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From "Marcin (JIRA)" <j...@apache.org>
Subject [jira] Created: (SOLR-1842) DataImportHandler ODBC keeps lock on the source table while optimisatising is being run...
Date Wed, 24 Mar 2010 12:20:27 GMT
DataImportHandler ODBC keeps lock on the source table while optimisatising is being run...
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                 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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