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Posted to issues@calcite.apache.org by "Francis Chuang (Jira)" <ji...@apache.org> on 2019/12/06 04:28:00 UTC
[jira] [Updated] (CALCITE-3324) Infinite loop when calling DDL from
remote Avatica driver to LocalService wrapping CalciteMetaImpl
[ https://issues.apache.org/jira/browse/CALCITE-3324?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Francis Chuang updated CALCITE-3324:
------------------------------------
Fix Version/s: avatica-1.16.0
> Infinite loop when calling DDL from remote Avatica driver to LocalService wrapping CalciteMetaImpl
> --------------------------------------------------------------------------------------------------
>
> Key: CALCITE-3324
> URL: https://issues.apache.org/jira/browse/CALCITE-3324
> Project: Calcite
> Issue Type: Bug
> Affects Versions: 1.20.0
> Reporter: Robert Yokota
> Priority: Major
> Labels: pull-request-available
> Fix For: avatica-1.16.0
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> I encountered an infinite loop when submitting DDL from a remote Avatica driver (using sqlline) against a {{LocalService}} wrapping {{CalciteMetaImpl}}.
> I was able to debug the issue and verified a fix.
> The problem was that in {{CalciteMetaImpl.prepareAndExecute}}, the updateCount is not being passed to the {{MetaResultSet}} constructor. Instead, the updateCount is always set to -1. This incorrectly instructs the remote Avatica driver to fetch results when there aren't any, which causes it to loop.
> By fixing the {{CalciteMetaImpl.prepareAndExecute}} method to set the updateCount in {{MetaResultSet}}, I was able to fix the infinite loop.
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