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https://issues.apache.org/jira/browse/SOLR-1842?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12851945#action_12851945
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Hoss Man commented on SOLR-1842:
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Yeah, i don't know anything about ODBC, but it seems odd that DIH wouldn't
"commit" any transactions it opens to release the table locks. (unless this is
something to do with auto generated transactions in the ODBC Connector)
Marcin: it woul be helpful if you could provide a specific example of a DIH
config in which you see this problem (the simpler the better) ... perhaps you
are using some feature of DIH in a way that is unexpected and that's why the
table locks are living longer then they should.
> DataImportHandler ODBC keeps lock on the source table while optimisatising is
> being run...
> ------------------------------------------------------------------------------------------
>
> Key: SOLR-1842
> URL: https://issues.apache.org/jira/browse/SOLR-1842
> Project: Solr
> Issue Type: Bug
> Components: contrib - DataImportHandler
> Affects Versions: 1.5
> Reporter: Marcin
>
> Hi Guys,
> I don't know if its really a bug but I think its quite good place for it.
> The problem is with dataImportHandler and DB queries.
> For example:
> Let's have a big table which keeps docs to being indexed, we are running
> query against it on a datimporthandler and query locks table which is quite
> obvius and desire behaviour from the SQL points of view but while
> optimisation is being done its should not allow to issue query because in
> that case table is being locked till optimisation process will finish which
> can take a time...
> As a workaround you can use "select SQL_BUFFER_RESULT..." statment which will
> move everything into temp table and release all locks but still
> dataImportHandlerwill be waiting for optimisation to finish. Which means you
> will be able to insert new docs into main table at least.
> cheers
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