_name=functional.alltypes]
> (Just adding a "json" parameter).
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