Dimitris Tsirogiannis created IMPALA-6948:
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Summary: Coordinators don't detect the deletion of tables that
occurred outside of impala after catalog restart
Key: IMPALA-6948
URL: https://issues.apache.org/jira/browse/IMPALA-6948
Project: IMPALA
Issue Type: Bug
Components: Catalog
Affects Versions: Impala 3.0, Impala 2.12.0
Reporter: Dimitris Tsirogiannis
Assignee: Dimitris Tsirogiannis
Upon catalog restart the coordinators detect this event and request a full
topic update from the statestore. In certain cases, the topic update protocol
executed between the statestore and the catalog fails to detect catalog objects
that were deleted from the Metastore externally (e.g. via HIVE), thus causing
these objects to show up again in each coordinator's catalog cache. The end
result is that the catalog server and the coordinator's cache are out of sync
and in some cases the only solution is to restart both the catalog and the
statestore.
The following sequence can reproduce this issue:
{code:java}
impala> create table lala(int a);
bash> kill -9 `pidof catalogd`
hive> drop table lala;
bash> restart catalogd
impala> show tables;
--- lala shows up in the list of tables;{code}
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